target-i386: Make helper_cc_compute_{all,c} const

[qemu.git] / target-i386 / translate.c

/*
 *  i386 translation
 *
 *  Copyright (c) 2003 Fabrice Bellard
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
 */
#include <stdarg.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <inttypes.h>
#include <signal.h>

#include "qemu/host-utils.h"
#include "cpu.h"
#include "disas/disas.h"
#include "tcg-op.h"

#include "helper.h"
#define GEN_HELPER 1
#include "helper.h"

#define PREFIX_REPZ   0x01
#define PREFIX_REPNZ  0x02
#define PREFIX_LOCK   0x04
#define PREFIX_DATA   0x08
#define PREFIX_ADR    0x10

#ifdef TARGET_X86_64
#define CODE64(s) ((s)->code64)
#define REX_X(s) ((s)->rex_x)
#define REX_B(s) ((s)->rex_b)
#else
#define CODE64(s) 0
#define REX_X(s) 0
#define REX_B(s) 0
#endif

#ifdef TARGET_X86_64
# define ctztl  ctz64
# define clztl  clz64
#else
# define ctztl  ctz32
# define clztl  clz32
#endif

//#define MACRO_TEST   1

/* global register indexes */
static TCGv_ptr cpu_env;
static TCGv cpu_A0;
static TCGv cpu_cc_src, cpu_cc_dst, cpu_cc_srcT;
static TCGv_i32 cpu_cc_op;
static TCGv cpu_regs[CPU_NB_REGS];
/* local temps */
static TCGv cpu_T[2];
/* local register indexes (only used inside old micro ops) */
static TCGv cpu_tmp0, cpu_tmp4;
static TCGv_ptr cpu_ptr0, cpu_ptr1;
static TCGv_i32 cpu_tmp2_i32, cpu_tmp3_i32;
static TCGv_i64 cpu_tmp1_i64;
static TCGv cpu_tmp5;

static uint8_t gen_opc_cc_op[OPC_BUF_SIZE];

#include "exec/gen-icount.h"

#ifdef TARGET_X86_64
static int x86_64_hregs;
#endif

typedef struct DisasContext {
    /* current insn context */
    int override; /* -1 if no override */
    int prefix;
    int aflag, dflag;
    target_ulong pc; /* pc = eip + cs_base */
    int is_jmp; /* 1 = means jump (stop translation), 2 means CPU
                   static state change (stop translation) */
    /* current block context */
    target_ulong cs_base; /* base of CS segment */
    int pe;     /* protected mode */
    int code32; /* 32 bit code segment */
#ifdef TARGET_X86_64
    int lma;    /* long mode active */
    int code64; /* 64 bit code segment */
    int rex_x, rex_b;
#endif
    int ss32;   /* 32 bit stack segment */
    CCOp cc_op;  /* current CC operation */
    bool cc_op_dirty;
    int addseg; /* non zero if either DS/ES/SS have a non zero base */
    int f_st;   /* currently unused */
    int vm86;   /* vm86 mode */
    int cpl;
    int iopl;
    int tf;     /* TF cpu flag */
    int singlestep_enabled; /* "hardware" single step enabled */
    int jmp_opt; /* use direct block chaining for direct jumps */
    int mem_index; /* select memory access functions */
    uint64_t flags; /* all execution flags */
    struct TranslationBlock *tb;
    int popl_esp_hack; /* for correct popl with esp base handling */
    int rip_offset; /* only used in x86_64, but left for simplicity */
    int cpuid_features;
    int cpuid_ext_features;
    int cpuid_ext2_features;
    int cpuid_ext3_features;
    int cpuid_7_0_ebx_features;
} DisasContext;

static void gen_eob(DisasContext *s);
static void gen_jmp(DisasContext *s, target_ulong eip);
static void gen_jmp_tb(DisasContext *s, target_ulong eip, int tb_num);
static void gen_op(DisasContext *s1, int op, int ot, int d);

/* i386 arith/logic operations */
enum {
    OP_ADDL,
    OP_ORL,
    OP_ADCL,
    OP_SBBL,
    OP_ANDL,
    OP_SUBL,
    OP_XORL,
    OP_CMPL,
};

/* i386 shift ops */
enum {
    OP_ROL,
    OP_ROR,
    OP_RCL,
    OP_RCR,
    OP_SHL,
    OP_SHR,
    OP_SHL1, /* undocumented */
    OP_SAR = 7,
};

enum {
    JCC_O,
    JCC_B,
    JCC_Z,
    JCC_BE,
    JCC_S,
    JCC_P,
    JCC_L,
    JCC_LE,
};

/* operand size */
enum {
    OT_BYTE = 0,
    OT_WORD,
    OT_LONG,
    OT_QUAD,
};

enum {
    /* I386 int registers */
    OR_EAX,   /* MUST be even numbered */
    OR_ECX,
    OR_EDX,
    OR_EBX,
    OR_ESP,
    OR_EBP,
    OR_ESI,
    OR_EDI,

    OR_TMP0 = 16,    /* temporary operand register */
    OR_TMP1,
    OR_A0, /* temporary register used when doing address evaluation */
};

enum {
    USES_CC_DST  = 1,
    USES_CC_SRC  = 2,
    USES_CC_SRCT = 4,
};

/* Bit set if the global variable is live after setting CC_OP to X.  */
static const uint8_t cc_op_live[CC_OP_NB] = {
    [CC_OP_DYNAMIC] = USES_CC_DST | USES_CC_SRC,
    [CC_OP_EFLAGS] = USES_CC_SRC,
    [CC_OP_MULB ... CC_OP_MULQ] = USES_CC_DST | USES_CC_SRC,
    [CC_OP_ADDB ... CC_OP_ADDQ] = USES_CC_DST | USES_CC_SRC,
    [CC_OP_ADCB ... CC_OP_ADCQ] = USES_CC_DST | USES_CC_SRC,
    [CC_OP_SUBB ... CC_OP_SUBQ] = USES_CC_DST | USES_CC_SRC | USES_CC_SRCT,
    [CC_OP_SBBB ... CC_OP_SBBQ] = USES_CC_DST | USES_CC_SRC,
    [CC_OP_LOGICB ... CC_OP_LOGICQ] = USES_CC_DST,
    [CC_OP_INCB ... CC_OP_INCQ] = USES_CC_DST | USES_CC_SRC,
    [CC_OP_DECB ... CC_OP_DECQ] = USES_CC_DST | USES_CC_SRC,
    [CC_OP_SHLB ... CC_OP_SHLQ] = USES_CC_DST | USES_CC_SRC,
    [CC_OP_SARB ... CC_OP_SARQ] = USES_CC_DST | USES_CC_SRC,
};

static void set_cc_op(DisasContext *s, CCOp op)
{
    int dead;

    if (s->cc_op == op) {
        return;
    }

    /* Discard CC computation that will no longer be used.  */
    dead = cc_op_live[s->cc_op] & ~cc_op_live[op];
    if (dead & USES_CC_DST) {
        tcg_gen_discard_tl(cpu_cc_dst);
    }
    if (dead & USES_CC_SRC) {
        tcg_gen_discard_tl(cpu_cc_src);
    }
    if (dead & USES_CC_SRCT) {
        tcg_gen_discard_tl(cpu_cc_srcT);
    }

    s->cc_op = op;
    /* The DYNAMIC setting is translator only, and should never be
       stored.  Thus we always consider it clean.  */
    s->cc_op_dirty = (op != CC_OP_DYNAMIC);
}

static void gen_update_cc_op(DisasContext *s)
{
    if (s->cc_op_dirty) {
        tcg_gen_movi_i32(cpu_cc_op, s->cc_op);
        s->cc_op_dirty = false;
    }
}

static inline void gen_op_movl_T0_0(void)
{
    tcg_gen_movi_tl(cpu_T[0], 0);
}

static inline void gen_op_movl_T0_im(int32_t val)
{
    tcg_gen_movi_tl(cpu_T[0], val);
}

static inline void gen_op_movl_T0_imu(uint32_t val)
{
    tcg_gen_movi_tl(cpu_T[0], val);
}

static inline void gen_op_movl_T1_im(int32_t val)
{
    tcg_gen_movi_tl(cpu_T[1], val);
}

static inline void gen_op_movl_T1_imu(uint32_t val)
{
    tcg_gen_movi_tl(cpu_T[1], val);
}

static inline void gen_op_movl_A0_im(uint32_t val)
{
    tcg_gen_movi_tl(cpu_A0, val);
}

#ifdef TARGET_X86_64
static inline void gen_op_movq_A0_im(int64_t val)
{
    tcg_gen_movi_tl(cpu_A0, val);
}
#endif

static inline void gen_movtl_T0_im(target_ulong val)
{
    tcg_gen_movi_tl(cpu_T[0], val);
}

static inline void gen_movtl_T1_im(target_ulong val)
{
    tcg_gen_movi_tl(cpu_T[1], val);
}

static inline void gen_op_andl_T0_ffff(void)
{
    tcg_gen_andi_tl(cpu_T[0], cpu_T[0], 0xffff);
}

static inline void gen_op_andl_T0_im(uint32_t val)
{
    tcg_gen_andi_tl(cpu_T[0], cpu_T[0], val);
}

static inline void gen_op_movl_T0_T1(void)
{
    tcg_gen_mov_tl(cpu_T[0], cpu_T[1]);
}

static inline void gen_op_andl_A0_ffff(void)
{
    tcg_gen_andi_tl(cpu_A0, cpu_A0, 0xffff);
}

#ifdef TARGET_X86_64

#define NB_OP_SIZES 4

#else /* !TARGET_X86_64 */

#define NB_OP_SIZES 3

#endif /* !TARGET_X86_64 */

#if defined(HOST_WORDS_BIGENDIAN)
#define REG_B_OFFSET (sizeof(target_ulong) - 1)
#define REG_H_OFFSET (sizeof(target_ulong) - 2)
#define REG_W_OFFSET (sizeof(target_ulong) - 2)
#define REG_L_OFFSET (sizeof(target_ulong) - 4)
#define REG_LH_OFFSET (sizeof(target_ulong) - 8)
#else
#define REG_B_OFFSET 0
#define REG_H_OFFSET 1
#define REG_W_OFFSET 0
#define REG_L_OFFSET 0
#define REG_LH_OFFSET 4
#endif

/* In instruction encodings for byte register accesses the
 * register number usually indicates "low 8 bits of register N";
 * however there are some special cases where N 4..7 indicates
 * [AH, CH, DH, BH], ie "bits 15..8 of register N-4". Return
 * true for this special case, false otherwise.
 */
static inline bool byte_reg_is_xH(int reg)
{
    if (reg < 4) {
        return false;
    }
#ifdef TARGET_X86_64
    if (reg >= 8 || x86_64_hregs) {
        return false;
    }
#endif
    return true;
}

static inline void gen_op_mov_reg_v(int ot, int reg, TCGv t0)
{
    switch(ot) {
    case OT_BYTE:
        if (!byte_reg_is_xH(reg)) {
            tcg_gen_deposit_tl(cpu_regs[reg], cpu_regs[reg], t0, 0, 8);
        } else {
            tcg_gen_deposit_tl(cpu_regs[reg - 4], cpu_regs[reg - 4], t0, 8, 8);
        }
        break;
    case OT_WORD:
        tcg_gen_deposit_tl(cpu_regs[reg], cpu_regs[reg], t0, 0, 16);
        break;
    default: /* XXX this shouldn't be reached;  abort? */
    case OT_LONG:
        /* For x86_64, this sets the higher half of register to zero.
           For i386, this is equivalent to a mov. */
        tcg_gen_ext32u_tl(cpu_regs[reg], t0);
        break;
#ifdef TARGET_X86_64
    case OT_QUAD:
        tcg_gen_mov_tl(cpu_regs[reg], t0);
        break;
#endif
    }
}

static inline void gen_op_mov_reg_T0(int ot, int reg)
{
    gen_op_mov_reg_v(ot, reg, cpu_T[0]);
}

static inline void gen_op_mov_reg_T1(int ot, int reg)
{
    gen_op_mov_reg_v(ot, reg, cpu_T[1]);
}

static inline void gen_op_mov_reg_A0(int size, int reg)
{
    switch(size) {
    case OT_BYTE:
        tcg_gen_deposit_tl(cpu_regs[reg], cpu_regs[reg], cpu_A0, 0, 16);
        break;
    default: /* XXX this shouldn't be reached;  abort? */
    case OT_WORD:
        /* For x86_64, this sets the higher half of register to zero.
           For i386, this is equivalent to a mov. */
        tcg_gen_ext32u_tl(cpu_regs[reg], cpu_A0);
        break;
#ifdef TARGET_X86_64
    case OT_LONG:
        tcg_gen_mov_tl(cpu_regs[reg], cpu_A0);
        break;
#endif
    }
}

static inline void gen_op_mov_v_reg(int ot, TCGv t0, int reg)
{
    if (ot == OT_BYTE && byte_reg_is_xH(reg)) {
        tcg_gen_shri_tl(t0, cpu_regs[reg - 4], 8);
        tcg_gen_ext8u_tl(t0, t0);
    } else {
        tcg_gen_mov_tl(t0, cpu_regs[reg]);
    }
}

static inline void gen_op_mov_TN_reg(int ot, int t_index, int reg)
{
    gen_op_mov_v_reg(ot, cpu_T[t_index], reg);
}

static inline void gen_op_movl_A0_reg(int reg)
{
    tcg_gen_mov_tl(cpu_A0, cpu_regs[reg]);
}

static inline void gen_op_addl_A0_im(int32_t val)
{
    tcg_gen_addi_tl(cpu_A0, cpu_A0, val);
#ifdef TARGET_X86_64
    tcg_gen_andi_tl(cpu_A0, cpu_A0, 0xffffffff);
#endif
}

#ifdef TARGET_X86_64
static inline void gen_op_addq_A0_im(int64_t val)
{
    tcg_gen_addi_tl(cpu_A0, cpu_A0, val);
}
#endif
    
static void gen_add_A0_im(DisasContext *s, int val)
{
#ifdef TARGET_X86_64
    if (CODE64(s))
        gen_op_addq_A0_im(val);
    else
#endif
        gen_op_addl_A0_im(val);
}

static inline void gen_op_addl_T0_T1(void)
{
    tcg_gen_add_tl(cpu_T[0], cpu_T[0], cpu_T[1]);
}

static inline void gen_op_jmp_T0(void)
{
    tcg_gen_st_tl(cpu_T[0], cpu_env, offsetof(CPUX86State, eip));
}

static inline void gen_op_add_reg_im(int size, int reg, int32_t val)
{
    switch(size) {
    case OT_BYTE:
        tcg_gen_addi_tl(cpu_tmp0, cpu_regs[reg], val);
        tcg_gen_deposit_tl(cpu_regs[reg], cpu_regs[reg], cpu_tmp0, 0, 16);
        break;
    case OT_WORD:
        tcg_gen_addi_tl(cpu_tmp0, cpu_regs[reg], val);
        /* For x86_64, this sets the higher half of register to zero.
           For i386, this is equivalent to a nop. */
        tcg_gen_ext32u_tl(cpu_tmp0, cpu_tmp0);
        tcg_gen_mov_tl(cpu_regs[reg], cpu_tmp0);
        break;
#ifdef TARGET_X86_64
    case OT_LONG:
        tcg_gen_addi_tl(cpu_regs[reg], cpu_regs[reg], val);
        break;
#endif
    }
}

static inline void gen_op_add_reg_T0(int size, int reg)
{
    switch(size) {
    case OT_BYTE:
        tcg_gen_add_tl(cpu_tmp0, cpu_regs[reg], cpu_T[0]);
        tcg_gen_deposit_tl(cpu_regs[reg], cpu_regs[reg], cpu_tmp0, 0, 16);
        break;
    case OT_WORD:
        tcg_gen_add_tl(cpu_tmp0, cpu_regs[reg], cpu_T[0]);
        /* For x86_64, this sets the higher half of register to zero.
           For i386, this is equivalent to a nop. */
        tcg_gen_ext32u_tl(cpu_tmp0, cpu_tmp0);
        tcg_gen_mov_tl(cpu_regs[reg], cpu_tmp0);
        break;
#ifdef TARGET_X86_64
    case OT_LONG:
        tcg_gen_add_tl(cpu_regs[reg], cpu_regs[reg], cpu_T[0]);
        break;
#endif
    }
}

static inline void gen_op_addl_A0_reg_sN(int shift, int reg)
{
    tcg_gen_mov_tl(cpu_tmp0, cpu_regs[reg]);
    if (shift != 0)
        tcg_gen_shli_tl(cpu_tmp0, cpu_tmp0, shift);
    tcg_gen_add_tl(cpu_A0, cpu_A0, cpu_tmp0);
    /* For x86_64, this sets the higher half of register to zero.
       For i386, this is equivalent to a nop. */
    tcg_gen_ext32u_tl(cpu_A0, cpu_A0);
}

static inline void gen_op_movl_A0_seg(int reg)
{
    tcg_gen_ld32u_tl(cpu_A0, cpu_env, offsetof(CPUX86State, segs[reg].base) + REG_L_OFFSET);
}

static inline void gen_op_addl_A0_seg(DisasContext *s, int reg)
{
    tcg_gen_ld_tl(cpu_tmp0, cpu_env, offsetof(CPUX86State, segs[reg].base));
#ifdef TARGET_X86_64
    if (CODE64(s)) {
        tcg_gen_andi_tl(cpu_A0, cpu_A0, 0xffffffff);
        tcg_gen_add_tl(cpu_A0, cpu_A0, cpu_tmp0);
    } else {
        tcg_gen_add_tl(cpu_A0, cpu_A0, cpu_tmp0);
        tcg_gen_andi_tl(cpu_A0, cpu_A0, 0xffffffff);
    }
#else
    tcg_gen_add_tl(cpu_A0, cpu_A0, cpu_tmp0);
#endif
}

#ifdef TARGET_X86_64
static inline void gen_op_movq_A0_seg(int reg)
{
    tcg_gen_ld_tl(cpu_A0, cpu_env, offsetof(CPUX86State, segs[reg].base));
}

static inline void gen_op_addq_A0_seg(int reg)
{
    tcg_gen_ld_tl(cpu_tmp0, cpu_env, offsetof(CPUX86State, segs[reg].base));
    tcg_gen_add_tl(cpu_A0, cpu_A0, cpu_tmp0);
}

static inline void gen_op_movq_A0_reg(int reg)
{
    tcg_gen_mov_tl(cpu_A0, cpu_regs[reg]);
}

static inline void gen_op_addq_A0_reg_sN(int shift, int reg)
{
    tcg_gen_mov_tl(cpu_tmp0, cpu_regs[reg]);
    if (shift != 0)
        tcg_gen_shli_tl(cpu_tmp0, cpu_tmp0, shift);
    tcg_gen_add_tl(cpu_A0, cpu_A0, cpu_tmp0);
}
#endif

static inline void gen_op_lds_T0_A0(int idx)
{
    int mem_index = (idx >> 2) - 1;
    switch(idx & 3) {
    case OT_BYTE:
        tcg_gen_qemu_ld8s(cpu_T[0], cpu_A0, mem_index);
        break;
    case OT_WORD:
        tcg_gen_qemu_ld16s(cpu_T[0], cpu_A0, mem_index);
        break;
    default:
    case OT_LONG:
        tcg_gen_qemu_ld32s(cpu_T[0], cpu_A0, mem_index);
        break;
    }
}

static inline void gen_op_ld_v(int idx, TCGv t0, TCGv a0)
{
    int mem_index = (idx >> 2) - 1;
    switch(idx & 3) {
    case OT_BYTE:
        tcg_gen_qemu_ld8u(t0, a0, mem_index);
        break;
    case OT_WORD:
        tcg_gen_qemu_ld16u(t0, a0, mem_index);
        break;
    case OT_LONG:
        tcg_gen_qemu_ld32u(t0, a0, mem_index);
        break;
    default:
    case OT_QUAD:
        /* Should never happen on 32-bit targets.  */
#ifdef TARGET_X86_64
        tcg_gen_qemu_ld64(t0, a0, mem_index);
#endif
        break;
    }
}

/* XXX: always use ldu or lds */
static inline void gen_op_ld_T0_A0(int idx)
{
    gen_op_ld_v(idx, cpu_T[0], cpu_A0);
}

static inline void gen_op_ldu_T0_A0(int idx)
{
    gen_op_ld_v(idx, cpu_T[0], cpu_A0);
}

static inline void gen_op_ld_T1_A0(int idx)
{
    gen_op_ld_v(idx, cpu_T[1], cpu_A0);
}

static inline void gen_op_st_v(int idx, TCGv t0, TCGv a0)
{
    int mem_index = (idx >> 2) - 1;
    switch(idx & 3) {
    case OT_BYTE:
        tcg_gen_qemu_st8(t0, a0, mem_index);
        break;
    case OT_WORD:
        tcg_gen_qemu_st16(t0, a0, mem_index);
        break;
    case OT_LONG:
        tcg_gen_qemu_st32(t0, a0, mem_index);
        break;
    default:
    case OT_QUAD:
        /* Should never happen on 32-bit targets.  */
#ifdef TARGET_X86_64
        tcg_gen_qemu_st64(t0, a0, mem_index);
#endif
        break;
    }
}

static inline void gen_op_st_T0_A0(int idx)
{
    gen_op_st_v(idx, cpu_T[0], cpu_A0);
}

static inline void gen_op_st_T1_A0(int idx)
{
    gen_op_st_v(idx, cpu_T[1], cpu_A0);
}

static inline void gen_jmp_im(target_ulong pc)
{
    tcg_gen_movi_tl(cpu_tmp0, pc);
    tcg_gen_st_tl(cpu_tmp0, cpu_env, offsetof(CPUX86State, eip));
}

static inline void gen_string_movl_A0_ESI(DisasContext *s)
{
    int override;

    override = s->override;
#ifdef TARGET_X86_64
    if (s->aflag == 2) {
        if (override >= 0) {
            gen_op_movq_A0_seg(override);
            gen_op_addq_A0_reg_sN(0, R_ESI);
        } else {
            gen_op_movq_A0_reg(R_ESI);
        }
    } else
#endif
    if (s->aflag) {
        /* 32 bit address */
        if (s->addseg && override < 0)
            override = R_DS;
        if (override >= 0) {
            gen_op_movl_A0_seg(override);
            gen_op_addl_A0_reg_sN(0, R_ESI);
        } else {
            gen_op_movl_A0_reg(R_ESI);
        }
    } else {
        /* 16 address, always override */
        if (override < 0)
            override = R_DS;
        gen_op_movl_A0_reg(R_ESI);
        gen_op_andl_A0_ffff();
        gen_op_addl_A0_seg(s, override);
    }
}

static inline void gen_string_movl_A0_EDI(DisasContext *s)
{
#ifdef TARGET_X86_64
    if (s->aflag == 2) {
        gen_op_movq_A0_reg(R_EDI);
    } else
#endif
    if (s->aflag) {
        if (s->addseg) {
            gen_op_movl_A0_seg(R_ES);
            gen_op_addl_A0_reg_sN(0, R_EDI);
        } else {
            gen_op_movl_A0_reg(R_EDI);
        }
    } else {
        gen_op_movl_A0_reg(R_EDI);
        gen_op_andl_A0_ffff();
        gen_op_addl_A0_seg(s, R_ES);
    }
}

static inline void gen_op_movl_T0_Dshift(int ot) 
{
    tcg_gen_ld32s_tl(cpu_T[0], cpu_env, offsetof(CPUX86State, df));
    tcg_gen_shli_tl(cpu_T[0], cpu_T[0], ot);
};

static TCGv gen_ext_tl(TCGv dst, TCGv src, int size, bool sign)
{
    switch (size) {
    case OT_BYTE:
        if (sign) {
            tcg_gen_ext8s_tl(dst, src);
        } else {
            tcg_gen_ext8u_tl(dst, src);
        }
        return dst;
    case OT_WORD:
        if (sign) {
            tcg_gen_ext16s_tl(dst, src);
        } else {
            tcg_gen_ext16u_tl(dst, src);
        }
        return dst;
#ifdef TARGET_X86_64
    case OT_LONG:
        if (sign) {
            tcg_gen_ext32s_tl(dst, src);
        } else {
            tcg_gen_ext32u_tl(dst, src);
        }
        return dst;
#endif
    default:
        return src;
    }
}

static void gen_extu(int ot, TCGv reg)
{
    gen_ext_tl(reg, reg, ot, false);
}

static void gen_exts(int ot, TCGv reg)
{
    gen_ext_tl(reg, reg, ot, true);
}

static inline void gen_op_jnz_ecx(int size, int label1)
{
    tcg_gen_mov_tl(cpu_tmp0, cpu_regs[R_ECX]);
    gen_extu(size + 1, cpu_tmp0);
    tcg_gen_brcondi_tl(TCG_COND_NE, cpu_tmp0, 0, label1);
}

static inline void gen_op_jz_ecx(int size, int label1)
{
    tcg_gen_mov_tl(cpu_tmp0, cpu_regs[R_ECX]);
    gen_extu(size + 1, cpu_tmp0);
    tcg_gen_brcondi_tl(TCG_COND_EQ, cpu_tmp0, 0, label1);
}

static void gen_helper_in_func(int ot, TCGv v, TCGv_i32 n)
{
    switch (ot) {
    case OT_BYTE:
        gen_helper_inb(v, n);
        break;
    case OT_WORD:
        gen_helper_inw(v, n);
        break;
    case OT_LONG:
        gen_helper_inl(v, n);
        break;
    }
}

static void gen_helper_out_func(int ot, TCGv_i32 v, TCGv_i32 n)
{
    switch (ot) {
    case OT_BYTE:
        gen_helper_outb(v, n);
        break;
    case OT_WORD:
        gen_helper_outw(v, n);
        break;
    case OT_LONG:
        gen_helper_outl(v, n);
        break;
    }
}

static void gen_check_io(DisasContext *s, int ot, target_ulong cur_eip,
                         uint32_t svm_flags)
{
    int state_saved;
    target_ulong next_eip;

    state_saved = 0;
    if (s->pe && (s->cpl > s->iopl || s->vm86)) {
        gen_update_cc_op(s);
        gen_jmp_im(cur_eip);
        state_saved = 1;
        tcg_gen_trunc_tl_i32(cpu_tmp2_i32, cpu_T[0]);
        switch (ot) {
        case OT_BYTE:
            gen_helper_check_iob(cpu_env, cpu_tmp2_i32);
            break;
        case OT_WORD:
            gen_helper_check_iow(cpu_env, cpu_tmp2_i32);
            break;
        case OT_LONG:
            gen_helper_check_iol(cpu_env, cpu_tmp2_i32);
            break;
        }
    }
    if(s->flags & HF_SVMI_MASK) {
        if (!state_saved) {
            gen_update_cc_op(s);
            gen_jmp_im(cur_eip);
        }
        svm_flags |= (1 << (4 + ot));
        next_eip = s->pc - s->cs_base;
        tcg_gen_trunc_tl_i32(cpu_tmp2_i32, cpu_T[0]);
        gen_helper_svm_check_io(cpu_env, cpu_tmp2_i32,
                                tcg_const_i32(svm_flags),
                                tcg_const_i32(next_eip - cur_eip));
    }
}

static inline void gen_movs(DisasContext *s, int ot)
{
    gen_string_movl_A0_ESI(s);
    gen_op_ld_T0_A0(ot + s->mem_index);
    gen_string_movl_A0_EDI(s);
    gen_op_st_T0_A0(ot + s->mem_index);
    gen_op_movl_T0_Dshift(ot);
    gen_op_add_reg_T0(s->aflag, R_ESI);
    gen_op_add_reg_T0(s->aflag, R_EDI);
}

static void gen_op_update1_cc(void)
{
    tcg_gen_mov_tl(cpu_cc_dst, cpu_T[0]);
}

static void gen_op_update2_cc(void)
{
    tcg_gen_mov_tl(cpu_cc_src, cpu_T[1]);
    tcg_gen_mov_tl(cpu_cc_dst, cpu_T[0]);
}

static inline void gen_op_testl_T0_T1_cc(void)
{
    tcg_gen_and_tl(cpu_cc_dst, cpu_T[0], cpu_T[1]);
}

static void gen_op_update_neg_cc(void)
{
    tcg_gen_mov_tl(cpu_cc_dst, cpu_T[0]);
    tcg_gen_neg_tl(cpu_cc_src, cpu_T[0]);
    tcg_gen_movi_tl(cpu_cc_srcT, 0);
}

/* compute all eflags to cc_src */
static void gen_compute_eflags(DisasContext *s)
{
    TCGv zero, dst, src1;
    int live, dead;

    if (s->cc_op == CC_OP_EFLAGS) {
        return;
    }

    TCGV_UNUSED(zero);
    dst = cpu_cc_dst;
    src1 = cpu_cc_src;

    /* Take care to not read values that are not live.  */
    live = cc_op_live[s->cc_op] & ~USES_CC_SRCT;
    dead = live ^ (USES_CC_DST | USES_CC_SRC);
    if (dead) {
        zero = tcg_const_tl(0);
        if (dead & USES_CC_DST) {
            dst = zero;
        }
        if (dead & USES_CC_SRC) {
            src1 = zero;
        }
    }

    gen_update_cc_op(s);
    gen_helper_cc_compute_all(cpu_cc_src, dst, src1, cpu_cc_op);
    set_cc_op(s, CC_OP_EFLAGS);

    if (dead) {
        tcg_temp_free(zero);
    }
}

typedef struct CCPrepare {
    TCGCond cond;
    TCGv reg;
    TCGv reg2;
    target_ulong imm;
    target_ulong mask;
    bool use_reg2;
    bool no_setcond;
} CCPrepare;

/* compute eflags.C to reg */
static CCPrepare gen_prepare_eflags_c(DisasContext *s, TCGv reg)
{
    TCGv t0, t1;
    int size, shift;

    switch (s->cc_op) {
    case CC_OP_SUBB ... CC_OP_SUBQ:
        /* (DATA_TYPE)CC_SRCT < (DATA_TYPE)CC_SRC */
        size = s->cc_op - CC_OP_SUBB;
        t1 = gen_ext_tl(cpu_tmp0, cpu_cc_src, size, false);
        /* If no temporary was used, be careful not to alias t1 and t0.  */
        t0 = TCGV_EQUAL(t1, cpu_cc_src) ? cpu_tmp0 : reg;
        tcg_gen_mov_tl(t0, cpu_cc_srcT);
        gen_extu(size, t0);
        goto add_sub;

    case CC_OP_ADDB ... CC_OP_ADDQ:
        /* (DATA_TYPE)CC_DST < (DATA_TYPE)CC_SRC */
        size = s->cc_op - CC_OP_ADDB;
        t1 = gen_ext_tl(cpu_tmp0, cpu_cc_src, size, false);
        t0 = gen_ext_tl(reg, cpu_cc_dst, size, false);
    add_sub:
        return (CCPrepare) { .cond = TCG_COND_LTU, .reg = t0,
                             .reg2 = t1, .mask = -1, .use_reg2 = true };

    case CC_OP_SBBB ... CC_OP_SBBQ:
        /* (DATA_TYPE)(CC_DST + CC_SRC + 1) <= (DATA_TYPE)CC_SRC */
        size = s->cc_op - CC_OP_SBBB;
        t1 = gen_ext_tl(cpu_tmp0, cpu_cc_src, size, false);
        if (TCGV_EQUAL(t1, reg) && TCGV_EQUAL(reg, cpu_cc_src)) {
            tcg_gen_mov_tl(cpu_tmp0, cpu_cc_src);
            t1 = cpu_tmp0;
        }

        tcg_gen_add_tl(reg, cpu_cc_dst, cpu_cc_src);
        tcg_gen_addi_tl(reg, reg, 1);
        gen_extu(size, reg);
        t0 = reg;
        goto adc_sbb;

    case CC_OP_ADCB ... CC_OP_ADCQ:
        /* (DATA_TYPE)CC_DST <= (DATA_TYPE)CC_SRC */
        size = s->cc_op - CC_OP_ADCB;
        t1 = gen_ext_tl(cpu_tmp0, cpu_cc_src, size, false);
        t0 = gen_ext_tl(reg, cpu_cc_dst, size, false);
    adc_sbb:
        return (CCPrepare) { .cond = TCG_COND_LEU, .reg = t0,
                             .reg2 = t1, .mask = -1, .use_reg2 = true };

    case CC_OP_LOGICB ... CC_OP_LOGICQ:
        return (CCPrepare) { .cond = TCG_COND_NEVER, .mask = -1 };

    case CC_OP_INCB ... CC_OP_INCQ:
    case CC_OP_DECB ... CC_OP_DECQ:
        return (CCPrepare) { .cond = TCG_COND_NE, .reg = cpu_cc_src,
                             .mask = -1, .no_setcond = true };

    case CC_OP_SHLB ... CC_OP_SHLQ:
        /* (CC_SRC >> (DATA_BITS - 1)) & 1 */
        size = s->cc_op - CC_OP_SHLB;
        shift = (8 << size) - 1;
        return (CCPrepare) { .cond = TCG_COND_NE, .reg = cpu_cc_src,
                             .mask = (target_ulong)1 << shift };

    case CC_OP_MULB ... CC_OP_MULQ:
        return (CCPrepare) { .cond = TCG_COND_NE,
                             .reg = cpu_cc_src, .mask = -1 };

    case CC_OP_EFLAGS:
    case CC_OP_SARB ... CC_OP_SARQ:
        /* CC_SRC & 1 */
        return (CCPrepare) { .cond = TCG_COND_NE,
                             .reg = cpu_cc_src, .mask = CC_C };

    default:
       /* The need to compute only C from CC_OP_DYNAMIC is important
          in efficiently implementing e.g. INC at the start of a TB.  */
       gen_update_cc_op(s);
       gen_helper_cc_compute_c(reg, cpu_cc_dst, cpu_cc_src, cpu_cc_op);
       return (CCPrepare) { .cond = TCG_COND_NE, .reg = reg,
                            .mask = -1, .no_setcond = true };
    }
}

/* compute eflags.P to reg */
static CCPrepare gen_prepare_eflags_p(DisasContext *s, TCGv reg)
{
    gen_compute_eflags(s);
    return (CCPrepare) { .cond = TCG_COND_NE, .reg = cpu_cc_src,
                         .mask = CC_P };
}

/* compute eflags.S to reg */
static CCPrepare gen_prepare_eflags_s(DisasContext *s, TCGv reg)
{
    switch (s->cc_op) {
    case CC_OP_DYNAMIC:
        gen_compute_eflags(s);
        /* FALLTHRU */
    case CC_OP_EFLAGS:
        return (CCPrepare) { .cond = TCG_COND_NE, .reg = cpu_cc_src,
                             .mask = CC_S };
    default:
        {
            int size = (s->cc_op - CC_OP_ADDB) & 3;
            TCGv t0 = gen_ext_tl(reg, cpu_cc_dst, size, true);
            return (CCPrepare) { .cond = TCG_COND_LT, .reg = t0, .mask = -1 };
        }
    }
}

/* compute eflags.O to reg */
static CCPrepare gen_prepare_eflags_o(DisasContext *s, TCGv reg)
{
    gen_compute_eflags(s);
    return (CCPrepare) { .cond = TCG_COND_NE, .reg = cpu_cc_src,
                         .mask = CC_O };
}

/* compute eflags.Z to reg */
static CCPrepare gen_prepare_eflags_z(DisasContext *s, TCGv reg)
{
    switch (s->cc_op) {
    case CC_OP_DYNAMIC:
        gen_compute_eflags(s);
        /* FALLTHRU */
    case CC_OP_EFLAGS:
        return (CCPrepare) { .cond = TCG_COND_NE, .reg = cpu_cc_src,
                             .mask = CC_Z };
    default:
        {
            int size = (s->cc_op - CC_OP_ADDB) & 3;
            TCGv t0 = gen_ext_tl(reg, cpu_cc_dst, size, false);
            return (CCPrepare) { .cond = TCG_COND_EQ, .reg = t0, .mask = -1 };
        }
    }
}

/* perform a conditional store into register 'reg' according to jump opcode
   value 'b'. In the fast case, T0 is guaranted not to be used. */
static CCPrepare gen_prepare_cc(DisasContext *s, int b, TCGv reg)
{
    int inv, jcc_op, size, cond;
    CCPrepare cc;
    TCGv t0;

    inv = b & 1;
    jcc_op = (b >> 1) & 7;

    switch (s->cc_op) {
    case CC_OP_SUBB ... CC_OP_SUBQ:
        /* We optimize relational operators for the cmp/jcc case.  */
        size = s->cc_op - CC_OP_SUBB;
        switch (jcc_op) {
        case JCC_BE:
            tcg_gen_mov_tl(cpu_tmp4, cpu_cc_srcT);
            gen_extu(size, cpu_tmp4);
            t0 = gen_ext_tl(cpu_tmp0, cpu_cc_src, size, false);
            cc = (CCPrepare) { .cond = TCG_COND_LEU, .reg = cpu_tmp4,
                               .reg2 = t0, .mask = -1, .use_reg2 = true };
            break;

        case JCC_L:
            cond = TCG_COND_LT;
            goto fast_jcc_l;
        case JCC_LE:
            cond = TCG_COND_LE;
        fast_jcc_l:
            tcg_gen_mov_tl(cpu_tmp4, cpu_cc_srcT);
            gen_exts(size, cpu_tmp4);
            t0 = gen_ext_tl(cpu_tmp0, cpu_cc_src, size, true);
            cc = (CCPrepare) { .cond = cond, .reg = cpu_tmp4,
                               .reg2 = t0, .mask = -1, .use_reg2 = true };
            break;

        default:
            goto slow_jcc;
        }
        break;

    default:
    slow_jcc:
        /* This actually generates good code for JC, JZ and JS.  */
        switch (jcc_op) {
        case JCC_O:
            cc = gen_prepare_eflags_o(s, reg);
            break;
        case JCC_B:
            cc = gen_prepare_eflags_c(s, reg);
            break;
        case JCC_Z:
            cc = gen_prepare_eflags_z(s, reg);
            break;
        case JCC_BE:
            gen_compute_eflags(s);
            cc = (CCPrepare) { .cond = TCG_COND_NE, .reg = cpu_cc_src,
                               .mask = CC_Z | CC_C };
            break;
        case JCC_S:
            cc = gen_prepare_eflags_s(s, reg);
            break;
        case JCC_P:
            cc = gen_prepare_eflags_p(s, reg);
            break;
        case JCC_L:
            gen_compute_eflags(s);
            if (TCGV_EQUAL(reg, cpu_cc_src)) {
                reg = cpu_tmp0;
            }
            tcg_gen_shri_tl(reg, cpu_cc_src, 4); /* CC_O -> CC_S */
            tcg_gen_xor_tl(reg, reg, cpu_cc_src);
            cc = (CCPrepare) { .cond = TCG_COND_NE, .reg = reg,
                               .mask = CC_S };
            break;
        default:
        case JCC_LE:
            gen_compute_eflags(s);
            if (TCGV_EQUAL(reg, cpu_cc_src)) {
                reg = cpu_tmp0;
            }
            tcg_gen_shri_tl(reg, cpu_cc_src, 4); /* CC_O -> CC_S */
            tcg_gen_xor_tl(reg, reg, cpu_cc_src);
            cc = (CCPrepare) { .cond = TCG_COND_NE, .reg = reg,
                               .mask = CC_S | CC_Z };
            break;
        }
        break;
    }

    if (inv) {
        cc.cond = tcg_invert_cond(cc.cond);
    }
    return cc;
}

static void gen_setcc1(DisasContext *s, int b, TCGv reg)
{
    CCPrepare cc = gen_prepare_cc(s, b, reg);

    if (cc.no_setcond) {
        if (cc.cond == TCG_COND_EQ) {
            tcg_gen_xori_tl(reg, cc.reg, 1);
        } else {
            tcg_gen_mov_tl(reg, cc.reg);
        }
        return;
    }

    if (cc.cond == TCG_COND_NE && !cc.use_reg2 && cc.imm == 0 &&
        cc.mask != 0 && (cc.mask & (cc.mask - 1)) == 0) {
        tcg_gen_shri_tl(reg, cc.reg, ctztl(cc.mask));
        tcg_gen_andi_tl(reg, reg, 1);
        return;
    }
    if (cc.mask != -1) {
        tcg_gen_andi_tl(reg, cc.reg, cc.mask);
        cc.reg = reg;
    }
    if (cc.use_reg2) {
        tcg_gen_setcond_tl(cc.cond, reg, cc.reg, cc.reg2);
    } else {
        tcg_gen_setcondi_tl(cc.cond, reg, cc.reg, cc.imm);
    }
}

static inline void gen_compute_eflags_c(DisasContext *s, TCGv reg)
{
    gen_setcc1(s, JCC_B << 1, reg);
}

/* generate a conditional jump to label 'l1' according to jump opcode
   value 'b'. In the fast case, T0 is guaranted not to be used. */
static inline void gen_jcc1_noeob(DisasContext *s, int b, int l1)
{
    CCPrepare cc = gen_prepare_cc(s, b, cpu_T[0]);

    if (cc.mask != -1) {
        tcg_gen_andi_tl(cpu_T[0], cc.reg, cc.mask);
        cc.reg = cpu_T[0];
    }
    if (cc.use_reg2) {
        tcg_gen_brcond_tl(cc.cond, cc.reg, cc.reg2, l1);
    } else {
        tcg_gen_brcondi_tl(cc.cond, cc.reg, cc.imm, l1);
    }
}

/* Generate a conditional jump to label 'l1' according to jump opcode
   value 'b'. In the fast case, T0 is guaranted not to be used.
   A translation block must end soon.  */
static inline void gen_jcc1(DisasContext *s, int b, int l1)
{
    CCPrepare cc = gen_prepare_cc(s, b, cpu_T[0]);

    gen_update_cc_op(s);
    if (cc.mask != -1) {
        tcg_gen_andi_tl(cpu_T[0], cc.reg, cc.mask);
        cc.reg = cpu_T[0];
    }
    set_cc_op(s, CC_OP_DYNAMIC);
    if (cc.use_reg2) {
        tcg_gen_brcond_tl(cc.cond, cc.reg, cc.reg2, l1);
    } else {
        tcg_gen_brcondi_tl(cc.cond, cc.reg, cc.imm, l1);
    }
}

/* XXX: does not work with gdbstub "ice" single step - not a
   serious problem */
static int gen_jz_ecx_string(DisasContext *s, target_ulong next_eip)
{
    int l1, l2;

    l1 = gen_new_label();
    l2 = gen_new_label();
    gen_op_jnz_ecx(s->aflag, l1);
    gen_set_label(l2);
    gen_jmp_tb(s, next_eip, 1);
    gen_set_label(l1);
    return l2;
}

static inline void gen_stos(DisasContext *s, int ot)
{
    gen_op_mov_TN_reg(OT_LONG, 0, R_EAX);
    gen_string_movl_A0_EDI(s);
    gen_op_st_T0_A0(ot + s->mem_index);
    gen_op_movl_T0_Dshift(ot);
    gen_op_add_reg_T0(s->aflag, R_EDI);
}

static inline void gen_lods(DisasContext *s, int ot)
{
    gen_string_movl_A0_ESI(s);
    gen_op_ld_T0_A0(ot + s->mem_index);
    gen_op_mov_reg_T0(ot, R_EAX);
    gen_op_movl_T0_Dshift(ot);
    gen_op_add_reg_T0(s->aflag, R_ESI);
}

static inline void gen_scas(DisasContext *s, int ot)
{
    gen_string_movl_A0_EDI(s);
    gen_op_ld_T1_A0(ot + s->mem_index);
    gen_op(s, OP_CMPL, ot, R_EAX);
    gen_op_movl_T0_Dshift(ot);
    gen_op_add_reg_T0(s->aflag, R_EDI);
}

static inline void gen_cmps(DisasContext *s, int ot)
{
    gen_string_movl_A0_EDI(s);
    gen_op_ld_T1_A0(ot + s->mem_index);
    gen_string_movl_A0_ESI(s);
    gen_op(s, OP_CMPL, ot, OR_TMP0);
    gen_op_movl_T0_Dshift(ot);
    gen_op_add_reg_T0(s->aflag, R_ESI);
    gen_op_add_reg_T0(s->aflag, R_EDI);
}

static inline void gen_ins(DisasContext *s, int ot)
{
    if (use_icount)
        gen_io_start();
    gen_string_movl_A0_EDI(s);
    /* Note: we must do this dummy write first to be restartable in
       case of page fault. */
    gen_op_movl_T0_0();
    gen_op_st_T0_A0(ot + s->mem_index);
    gen_op_mov_TN_reg(OT_WORD, 1, R_EDX);
    tcg_gen_trunc_tl_i32(cpu_tmp2_i32, cpu_T[1]);
    tcg_gen_andi_i32(cpu_tmp2_i32, cpu_tmp2_i32, 0xffff);
    gen_helper_in_func(ot, cpu_T[0], cpu_tmp2_i32);
    gen_op_st_T0_A0(ot + s->mem_index);
    gen_op_movl_T0_Dshift(ot);
    gen_op_add_reg_T0(s->aflag, R_EDI);
    if (use_icount)
        gen_io_end();
}

static inline void gen_outs(DisasContext *s, int ot)
{
    if (use_icount)
        gen_io_start();
    gen_string_movl_A0_ESI(s);
    gen_op_ld_T0_A0(ot + s->mem_index);

    gen_op_mov_TN_reg(OT_WORD, 1, R_EDX);
    tcg_gen_trunc_tl_i32(cpu_tmp2_i32, cpu_T[1]);
    tcg_gen_andi_i32(cpu_tmp2_i32, cpu_tmp2_i32, 0xffff);
    tcg_gen_trunc_tl_i32(cpu_tmp3_i32, cpu_T[0]);
    gen_helper_out_func(ot, cpu_tmp2_i32, cpu_tmp3_i32);

    gen_op_movl_T0_Dshift(ot);
    gen_op_add_reg_T0(s->aflag, R_ESI);
    if (use_icount)
        gen_io_end();
}

/* same method as Valgrind : we generate jumps to current or next
   instruction */
#define GEN_REPZ(op)                                                          \
static inline void gen_repz_ ## op(DisasContext *s, int ot,                   \
                                 target_ulong cur_eip, target_ulong next_eip) \
{                                                                             \
    int l2;\
    gen_update_cc_op(s);                                                      \
    l2 = gen_jz_ecx_string(s, next_eip);                                      \
    gen_ ## op(s, ot);                                                        \
    gen_op_add_reg_im(s->aflag, R_ECX, -1);                                   \
    /* a loop would cause two single step exceptions if ECX = 1               \
       before rep string_insn */                                              \
    if (!s->jmp_opt)                                                          \
        gen_op_jz_ecx(s->aflag, l2);                                          \
    gen_jmp(s, cur_eip);                                                      \
}

#define GEN_REPZ2(op)                                                         \
static inline void gen_repz_ ## op(DisasContext *s, int ot,                   \
                                   target_ulong cur_eip,                      \
                                   target_ulong next_eip,                     \
                                   int nz)                                    \
{                                                                             \
    int l2;\
    gen_update_cc_op(s);                                                      \
    l2 = gen_jz_ecx_string(s, next_eip);                                      \
    gen_ ## op(s, ot);                                                        \
    gen_op_add_reg_im(s->aflag, R_ECX, -1);                                   \
    gen_update_cc_op(s);                                                      \
    gen_jcc1(s, (JCC_Z << 1) | (nz ^ 1), l2);                                 \
    if (!s->jmp_opt)                                                          \
        gen_op_jz_ecx(s->aflag, l2);                                          \
    gen_jmp(s, cur_eip);                                                      \
}

GEN_REPZ(movs)
GEN_REPZ(stos)
GEN_REPZ(lods)
GEN_REPZ(ins)
GEN_REPZ(outs)
GEN_REPZ2(scas)
GEN_REPZ2(cmps)

static void gen_helper_fp_arith_ST0_FT0(int op)
{
    switch (op) {
    case 0:
        gen_helper_fadd_ST0_FT0(cpu_env);
        break;
    case 1:
        gen_helper_fmul_ST0_FT0(cpu_env);
        break;
    case 2:
        gen_helper_fcom_ST0_FT0(cpu_env);
        break;
    case 3:
        gen_helper_fcom_ST0_FT0(cpu_env);
        break;
    case 4:
        gen_helper_fsub_ST0_FT0(cpu_env);
        break;
    case 5:
        gen_helper_fsubr_ST0_FT0(cpu_env);
        break;
    case 6:
        gen_helper_fdiv_ST0_FT0(cpu_env);
        break;
    case 7:
        gen_helper_fdivr_ST0_FT0(cpu_env);
        break;
    }
}

/* NOTE the exception in "r" op ordering */
static void gen_helper_fp_arith_STN_ST0(int op, int opreg)
{
    TCGv_i32 tmp = tcg_const_i32(opreg);
    switch (op) {
    case 0:
        gen_helper_fadd_STN_ST0(cpu_env, tmp);
        break;
    case 1:
        gen_helper_fmul_STN_ST0(cpu_env, tmp);
        break;
    case 4:
        gen_helper_fsubr_STN_ST0(cpu_env, tmp);
        break;
    case 5:
        gen_helper_fsub_STN_ST0(cpu_env, tmp);
        break;
    case 6:
        gen_helper_fdivr_STN_ST0(cpu_env, tmp);
        break;
    case 7:
        gen_helper_fdiv_STN_ST0(cpu_env, tmp);
        break;
    }
}

/* if d == OR_TMP0, it means memory operand (address in A0) */
static void gen_op(DisasContext *s1, int op, int ot, int d)
{
    if (d != OR_TMP0) {
        gen_op_mov_TN_reg(ot, 0, d);
    } else {
        gen_op_ld_T0_A0(ot + s1->mem_index);
    }
    switch(op) {
    case OP_ADCL:
        gen_compute_eflags_c(s1, cpu_tmp4);
        tcg_gen_add_tl(cpu_T[0], cpu_T[0], cpu_T[1]);
        tcg_gen_add_tl(cpu_T[0], cpu_T[0], cpu_tmp4);
        if (d != OR_TMP0)
            gen_op_mov_reg_T0(ot, d);
        else
            gen_op_st_T0_A0(ot + s1->mem_index);
        tcg_gen_mov_tl(cpu_cc_src, cpu_T[1]);
        tcg_gen_mov_tl(cpu_cc_dst, cpu_T[0]);
        tcg_gen_trunc_tl_i32(cpu_tmp2_i32, cpu_tmp4);
        tcg_gen_shli_i32(cpu_tmp2_i32, cpu_tmp2_i32, 2);
        tcg_gen_addi_i32(cpu_cc_op, cpu_tmp2_i32, CC_OP_ADDB + ot);
        set_cc_op(s1, CC_OP_DYNAMIC);
        break;
    case OP_SBBL:
        /*
         * No need to store cpu_cc_srcT, because it is used only
         * when the cc_op is known.
         */
        gen_compute_eflags_c(s1, cpu_tmp4);
        tcg_gen_sub_tl(cpu_T[0], cpu_T[0], cpu_T[1]);
        tcg_gen_sub_tl(cpu_T[0], cpu_T[0], cpu_tmp4);
        if (d != OR_TMP0)
            gen_op_mov_reg_T0(ot, d);
        else
            gen_op_st_T0_A0(ot + s1->mem_index);
        tcg_gen_mov_tl(cpu_cc_src, cpu_T[1]);
        tcg_gen_mov_tl(cpu_cc_dst, cpu_T[0]);
        tcg_gen_trunc_tl_i32(cpu_tmp2_i32, cpu_tmp4);
        tcg_gen_shli_i32(cpu_tmp2_i32, cpu_tmp2_i32, 2);
        tcg_gen_addi_i32(cpu_cc_op, cpu_tmp2_i32, CC_OP_SUBB + ot);
        set_cc_op(s1, CC_OP_DYNAMIC);
        break;
    case OP_ADDL:
        gen_op_addl_T0_T1();
        if (d != OR_TMP0)
            gen_op_mov_reg_T0(ot, d);
        else
            gen_op_st_T0_A0(ot + s1->mem_index);
        gen_op_update2_cc();
        set_cc_op(s1, CC_OP_ADDB + ot);
        break;
    case OP_SUBL:
        tcg_gen_mov_tl(cpu_cc_srcT, cpu_T[0]);
        tcg_gen_sub_tl(cpu_T[0], cpu_T[0], cpu_T[1]);
        if (d != OR_TMP0)
            gen_op_mov_reg_T0(ot, d);
        else
            gen_op_st_T0_A0(ot + s1->mem_index);
        gen_op_update2_cc();
        set_cc_op(s1, CC_OP_SUBB + ot);
        break;
    default:
    case OP_ANDL:
        tcg_gen_and_tl(cpu_T[0], cpu_T[0], cpu_T[1]);
        if (d != OR_TMP0)
            gen_op_mov_reg_T0(ot, d);
        else
            gen_op_st_T0_A0(ot + s1->mem_index);
        gen_op_update1_cc();
        set_cc_op(s1, CC_OP_LOGICB + ot);
        break;
    case OP_ORL:
        tcg_gen_or_tl(cpu_T[0], cpu_T[0], cpu_T[1]);
        if (d != OR_TMP0)
            gen_op_mov_reg_T0(ot, d);
        else
            gen_op_st_T0_A0(ot + s1->mem_index);
        gen_op_update1_cc();
        set_cc_op(s1, CC_OP_LOGICB + ot);
        break;
    case OP_XORL:
        tcg_gen_xor_tl(cpu_T[0], cpu_T[0], cpu_T[1]);
        if (d != OR_TMP0)
            gen_op_mov_reg_T0(ot, d);
        else
            gen_op_st_T0_A0(ot + s1->mem_index);
        gen_op_update1_cc();
        set_cc_op(s1, CC_OP_LOGICB + ot);
        break;
    case OP_CMPL:
        tcg_gen_mov_tl(cpu_cc_src, cpu_T[1]);
        tcg_gen_mov_tl(cpu_cc_srcT, cpu_T[0]);
        tcg_gen_sub_tl(cpu_cc_dst, cpu_T[0], cpu_T[1]);
        set_cc_op(s1, CC_OP_SUBB + ot);
        break;
    }
}

/* if d == OR_TMP0, it means memory operand (address in A0) */
static void gen_inc(DisasContext *s1, int ot, int d, int c)
{
    if (d != OR_TMP0)
        gen_op_mov_TN_reg(ot, 0, d);
    else
        gen_op_ld_T0_A0(ot + s1->mem_index);
    gen_compute_eflags_c(s1, cpu_cc_src);
    if (c > 0) {
        tcg_gen_addi_tl(cpu_T[0], cpu_T[0], 1);
        set_cc_op(s1, CC_OP_INCB + ot);
    } else {
        tcg_gen_addi_tl(cpu_T[0], cpu_T[0], -1);
        set_cc_op(s1, CC_OP_DECB + ot);
    }
    if (d != OR_TMP0)
        gen_op_mov_reg_T0(ot, d);
    else
        gen_op_st_T0_A0(ot + s1->mem_index);
    tcg_gen_mov_tl(cpu_cc_dst, cpu_T[0]);
}

static void gen_shift_rm_T1(DisasContext *s, int ot, int op1, 
                            int is_right, int is_arith)
{
    target_ulong mask;
    int shift_label;
    TCGv t0, t1, t2;

    if (ot == OT_QUAD) {
        mask = 0x3f;
    } else {
        mask = 0x1f;
    }

    /* load */
    if (op1 == OR_TMP0) {
        gen_op_ld_T0_A0(ot + s->mem_index);
    } else {
        gen_op_mov_TN_reg(ot, 0, op1);
    }

    t0 = tcg_temp_local_new();
    t1 = tcg_temp_local_new();
    t2 = tcg_temp_local_new();

    tcg_gen_andi_tl(t2, cpu_T[1], mask);

    if (is_right) {
        if (is_arith) {
            gen_exts(ot, cpu_T[0]);
            tcg_gen_mov_tl(t0, cpu_T[0]);
            tcg_gen_sar_tl(cpu_T[0], cpu_T[0], t2);
        } else {
            gen_extu(ot, cpu_T[0]);
            tcg_gen_mov_tl(t0, cpu_T[0]);
            tcg_gen_shr_tl(cpu_T[0], cpu_T[0], t2);
        }
    } else {
        tcg_gen_mov_tl(t0, cpu_T[0]);
        tcg_gen_shl_tl(cpu_T[0], cpu_T[0], t2);
    }

    /* store */
    if (op1 == OR_TMP0) {
        gen_op_st_T0_A0(ot + s->mem_index);
    } else {
        gen_op_mov_reg_T0(ot, op1);
    }

    /* Update eflags data because we cannot predict flags afterward.  */
    gen_update_cc_op(s);
    set_cc_op(s, CC_OP_DYNAMIC);

    tcg_gen_mov_tl(t1, cpu_T[0]);

    shift_label = gen_new_label();
    tcg_gen_brcondi_tl(TCG_COND_EQ, t2, 0, shift_label);

    tcg_gen_addi_tl(t2, t2, -1);
    tcg_gen_mov_tl(cpu_cc_dst, t1);

    if (is_right) {
        if (is_arith) {
            tcg_gen_sar_tl(cpu_cc_src, t0, t2);
        } else {
            tcg_gen_shr_tl(cpu_cc_src, t0, t2);
        }
    } else {
        tcg_gen_shl_tl(cpu_cc_src, t0, t2);
    }

    if (is_right) {
        tcg_gen_movi_i32(cpu_cc_op, CC_OP_SARB + ot);
    } else {
        tcg_gen_movi_i32(cpu_cc_op, CC_OP_SHLB + ot);
    }

    gen_set_label(shift_label);

    tcg_temp_free(t0);
    tcg_temp_free(t1);
    tcg_temp_free(t2);
}

static void gen_shift_rm_im(DisasContext *s, int ot, int op1, int op2,
                            int is_right, int is_arith)
{
    int mask;
    
    if (ot == OT_QUAD)
        mask = 0x3f;
    else
        mask = 0x1f;

    /* load */
    if (op1 == OR_TMP0)
        gen_op_ld_T0_A0(ot + s->mem_index);
    else
        gen_op_mov_TN_reg(ot, 0, op1);

    op2 &= mask;
    if (op2 != 0) {
        if (is_right) {
            if (is_arith) {
                gen_exts(ot, cpu_T[0]);
                tcg_gen_sari_tl(cpu_tmp4, cpu_T[0], op2 - 1);
                tcg_gen_sari_tl(cpu_T[0], cpu_T[0], op2);
            } else {
                gen_extu(ot, cpu_T[0]);
                tcg_gen_shri_tl(cpu_tmp4, cpu_T[0], op2 - 1);
                tcg_gen_shri_tl(cpu_T[0], cpu_T[0], op2);
            }
        } else {
            tcg_gen_shli_tl(cpu_tmp4, cpu_T[0], op2 - 1);
            tcg_gen_shli_tl(cpu_T[0], cpu_T[0], op2);
        }
    }

    /* store */
    if (op1 == OR_TMP0)
        gen_op_st_T0_A0(ot + s->mem_index);
    else
        gen_op_mov_reg_T0(ot, op1);
        
    /* update eflags if non zero shift */
    if (op2 != 0) {
        tcg_gen_mov_tl(cpu_cc_src, cpu_tmp4);
        tcg_gen_mov_tl(cpu_cc_dst, cpu_T[0]);
        set_cc_op(s, (is_right ? CC_OP_SARB : CC_OP_SHLB) + ot);
    }
}

static inline void tcg_gen_lshift(TCGv ret, TCGv arg1, target_long arg2)
{
    if (arg2 >= 0)
        tcg_gen_shli_tl(ret, arg1, arg2);
    else
        tcg_gen_shri_tl(ret, arg1, -arg2);
}

static void gen_rot_rm_T1(DisasContext *s, int ot, int op1, 
                          int is_right)
{
    target_ulong mask;
    int label1, label2, data_bits;
    TCGv t0, t1, t2, a0;

    /* XXX: inefficient, but we must use local temps */
    t0 = tcg_temp_local_new();
    t1 = tcg_temp_local_new();
    t2 = tcg_temp_local_new();
    a0 = tcg_temp_local_new();

    if (ot == OT_QUAD)
        mask = 0x3f;
    else
        mask = 0x1f;

    /* load */
    if (op1 == OR_TMP0) {
        tcg_gen_mov_tl(a0, cpu_A0);
        gen_op_ld_v(ot + s->mem_index, t0, a0);
    } else {
        gen_op_mov_v_reg(ot, t0, op1);
    }

    tcg_gen_mov_tl(t1, cpu_T[1]);

    tcg_gen_andi_tl(t1, t1, mask);

    /* Must test zero case to avoid using undefined behaviour in TCG
       shifts. */
    label1 = gen_new_label();
    tcg_gen_brcondi_tl(TCG_COND_EQ, t1, 0, label1);
    
    if (ot <= OT_WORD)
        tcg_gen_andi_tl(cpu_tmp0, t1, (1 << (3 + ot)) - 1);
    else
        tcg_gen_mov_tl(cpu_tmp0, t1);
    
    gen_extu(ot, t0);
    tcg_gen_mov_tl(t2, t0);

    data_bits = 8 << ot;
    /* XXX: rely on behaviour of shifts when operand 2 overflows (XXX:
       fix TCG definition) */
    if (is_right) {
        tcg_gen_shr_tl(cpu_tmp4, t0, cpu_tmp0);
        tcg_gen_subfi_tl(cpu_tmp0, data_bits, cpu_tmp0);
        tcg_gen_shl_tl(t0, t0, cpu_tmp0);
    } else {
        tcg_gen_shl_tl(cpu_tmp4, t0, cpu_tmp0);
        tcg_gen_subfi_tl(cpu_tmp0, data_bits, cpu_tmp0);
        tcg_gen_shr_tl(t0, t0, cpu_tmp0);
    }
    tcg_gen_or_tl(t0, t0, cpu_tmp4);

    gen_set_label(label1);
    /* store */
    if (op1 == OR_TMP0) {
        gen_op_st_v(ot + s->mem_index, t0, a0);
    } else {
        gen_op_mov_reg_v(ot, op1, t0);
    }
    
    /* update eflags.  It is needed anyway most of the time, do it always.  */
    gen_compute_eflags(s);
    assert(s->cc_op == CC_OP_EFLAGS);

    label2 = gen_new_label();
    tcg_gen_brcondi_tl(TCG_COND_EQ, t1, 0, label2);

    tcg_gen_andi_tl(cpu_cc_src, cpu_cc_src, ~(CC_O | CC_C));
    tcg_gen_xor_tl(cpu_tmp0, t2, t0);
    tcg_gen_lshift(cpu_tmp0, cpu_tmp0, 11 - (data_bits - 1));
    tcg_gen_andi_tl(cpu_tmp0, cpu_tmp0, CC_O);
    tcg_gen_or_tl(cpu_cc_src, cpu_cc_src, cpu_tmp0);
    if (is_right) {
        tcg_gen_shri_tl(t0, t0, data_bits - 1);
    }
    tcg_gen_andi_tl(t0, t0, CC_C);
    tcg_gen_or_tl(cpu_cc_src, cpu_cc_src, t0);

    gen_set_label(label2);

    tcg_temp_free(t0);
    tcg_temp_free(t1);
    tcg_temp_free(t2);
    tcg_temp_free(a0);
}

static void gen_rot_rm_im(DisasContext *s, int ot, int op1, int op2,
                          int is_right)
{
    int mask;
    int data_bits;
    TCGv t0, t1, a0;

    /* XXX: inefficient, but we must use local temps */
    t0 = tcg_temp_local_new();
    t1 = tcg_temp_local_new();
    a0 = tcg_temp_local_new();

    if (ot == OT_QUAD)
        mask = 0x3f;
    else
        mask = 0x1f;

    /* load */
    if (op1 == OR_TMP0) {
        tcg_gen_mov_tl(a0, cpu_A0);
        gen_op_ld_v(ot + s->mem_index, t0, a0);
    } else {
        gen_op_mov_v_reg(ot, t0, op1);
    }

    gen_extu(ot, t0);
    tcg_gen_mov_tl(t1, t0);

    op2 &= mask;
    data_bits = 8 << ot;
    if (op2 != 0) {
        int shift = op2 & ((1 << (3 + ot)) - 1);
        if (is_right) {
            tcg_gen_shri_tl(cpu_tmp4, t0, shift);
            tcg_gen_shli_tl(t0, t0, data_bits - shift);
        }
        else {
            tcg_gen_shli_tl(cpu_tmp4, t0, shift);
            tcg_gen_shri_tl(t0, t0, data_bits - shift);
        }
        tcg_gen_or_tl(t0, t0, cpu_tmp4);
    }

    /* store */
    if (op1 == OR_TMP0) {
        gen_op_st_v(ot + s->mem_index, t0, a0);
    } else {
        gen_op_mov_reg_v(ot, op1, t0);
    }

    if (op2 != 0) {
        /* update eflags */
        gen_compute_eflags(s);
        assert(s->cc_op == CC_OP_EFLAGS);

        tcg_gen_andi_tl(cpu_cc_src, cpu_cc_src, ~(CC_O | CC_C));
        tcg_gen_xor_tl(cpu_tmp0, t1, t0);
        tcg_gen_lshift(cpu_tmp0, cpu_tmp0, 11 - (data_bits - 1));
        tcg_gen_andi_tl(cpu_tmp0, cpu_tmp0, CC_O);
        tcg_gen_or_tl(cpu_cc_src, cpu_cc_src, cpu_tmp0);
        if (is_right) {
            tcg_gen_shri_tl(t0, t0, data_bits - 1);
        }
        tcg_gen_andi_tl(t0, t0, CC_C);
        tcg_gen_or_tl(cpu_cc_src, cpu_cc_src, t0);
    }

    tcg_temp_free(t0);
    tcg_temp_free(t1);
    tcg_temp_free(a0);
}

/* XXX: add faster immediate = 1 case */
static void gen_rotc_rm_T1(DisasContext *s, int ot, int op1, 
                           int is_right)
{
    gen_compute_eflags(s);
    assert(s->cc_op == CC_OP_EFLAGS);

    /* load */
    if (op1 == OR_TMP0)
        gen_op_ld_T0_A0(ot + s->mem_index);
    else
        gen_op_mov_TN_reg(ot, 0, op1);
    
    if (is_right) {
        switch (ot) {
        case OT_BYTE:
            gen_helper_rcrb(cpu_T[0], cpu_env, cpu_T[0], cpu_T[1]);
            break;
        case OT_WORD:
            gen_helper_rcrw(cpu_T[0], cpu_env, cpu_T[0], cpu_T[1]);
            break;
        case OT_LONG:
            gen_helper_rcrl(cpu_T[0], cpu_env, cpu_T[0], cpu_T[1]);
            break;
#ifdef TARGET_X86_64
        case OT_QUAD:
            gen_helper_rcrq(cpu_T[0], cpu_env, cpu_T[0], cpu_T[1]);
            break;
#endif
        }
    } else {
        switch (ot) {
        case OT_BYTE:
            gen_helper_rclb(cpu_T[0], cpu_env, cpu_T[0], cpu_T[1]);
            break;
        case OT_WORD:
            gen_helper_rclw(cpu_T[0], cpu_env, cpu_T[0], cpu_T[1]);
            break;
        case OT_LONG:
            gen_helper_rcll(cpu_T[0], cpu_env, cpu_T[0], cpu_T[1]);
            break;
#ifdef TARGET_X86_64
        case OT_QUAD:
            gen_helper_rclq(cpu_T[0], cpu_env, cpu_T[0], cpu_T[1]);
            break;
#endif
        }
    }
    /* store */
    if (op1 == OR_TMP0)
        gen_op_st_T0_A0(ot + s->mem_index);
    else
        gen_op_mov_reg_T0(ot, op1);
}

/* XXX: add faster immediate case */
static void gen_shiftd_rm_T1(DisasContext *s, int ot, int op1,
                             int is_right, TCGv count)
{
    int label1, label2, data_bits;
    target_ulong mask;
    TCGv t0, t1, t2, a0;

    t0 = tcg_temp_local_new();
    t1 = tcg_temp_local_new();
    t2 = tcg_temp_local_new();
    a0 = tcg_temp_local_new();

    if (ot == OT_QUAD)
        mask = 0x3f;
    else
        mask = 0x1f;

    /* load */
    if (op1 == OR_TMP0) {
        tcg_gen_mov_tl(a0, cpu_A0);
        gen_op_ld_v(ot + s->mem_index, t0, a0);
    } else {
        gen_op_mov_v_reg(ot, t0, op1);
    }

    tcg_gen_andi_tl(t2, count, mask);
    tcg_gen_mov_tl(t1, cpu_T[1]);

    /* Must test zero case to avoid using undefined behaviour in TCG
       shifts. */
    label1 = gen_new_label();
    tcg_gen_brcondi_tl(TCG_COND_EQ, t2, 0, label1);
    
    tcg_gen_addi_tl(cpu_tmp5, t2, -1);
    if (ot == OT_WORD) {
        /* Note: we implement the Intel behaviour for shift count > 16 */
        if (is_right) {
            tcg_gen_andi_tl(t0, t0, 0xffff);
            tcg_gen_shli_tl(cpu_tmp0, t1, 16);
            tcg_gen_or_tl(t0, t0, cpu_tmp0);
            tcg_gen_ext32u_tl(t0, t0);

            tcg_gen_shr_tl(cpu_tmp4, t0, cpu_tmp5);
            
            /* only needed if count > 16, but a test would complicate */
            tcg_gen_subfi_tl(cpu_tmp5, 32, t2);
            tcg_gen_shl_tl(cpu_tmp0, t0, cpu_tmp5);

            tcg_gen_shr_tl(t0, t0, t2);

            tcg_gen_or_tl(t0, t0, cpu_tmp0);
        } else {
            /* XXX: not optimal */
            tcg_gen_andi_tl(t0, t0, 0xffff);
            tcg_gen_shli_tl(t1, t1, 16);
            tcg_gen_or_tl(t1, t1, t0);
            tcg_gen_ext32u_tl(t1, t1);
            
            tcg_gen_shl_tl(cpu_tmp4, t0, cpu_tmp5);
            tcg_gen_subfi_tl(cpu_tmp0, 32, cpu_tmp5);
            tcg_gen_shr_tl(cpu_tmp5, t1, cpu_tmp0);
            tcg_gen_or_tl(cpu_tmp4, cpu_tmp4, cpu_tmp5);

            tcg_gen_shl_tl(t0, t0, t2);
            tcg_gen_subfi_tl(cpu_tmp5, 32, t2);
            tcg_gen_shr_tl(t1, t1, cpu_tmp5);
            tcg_gen_or_tl(t0, t0, t1);
        }
    } else {
        data_bits = 8 << ot;
        if (is_right) {
            if (ot == OT_LONG)
                tcg_gen_ext32u_tl(t0, t0);

            tcg_gen_shr_tl(cpu_tmp4, t0, cpu_tmp5);

            tcg_gen_shr_tl(t0, t0, t2);
            tcg_gen_subfi_tl(cpu_tmp5, data_bits, t2);
            tcg_gen_shl_tl(t1, t1, cpu_tmp5);
            tcg_gen_or_tl(t0, t0, t1);
            
        } else {
            if (ot == OT_LONG)
                tcg_gen_ext32u_tl(t1, t1);

            tcg_gen_shl_tl(cpu_tmp4, t0, cpu_tmp5);
            
            tcg_gen_shl_tl(t0, t0, t2);
            tcg_gen_subfi_tl(cpu_tmp5, data_bits, t2);
            tcg_gen_shr_tl(t1, t1, cpu_tmp5);
            tcg_gen_or_tl(t0, t0, t1);
        }
    }
    tcg_gen_mov_tl(t1, cpu_tmp4);

    gen_set_label(label1);
    /* store */
    if (op1 == OR_TMP0) {
        gen_op_st_v(ot + s->mem_index, t0, a0);
    } else {
        gen_op_mov_reg_v(ot, op1, t0);
    }
    
    /* Update eflags data because we cannot predict flags afterward.  */
    gen_update_cc_op(s);
    set_cc_op(s, CC_OP_DYNAMIC);

    label2 = gen_new_label();
    tcg_gen_brcondi_tl(TCG_COND_EQ, t2, 0, label2);

    tcg_gen_mov_tl(cpu_cc_src, t1);
    tcg_gen_mov_tl(cpu_cc_dst, t0);
    if (is_right) {
        tcg_gen_movi_i32(cpu_cc_op, CC_OP_SARB + ot);
    } else {
        tcg_gen_movi_i32(cpu_cc_op, CC_OP_SHLB + ot);
    }
    gen_set_label(label2);

    tcg_temp_free(t0);
    tcg_temp_free(t1);
    tcg_temp_free(t2);
    tcg_temp_free(a0);
}

static void gen_shift(DisasContext *s1, int op, int ot, int d, int s)
{
    if (s != OR_TMP1)
        gen_op_mov_TN_reg(ot, 1, s);
    switch(op) {
    case OP_ROL:
        gen_rot_rm_T1(s1, ot, d, 0);
        break;
    case OP_ROR:
        gen_rot_rm_T1(s1, ot, d, 1);
        break;
    case OP_SHL:
    case OP_SHL1:
        gen_shift_rm_T1(s1, ot, d, 0, 0);
        break;
    case OP_SHR:
        gen_shift_rm_T1(s1, ot, d, 1, 0);
        break;
    case OP_SAR:
        gen_shift_rm_T1(s1, ot, d, 1, 1);
        break;
    case OP_RCL:
        gen_rotc_rm_T1(s1, ot, d, 0);
        break;
    case OP_RCR:
        gen_rotc_rm_T1(s1, ot, d, 1);
        break;
    }
}

static void gen_shifti(DisasContext *s1, int op, int ot, int d, int c)
{
    switch(op) {
    case OP_ROL:
        gen_rot_rm_im(s1, ot, d, c, 0);
        break;
    case OP_ROR:
        gen_rot_rm_im(s1, ot, d, c, 1);
        break;
    case OP_SHL:
    case OP_SHL1:
        gen_shift_rm_im(s1, ot, d, c, 0, 0);
        break;
    case OP_SHR:
        gen_shift_rm_im(s1, ot, d, c, 1, 0);
        break;
    case OP_SAR:
        gen_shift_rm_im(s1, ot, d, c, 1, 1);
        break;
    default:
        /* currently not optimized */
        gen_op_movl_T1_im(c);
        gen_shift(s1, op, ot, d, OR_TMP1);
        break;
    }
}

static void gen_lea_modrm(CPUX86State *env, DisasContext *s, int modrm,
                          int *reg_ptr, int *offset_ptr)
{
    target_long disp;
    int havesib;
    int base;
    int index;
    int scale;
    int opreg;
    int mod, rm, code, override, must_add_seg;

    override = s->override;
    must_add_seg = s->addseg;
    if (override >= 0)
        must_add_seg = 1;
    mod = (modrm >> 6) & 3;
    rm = modrm & 7;

    if (s->aflag) {

        havesib = 0;
        base = rm;
        index = 0;
        scale = 0;

        if (base == 4) {
            havesib = 1;
            code = cpu_ldub_code(env, s->pc++);
            scale = (code >> 6) & 3;
            index = ((code >> 3) & 7) | REX_X(s);
            base = (code & 7);
        }
        base |= REX_B(s);

        switch (mod) {
        case 0:
            if ((base & 7) == 5) {
                base = -1;
                disp = (int32_t)cpu_ldl_code(env, s->pc);
                s->pc += 4;
                if (CODE64(s) && !havesib) {
                    disp += s->pc + s->rip_offset;
                }
            } else {
                disp = 0;
            }
            break;
        case 1:
            disp = (int8_t)cpu_ldub_code(env, s->pc++);
            break;
        default:
        case 2:
            disp = (int32_t)cpu_ldl_code(env, s->pc);
            s->pc += 4;
            break;
        }

        if (base >= 0) {
            /* for correct popl handling with esp */
            if (base == 4 && s->popl_esp_hack)
                disp += s->popl_esp_hack;
#ifdef TARGET_X86_64
            if (s->aflag == 2) {
                gen_op_movq_A0_reg(base);
                if (disp != 0) {
                    gen_op_addq_A0_im(disp);
                }
            } else
#endif
            {
                gen_op_movl_A0_reg(base);
                if (disp != 0)
                    gen_op_addl_A0_im(disp);
            }
        } else {
#ifdef TARGET_X86_64
            if (s->aflag == 2) {
                gen_op_movq_A0_im(disp);
            } else
#endif
            {
                gen_op_movl_A0_im(disp);
            }
        }
        /* index == 4 means no index */
        if (havesib && (index != 4)) {
#ifdef TARGET_X86_64
            if (s->aflag == 2) {
                gen_op_addq_A0_reg_sN(scale, index);
            } else
#endif
            {
                gen_op_addl_A0_reg_sN(scale, index);
            }
        }
        if (must_add_seg) {
            if (override < 0) {
                if (base == R_EBP || base == R_ESP)
                    override = R_SS;
                else
                    override = R_DS;
            }
#ifdef TARGET_X86_64
            if (s->aflag == 2) {
                gen_op_addq_A0_seg(override);
            } else
#endif
            {
                gen_op_addl_A0_seg(s, override);
            }
        }
    } else {
        switch (mod) {
        case 0:
            if (rm == 6) {
                disp = cpu_lduw_code(env, s->pc);
                s->pc += 2;
                gen_op_movl_A0_im(disp);
                rm = 0; /* avoid SS override */
                goto no_rm;
            } else {
                disp = 0;
            }
            break;
        case 1:
            disp = (int8_t)cpu_ldub_code(env, s->pc++);
            break;
        default:
        case 2:
            disp = cpu_lduw_code(env, s->pc);
            s->pc += 2;
            break;
        }
        switch(rm) {
        case 0:
            gen_op_movl_A0_reg(R_EBX);
            gen_op_addl_A0_reg_sN(0, R_ESI);
            break;
        case 1:
            gen_op_movl_A0_reg(R_EBX);
            gen_op_addl_A0_reg_sN(0, R_EDI);
            break;
        case 2:
            gen_op_movl_A0_reg(R_EBP);
            gen_op_addl_A0_reg_sN(0, R_ESI);
            break;
        case 3:
            gen_op_movl_A0_reg(R_EBP);
            gen_op_addl_A0_reg_sN(0, R_EDI);
            break;
        case 4:
            gen_op_movl_A0_reg(R_ESI);
            break;
        case 5:
            gen_op_movl_A0_reg(R_EDI);
            break;
        case 6:
            gen_op_movl_A0_reg(R_EBP);
            break;
        default:
        case 7:
            gen_op_movl_A0_reg(R_EBX);
            break;
        }
        if (disp != 0)
            gen_op_addl_A0_im(disp);
        gen_op_andl_A0_ffff();
    no_rm:
        if (must_add_seg) {
            if (override < 0) {
                if (rm == 2 || rm == 3 || rm == 6)
                    override = R_SS;
                else
                    override = R_DS;
            }
            gen_op_addl_A0_seg(s, override);
        }
    }

    opreg = OR_A0;
    disp = 0;
    *reg_ptr = opreg;
    *offset_ptr = disp;
}

static void gen_nop_modrm(CPUX86State *env, DisasContext *s, int modrm)
{
    int mod, rm, base, code;

    mod = (modrm >> 6) & 3;
    if (mod == 3)
        return;
    rm = modrm & 7;

    if (s->aflag) {

        base = rm;

        if (base == 4) {
            code = cpu_ldub_code(env, s->pc++);
            base = (code & 7);
        }

        switch (mod) {
        case 0:
            if (base == 5) {
                s->pc += 4;
            }
            break;
        case 1:
            s->pc++;
            break;
        default:
        case 2:
            s->pc += 4;
            break;
        }
    } else {
        switch (mod) {
        case 0:
            if (rm == 6) {
                s->pc += 2;
            }
            break;
        case 1:
            s->pc++;
            break;
        default:
        case 2:
            s->pc += 2;
            break;
        }
    }
}

/* used for LEA and MOV AX, mem */
static void gen_add_A0_ds_seg(DisasContext *s)
{
    int override, must_add_seg;
    must_add_seg = s->addseg;
    override = R_DS;
    if (s->override >= 0) {
        override = s->override;
        must_add_seg = 1;
    }
    if (must_add_seg) {
#ifdef TARGET_X86_64
        if (CODE64(s)) {
            gen_op_addq_A0_seg(override);
        } else
#endif
        {
            gen_op_addl_A0_seg(s, override);
        }
    }
}

/* generate modrm memory load or store of 'reg'. TMP0 is used if reg ==
   OR_TMP0 */
static void gen_ldst_modrm(CPUX86State *env, DisasContext *s, int modrm,
                           int ot, int reg, int is_store)
{
    int mod, rm, opreg, disp;

    mod = (modrm >> 6) & 3;
    rm = (modrm & 7) | REX_B(s);
    if (mod == 3) {
        if (is_store) {
            if (reg != OR_TMP0)
                gen_op_mov_TN_reg(ot, 0, reg);
            gen_op_mov_reg_T0(ot, rm);
        } else {
            gen_op_mov_TN_reg(ot, 0, rm);
            if (reg != OR_TMP0)
                gen_op_mov_reg_T0(ot, reg);
        }
    } else {
        gen_lea_modrm(env, s, modrm, &opreg, &disp);
        if (is_store) {
            if (reg != OR_TMP0)
                gen_op_mov_TN_reg(ot, 0, reg);
            gen_op_st_T0_A0(ot + s->mem_index);
        } else {
            gen_op_ld_T0_A0(ot + s->mem_index);
            if (reg != OR_TMP0)
                gen_op_mov_reg_T0(ot, reg);
        }
    }
}

static inline uint32_t insn_get(CPUX86State *env, DisasContext *s, int ot)
{
    uint32_t ret;

    switch(ot) {
    case OT_BYTE:
        ret = cpu_ldub_code(env, s->pc);
        s->pc++;
        break;
    case OT_WORD:
        ret = cpu_lduw_code(env, s->pc);
        s->pc += 2;
        break;
    default:
    case OT_LONG:
        ret = cpu_ldl_code(env, s->pc);
        s->pc += 4;
        break;
    }
    return ret;
}

static inline int insn_const_size(unsigned int ot)
{
    if (ot <= OT_LONG)
        return 1 << ot;
    else
        return 4;
}

static inline void gen_goto_tb(DisasContext *s, int tb_num, target_ulong eip)
{
    TranslationBlock *tb;
    target_ulong pc;

    pc = s->cs_base + eip;
    tb = s->tb;
    /* NOTE: we handle the case where the TB spans two pages here */
    if ((pc & TARGET_PAGE_MASK) == (tb->pc & TARGET_PAGE_MASK) ||
        (pc & TARGET_PAGE_MASK) == ((s->pc - 1) & TARGET_PAGE_MASK))  {
        /* jump to same page: we can use a direct jump */
        tcg_gen_goto_tb(tb_num);
        gen_jmp_im(eip);
        tcg_gen_exit_tb((tcg_target_long)tb + tb_num);
    } else {
        /* jump to another page: currently not optimized */
        gen_jmp_im(eip);
        gen_eob(s);
    }
}

static inline void gen_jcc(DisasContext *s, int b,
                           target_ulong val, target_ulong next_eip)
{
    int l1, l2;

    if (s->jmp_opt) {
        l1 = gen_new_label();
        gen_jcc1(s, b, l1);

        gen_goto_tb(s, 0, next_eip);

        gen_set_label(l1);
        gen_goto_tb(s, 1, val);
        s->is_jmp = DISAS_TB_JUMP;
    } else {
        l1 = gen_new_label();
        l2 = gen_new_label();
        gen_jcc1(s, b, l1);

        gen_jmp_im(next_eip);
        tcg_gen_br(l2);

        gen_set_label(l1);
        gen_jmp_im(val);
        gen_set_label(l2);
        gen_eob(s);
    }
}

static void gen_cmovcc1(CPUX86State *env, DisasContext *s, int ot, int b,
                        int modrm, int reg)
{
    CCPrepare cc;

    gen_ldst_modrm(env, s, modrm, ot, OR_TMP0, 0);

    cc = gen_prepare_cc(s, b, cpu_T[1]);
    if (cc.mask != -1) {
        TCGv t0 = tcg_temp_new();
        tcg_gen_andi_tl(t0, cc.reg, cc.mask);
        cc.reg = t0;
    }
    if (!cc.use_reg2) {
        cc.reg2 = tcg_const_tl(cc.imm);
    }

    tcg_gen_movcond_tl(cc.cond, cpu_T[0], cc.reg, cc.reg2,
                       cpu_T[0], cpu_regs[reg]);
    gen_op_mov_reg_T0(ot, reg);

    if (cc.mask != -1) {
        tcg_temp_free(cc.reg);
    }
    if (!cc.use_reg2) {
        tcg_temp_free(cc.reg2);
    }
}

static inline void gen_op_movl_T0_seg(int seg_reg)
{
    tcg_gen_ld32u_tl(cpu_T[0], cpu_env, 
                     offsetof(CPUX86State,segs[seg_reg].selector));
}

static inline void gen_op_movl_seg_T0_vm(int seg_reg)
{
    tcg_gen_andi_tl(cpu_T[0], cpu_T[0], 0xffff);
    tcg_gen_st32_tl(cpu_T[0], cpu_env, 
                    offsetof(CPUX86State,segs[seg_reg].selector));
    tcg_gen_shli_tl(cpu_T[0], cpu_T[0], 4);
    tcg_gen_st_tl(cpu_T[0], cpu_env, 
                  offsetof(CPUX86State,segs[seg_reg].base));
}

/* move T0 to seg_reg and compute if the CPU state may change. Never
   call this function with seg_reg == R_CS */
static void gen_movl_seg_T0(DisasContext *s, int seg_reg, target_ulong cur_eip)
{
    if (s->pe && !s->vm86) {
        /* XXX: optimize by finding processor state dynamically */
        gen_update_cc_op(s);
        gen_jmp_im(cur_eip);
        tcg_gen_trunc_tl_i32(cpu_tmp2_i32, cpu_T[0]);
        gen_helper_load_seg(cpu_env, tcg_const_i32(seg_reg), cpu_tmp2_i32);
        /* abort translation because the addseg value may change or
           because ss32 may change. For R_SS, translation must always
           stop as a special handling must be done to disable hardware
           interrupts for the next instruction */
        if (seg_reg == R_SS || (s->code32 && seg_reg < R_FS))
            s->is_jmp = DISAS_TB_JUMP;
    } else {
        gen_op_movl_seg_T0_vm(seg_reg);
        if (seg_reg == R_SS)
            s->is_jmp = DISAS_TB_JUMP;
    }
}

static inline int svm_is_rep(int prefixes)
{
    return ((prefixes & (PREFIX_REPZ | PREFIX_REPNZ)) ? 8 : 0);
}

static inline void
gen_svm_check_intercept_param(DisasContext *s, target_ulong pc_start,
                              uint32_t type, uint64_t param)
{
    /* no SVM activated; fast case */
    if (likely(!(s->flags & HF_SVMI_MASK)))
        return;
    gen_update_cc_op(s);
    gen_jmp_im(pc_start - s->cs_base);
    gen_helper_svm_check_intercept_param(cpu_env, tcg_const_i32(type),
                                         tcg_const_i64(param));
}

static inline void
gen_svm_check_intercept(DisasContext *s, target_ulong pc_start, uint64_t type)
{
    gen_svm_check_intercept_param(s, pc_start, type, 0);
}

static inline void gen_stack_update(DisasContext *s, int addend)
{
#ifdef TARGET_X86_64
    if (CODE64(s)) {
        gen_op_add_reg_im(2, R_ESP, addend);
    } else
#endif
    if (s->ss32) {
        gen_op_add_reg_im(1, R_ESP, addend);
    } else {
        gen_op_add_reg_im(0, R_ESP, addend);
    }
}

/* generate a push. It depends on ss32, addseg and dflag */
static void gen_push_T0(DisasContext *s)
{
#ifdef TARGET_X86_64
    if (CODE64(s)) {
        gen_op_movq_A0_reg(R_ESP);
        if (s->dflag) {
            gen_op_addq_A0_im(-8);
            gen_op_st_T0_A0(OT_QUAD + s->mem_index);
        } else {
            gen_op_addq_A0_im(-2);
            gen_op_st_T0_A0(OT_WORD + s->mem_index);
        }
        gen_op_mov_reg_A0(2, R_ESP);
    } else
#endif
    {
        gen_op_movl_A0_reg(R_ESP);
        if (!s->dflag)
            gen_op_addl_A0_im(-2);
        else
            gen_op_addl_A0_im(-4);
        if (s->ss32) {
            if (s->addseg) {
                tcg_gen_mov_tl(cpu_T[1], cpu_A0);
                gen_op_addl_A0_seg(s, R_SS);
            }
        } else {
            gen_op_andl_A0_ffff();
            tcg_gen_mov_tl(cpu_T[1], cpu_A0);
            gen_op_addl_A0_seg(s, R_SS);
        }
        gen_op_st_T0_A0(s->dflag + 1 + s->mem_index);
        if (s->ss32 && !s->addseg)
            gen_op_mov_reg_A0(1, R_ESP);
        else
            gen_op_mov_reg_T1(s->ss32 + 1, R_ESP);
    }
}

/* generate a push. It depends on ss32, addseg and dflag */
/* slower version for T1, only used for call Ev */
static void gen_push_T1(DisasContext *s)
{
#ifdef TARGET_X86_64
    if (CODE64(s)) {
        gen_op_movq_A0_reg(R_ESP);
        if (s->dflag) {
            gen_op_addq_A0_im(-8);
            gen_op_st_T1_A0(OT_QUAD + s->mem_index);
        } else {
            gen_op_addq_A0_im(-2);
            gen_op_st_T0_A0(OT_WORD + s->mem_index);
        }
        gen_op_mov_reg_A0(2, R_ESP);
    } else
#endif
    {
        gen_op_movl_A0_reg(R_ESP);
        if (!s->dflag)
            gen_op_addl_A0_im(-2);
        else
            gen_op_addl_A0_im(-4);
        if (s->ss32) {
            if (s->addseg) {
                gen_op_addl_A0_seg(s, R_SS);
            }
        } else {
            gen_op_andl_A0_ffff();
            gen_op_addl_A0_seg(s, R_SS);
        }
        gen_op_st_T1_A0(s->dflag + 1 + s->mem_index);

        if (s->ss32 && !s->addseg)
            gen_op_mov_reg_A0(1, R_ESP);
        else
            gen_stack_update(s, (-2) << s->dflag);
    }
}

/* two step pop is necessary for precise exceptions */
static void gen_pop_T0(DisasContext *s)
{
#ifdef TARGET_X86_64
    if (CODE64(s)) {
        gen_op_movq_A0_reg(R_ESP);
        gen_op_ld_T0_A0((s->dflag ? OT_QUAD : OT_WORD) + s->mem_index);
    } else
#endif
    {
        gen_op_movl_A0_reg(R_ESP);
        if (s->ss32) {
            if (s->addseg)
                gen_op_addl_A0_seg(s, R_SS);
        } else {
            gen_op_andl_A0_ffff();
            gen_op_addl_A0_seg(s, R_SS);
        }
        gen_op_ld_T0_A0(s->dflag + 1 + s->mem_index);
    }
}

static void gen_pop_update(DisasContext *s)
{
#ifdef TARGET_X86_64
    if (CODE64(s) && s->dflag) {
        gen_stack_update(s, 8);
    } else
#endif
    {
        gen_stack_update(s, 2 << s->dflag);
    }
}

static void gen_stack_A0(DisasContext *s)
{
    gen_op_movl_A0_reg(R_ESP);
    if (!s->ss32)
        gen_op_andl_A0_ffff();
    tcg_gen_mov_tl(cpu_T[1], cpu_A0);
    if (s->addseg)
        gen_op_addl_A0_seg(s, R_SS);
}

/* NOTE: wrap around in 16 bit not fully handled */
static void gen_pusha(DisasContext *s)
{
    int i;
    gen_op_movl_A0_reg(R_ESP);
    gen_op_addl_A0_im(-16 <<  s->dflag);
    if (!s->ss32)
        gen_op_andl_A0_ffff();
    tcg_gen_mov_tl(cpu_T[1], cpu_A0);
    if (s->addseg)
        gen_op_addl_A0_seg(s, R_SS);
    for(i = 0;i < 8; i++) {
        gen_op_mov_TN_reg(OT_LONG, 0, 7 - i);
        gen_op_st_T0_A0(OT_WORD + s->dflag + s->mem_index);
        gen_op_addl_A0_im(2 <<  s->dflag);
    }
    gen_op_mov_reg_T1(OT_WORD + s->ss32, R_ESP);
}

/* NOTE: wrap around in 16 bit not fully handled */
static void gen_popa(DisasContext *s)
{
    int i;
    gen_op_movl_A0_reg(R_ESP);
    if (!s->ss32)
        gen_op_andl_A0_ffff();
    tcg_gen_mov_tl(cpu_T[1], cpu_A0);
    tcg_gen_addi_tl(cpu_T[1], cpu_T[1], 16 <<  s->dflag);
    if (s->addseg)
        gen_op_addl_A0_seg(s, R_SS);
    for(i = 0;i < 8; i++) {
        /* ESP is not reloaded */
        if (i != 3) {
            gen_op_ld_T0_A0(OT_WORD + s->dflag + s->mem_index);
            gen_op_mov_reg_T0(OT_WORD + s->dflag, 7 - i);
        }
        gen_op_addl_A0_im(2 <<  s->dflag);
    }
    gen_op_mov_reg_T1(OT_WORD + s->ss32, R_ESP);
}

static void gen_enter(DisasContext *s, int esp_addend, int level)
{
    int ot, opsize;

    level &= 0x1f;
#ifdef TARGET_X86_64
    if (CODE64(s)) {
        ot = s->dflag ? OT_QUAD : OT_WORD;
        opsize = 1 << ot;

        gen_op_movl_A0_reg(R_ESP);
        gen_op_addq_A0_im(-opsize);
        tcg_gen_mov_tl(cpu_T[1], cpu_A0);

        /* push bp */
        gen_op_mov_TN_reg(OT_LONG, 0, R_EBP);
        gen_op_st_T0_A0(ot + s->mem_index);
        if (level) {
            /* XXX: must save state */
            gen_helper_enter64_level(cpu_env, tcg_const_i32(level),
                                     tcg_const_i32((ot == OT_QUAD)),
                                     cpu_T[1]);
        }
        gen_op_mov_reg_T1(ot, R_EBP);
        tcg_gen_addi_tl(cpu_T[1], cpu_T[1], -esp_addend + (-opsize * level));
        gen_op_mov_reg_T1(OT_QUAD, R_ESP);
    } else
#endif
    {
        ot = s->dflag + OT_WORD;
        opsize = 2 << s->dflag;

        gen_op_movl_A0_reg(R_ESP);
        gen_op_addl_A0_im(-opsize);
        if (!s->ss32)
            gen_op_andl_A0_ffff();
        tcg_gen_mov_tl(cpu_T[1], cpu_A0);
        if (s->addseg)
            gen_op_addl_A0_seg(s, R_SS);
        /* push bp */
        gen_op_mov_TN_reg(OT_LONG, 0, R_EBP);
        gen_op_st_T0_A0(ot + s->mem_index);
        if (level) {
            /* XXX: must save state */
            gen_helper_enter_level(cpu_env, tcg_const_i32(level),
                                   tcg_const_i32(s->dflag),
                                   cpu_T[1]);
        }
        gen_op_mov_reg_T1(ot, R_EBP);
        tcg_gen_addi_tl(cpu_T[1], cpu_T[1], -esp_addend + (-opsize * level));
        gen_op_mov_reg_T1(OT_WORD + s->ss32, R_ESP);
    }
}

static void gen_exception(DisasContext *s, int trapno, target_ulong cur_eip)
{
    gen_update_cc_op(s);
    gen_jmp_im(cur_eip);
    gen_helper_raise_exception(cpu_env, tcg_const_i32(trapno));
    s->is_jmp = DISAS_TB_JUMP;
}

/* an interrupt is different from an exception because of the
   privilege checks */
static void gen_interrupt(DisasContext *s, int intno,
                          target_ulong cur_eip, target_ulong next_eip)
{
    gen_update_cc_op(s);
    gen_jmp_im(cur_eip);
    gen_helper_raise_interrupt(cpu_env, tcg_const_i32(intno),
                               tcg_const_i32(next_eip - cur_eip));
    s->is_jmp = DISAS_TB_JUMP;
}

static void gen_debug(DisasContext *s, target_ulong cur_eip)
{
    gen_update_cc_op(s);
    gen_jmp_im(cur_eip);
    gen_helper_debug(cpu_env);
    s->is_jmp = DISAS_TB_JUMP;
}

/* generate a generic end of block. Trace exception is also generated
   if needed */
static void gen_eob(DisasContext *s)
{
    gen_update_cc_op(s);
    if (s->tb->flags & HF_INHIBIT_IRQ_MASK) {
        gen_helper_reset_inhibit_irq(cpu_env);
    }
    if (s->tb->flags & HF_RF_MASK) {
        gen_helper_reset_rf(cpu_env);
    }
    if (s->singlestep_enabled) {
        gen_helper_debug(cpu_env);
    } else if (s->tf) {
        gen_helper_single_step(cpu_env);
    } else {
        tcg_gen_exit_tb(0);
    }
    s->is_jmp = DISAS_TB_JUMP;
}

/* generate a jump to eip. No segment change must happen before as a
   direct call to the next block may occur */
static void gen_jmp_tb(DisasContext *s, target_ulong eip, int tb_num)
{
    gen_update_cc_op(s);
    set_cc_op(s, CC_OP_DYNAMIC);
    if (s->jmp_opt) {
        gen_goto_tb(s, tb_num, eip);
        s->is_jmp = DISAS_TB_JUMP;
    } else {
        gen_jmp_im(eip);
        gen_eob(s);
    }
}

static void gen_jmp(DisasContext *s, target_ulong eip)
{
    gen_jmp_tb(s, eip, 0);
}

static inline void gen_ldq_env_A0(int idx, int offset)
{
    int mem_index = (idx >> 2) - 1;
    tcg_gen_qemu_ld64(cpu_tmp1_i64, cpu_A0, mem_index);
    tcg_gen_st_i64(cpu_tmp1_i64, cpu_env, offset);
}

static inline void gen_stq_env_A0(int idx, int offset)
{
    int mem_index = (idx >> 2) - 1;
    tcg_gen_ld_i64(cpu_tmp1_i64, cpu_env, offset);
    tcg_gen_qemu_st64(cpu_tmp1_i64, cpu_A0, mem_index);
}

static inline void gen_ldo_env_A0(int idx, int offset)
{
    int mem_index = (idx >> 2) - 1;
    tcg_gen_qemu_ld64(cpu_tmp1_i64, cpu_A0, mem_index);
    tcg_gen_st_i64(cpu_tmp1_i64, cpu_env, offset + offsetof(XMMReg, XMM_Q(0)));
    tcg_gen_addi_tl(cpu_tmp0, cpu_A0, 8);
    tcg_gen_qemu_ld64(cpu_tmp1_i64, cpu_tmp0, mem_index);
    tcg_gen_st_i64(cpu_tmp1_i64, cpu_env, offset + offsetof(XMMReg, XMM_Q(1)));
}

static inline void gen_sto_env_A0(int idx, int offset)
{
    int mem_index = (idx >> 2) - 1;
    tcg_gen_ld_i64(cpu_tmp1_i64, cpu_env, offset + offsetof(XMMReg, XMM_Q(0)));
    tcg_gen_qemu_st64(cpu_tmp1_i64, cpu_A0, mem_index);
    tcg_gen_addi_tl(cpu_tmp0, cpu_A0, 8);
    tcg_gen_ld_i64(cpu_tmp1_i64, cpu_env, offset + offsetof(XMMReg, XMM_Q(1)));
    tcg_gen_qemu_st64(cpu_tmp1_i64, cpu_tmp0, mem_index);
}

static inline void gen_op_movo(int d_offset, int s_offset)
{
    tcg_gen_ld_i64(cpu_tmp1_i64, cpu_env, s_offset);
    tcg_gen_st_i64(cpu_tmp1_i64, cpu_env, d_offset);
    tcg_gen_ld_i64(cpu_tmp1_i64, cpu_env, s_offset + 8);
    tcg_gen_st_i64(cpu_tmp1_i64, cpu_env, d_offset + 8);
}

static inline void gen_op_movq(int d_offset, int s_offset)
{
    tcg_gen_ld_i64(cpu_tmp1_i64, cpu_env, s_offset);
    tcg_gen_st_i64(cpu_tmp1_i64, cpu_env, d_offset);
}

static inline void gen_op_movl(int d_offset, int s_offset)
{
    tcg_gen_ld_i32(cpu_tmp2_i32, cpu_env, s_offset);
    tcg_gen_st_i32(cpu_tmp2_i32, cpu_env, d_offset);
}

static inline void gen_op_movq_env_0(int d_offset)
{
    tcg_gen_movi_i64(cpu_tmp1_i64, 0);
    tcg_gen_st_i64(cpu_tmp1_i64, cpu_env, d_offset);
}

typedef void (*SSEFunc_i_ep)(TCGv_i32 val, TCGv_ptr env, TCGv_ptr reg);
typedef void (*SSEFunc_l_ep)(TCGv_i64 val, TCGv_ptr env, TCGv_ptr reg);
typedef void (*SSEFunc_0_epi)(TCGv_ptr env, TCGv_ptr reg, TCGv_i32 val);
typedef void (*SSEFunc_0_epl)(TCGv_ptr env, TCGv_ptr reg, TCGv_i64 val);
typedef void (*SSEFunc_0_epp)(TCGv_ptr env, TCGv_ptr reg_a, TCGv_ptr reg_b);
typedef void (*SSEFunc_0_eppi)(TCGv_ptr env, TCGv_ptr reg_a, TCGv_ptr reg_b,
                               TCGv_i32 val);
typedef void (*SSEFunc_0_ppi)(TCGv_ptr reg_a, TCGv_ptr reg_b, TCGv_i32 val);
typedef void (*SSEFunc_0_eppt)(TCGv_ptr env, TCGv_ptr reg_a, TCGv_ptr reg_b,
                               TCGv val);

#define SSE_SPECIAL ((void *)1)
#define SSE_DUMMY ((void *)2)

#define MMX_OP2(x) { gen_helper_ ## x ## _mmx, gen_helper_ ## x ## _xmm }
#define SSE_FOP(x) { gen_helper_ ## x ## ps, gen_helper_ ## x ## pd, \
                     gen_helper_ ## x ## ss, gen_helper_ ## x ## sd, }

static const SSEFunc_0_epp sse_op_table1[256][4] = {
    /* 3DNow! extensions */
    [0x0e] = { SSE_DUMMY }, /* femms */
    [0x0f] = { SSE_DUMMY }, /* pf... */
    /* pure SSE operations */
    [0x10] = { SSE_SPECIAL, SSE_SPECIAL, SSE_SPECIAL, SSE_SPECIAL }, /* movups, movupd, movss, movsd */
    [0x11] = { SSE_SPECIAL, SSE_SPECIAL, SSE_SPECIAL, SSE_SPECIAL }, /* movups, movupd, movss, movsd */
    [0x12] = { SSE_SPECIAL, SSE_SPECIAL, SSE_SPECIAL, SSE_SPECIAL }, /* movlps, movlpd, movsldup, movddup */
    [0x13] = { SSE_SPECIAL, SSE_SPECIAL },  /* movlps, movlpd */
    [0x14] = { gen_helper_punpckldq_xmm, gen_helper_punpcklqdq_xmm },
    [0x15] = { gen_helper_punpckhdq_xmm, gen_helper_punpckhqdq_xmm },
    [0x16] = { SSE_SPECIAL, SSE_SPECIAL, SSE_SPECIAL },  /* movhps, movhpd, movshdup */
    [0x17] = { SSE_SPECIAL, SSE_SPECIAL },  /* movhps, movhpd */

    [0x28] = { SSE_SPECIAL, SSE_SPECIAL },  /* movaps, movapd */
    [0x29] = { SSE_SPECIAL, SSE_SPECIAL },  /* movaps, movapd */
    [0x2a] = { SSE_SPECIAL, SSE_SPECIAL, SSE_SPECIAL, SSE_SPECIAL }, /* cvtpi2ps, cvtpi2pd, cvtsi2ss, cvtsi2sd */
    [0x2b] = { SSE_SPECIAL, SSE_SPECIAL, SSE_SPECIAL, SSE_SPECIAL }, /* movntps, movntpd, movntss, movntsd */
    [0x2c] = { SSE_SPECIAL, SSE_SPECIAL, SSE_SPECIAL, SSE_SPECIAL }, /* cvttps2pi, cvttpd2pi, cvttsd2si, cvttss2si */
    [0x2d] = { SSE_SPECIAL, SSE_SPECIAL, SSE_SPECIAL, SSE_SPECIAL }, /* cvtps2pi, cvtpd2pi, cvtsd2si, cvtss2si */
    [0x2e] = { gen_helper_ucomiss, gen_helper_ucomisd },
    [0x2f] = { gen_helper_comiss, gen_helper_comisd },
    [0x50] = { SSE_SPECIAL, SSE_SPECIAL }, /* movmskps, movmskpd */
    [0x51] = SSE_FOP(sqrt),
    [0x52] = { gen_helper_rsqrtps, NULL, gen_helper_rsqrtss, NULL },
    [0x53] = { gen_helper_rcpps, NULL, gen_helper_rcpss, NULL },
    [0x54] = { gen_helper_pand_xmm, gen_helper_pand_xmm }, /* andps, andpd */
    [0x55] = { gen_helper_pandn_xmm, gen_helper_pandn_xmm }, /* andnps, andnpd */
    [0x56] = { gen_helper_por_xmm, gen_helper_por_xmm }, /* orps, orpd */
    [0x57] = { gen_helper_pxor_xmm, gen_helper_pxor_xmm }, /* xorps, xorpd */
    [0x58] = SSE_FOP(add),
    [0x59] = SSE_FOP(mul),
    [0x5a] = { gen_helper_cvtps2pd, gen_helper_cvtpd2ps,
               gen_helper_cvtss2sd, gen_helper_cvtsd2ss },
    [0x5b] = { gen_helper_cvtdq2ps, gen_helper_cvtps2dq, gen_helper_cvttps2dq },
    [0x5c] = SSE_FOP(sub),
    [0x5d] = SSE_FOP(min),
    [0x5e] = SSE_FOP(div),
    [0x5f] = SSE_FOP(max),

    [0xc2] = SSE_FOP(cmpeq),
    [0xc6] = { (SSEFunc_0_epp)gen_helper_shufps,
               (SSEFunc_0_epp)gen_helper_shufpd }, /* XXX: casts */

    [0x38] = { SSE_SPECIAL, SSE_SPECIAL, NULL, SSE_SPECIAL }, /* SSSE3/SSE4 */
    [0x3a] = { SSE_SPECIAL, SSE_SPECIAL }, /* SSSE3/SSE4 */

    /* MMX ops and their SSE extensions */
    [0x60] = MMX_OP2(punpcklbw),
    [0x61] = MMX_OP2(punpcklwd),
    [0x62] = MMX_OP2(punpckldq),
    [0x63] = MMX_OP2(packsswb),
    [0x64] = MMX_OP2(pcmpgtb),
    [0x65] = MMX_OP2(pcmpgtw),
    [0x66] = MMX_OP2(pcmpgtl),
    [0x67] = MMX_OP2(packuswb),
    [0x68] = MMX_OP2(punpckhbw),
    [0x69] = MMX_OP2(punpckhwd),
    [0x6a] = MMX_OP2(punpckhdq),
    [0x6b] = MMX_OP2(packssdw),
    [0x6c] = { NULL, gen_helper_punpcklqdq_xmm },
    [0x6d] = { NULL, gen_helper_punpckhqdq_xmm },
    [0x6e] = { SSE_SPECIAL, SSE_SPECIAL }, /* movd mm, ea */
    [0x6f] = { SSE_SPECIAL, SSE_SPECIAL, SSE_SPECIAL }, /* movq, movdqa, , movqdu */
    [0x70] = { (SSEFunc_0_epp)gen_helper_pshufw_mmx,
               (SSEFunc_0_epp)gen_helper_pshufd_xmm,
               (SSEFunc_0_epp)gen_helper_pshufhw_xmm,
               (SSEFunc_0_epp)gen_helper_pshuflw_xmm }, /* XXX: casts */
    [0x71] = { SSE_SPECIAL, SSE_SPECIAL }, /* shiftw */
    [0x72] = { SSE_SPECIAL, SSE_SPECIAL }, /* shiftd */
    [0x73] = { SSE_SPECIAL, SSE_SPECIAL }, /* shiftq */
    [0x74] = MMX_OP2(pcmpeqb),
    [0x75] = MMX_OP2(pcmpeqw),
    [0x76] = MMX_OP2(pcmpeql),
    [0x77] = { SSE_DUMMY }, /* emms */
    [0x78] = { NULL, SSE_SPECIAL, NULL, SSE_SPECIAL }, /* extrq_i, insertq_i */
    [0x79] = { NULL, gen_helper_extrq_r, NULL, gen_helper_insertq_r },
    [0x7c] = { NULL, gen_helper_haddpd, NULL, gen_helper_haddps },
    [0x7d] = { NULL, gen_helper_hsubpd, NULL, gen_helper_hsubps },
    [0x7e] = { SSE_SPECIAL, SSE_SPECIAL, SSE_SPECIAL }, /* movd, movd, , movq */
    [0x7f] = { SSE_SPECIAL, SSE_SPECIAL, SSE_SPECIAL }, /* movq, movdqa, movdqu */
    [0xc4] = { SSE_SPECIAL, SSE_SPECIAL }, /* pinsrw */
    [0xc5] = { SSE_SPECIAL, SSE_SPECIAL }, /* pextrw */
    [0xd0] = { NULL, gen_helper_addsubpd, NULL, gen_helper_addsubps },
    [0xd1] = MMX_OP2(psrlw),
    [0xd2] = MMX_OP2(psrld),
    [0xd3] = MMX_OP2(psrlq),
    [0xd4] = MMX_OP2(paddq),
    [0xd5] = MMX_OP2(pmullw),
    [0xd6] = { NULL, SSE_SPECIAL, SSE_SPECIAL, SSE_SPECIAL },
    [0xd7] = { SSE_SPECIAL, SSE_SPECIAL }, /* pmovmskb */
    [0xd8] = MMX_OP2(psubusb),
    [0xd9] = MMX_OP2(psubusw),
    [0xda] = MMX_OP2(pminub),
    [0xdb] = MMX_OP2(pand),
    [0xdc] = MMX_OP2(paddusb),
    [0xdd] = MMX_OP2(paddusw),
    [0xde] = MMX_OP2(pmaxub),
    [0xdf] = MMX_OP2(pandn),
    [0xe0] = MMX_OP2(pavgb),
    [0xe1] = MMX_OP2(psraw),
    [0xe2] = MMX_OP2(psrad),
    [0xe3] = MMX_OP2(pavgw),
    [0xe4] = MMX_OP2(pmulhuw),
    [0xe5] = MMX_OP2(pmulhw),
    [0xe6] = { NULL, gen_helper_cvttpd2dq, gen_helper_cvtdq2pd, gen_helper_cvtpd2dq },
    [0xe7] = { SSE_SPECIAL , SSE_SPECIAL },  /* movntq, movntq */
    [0xe8] = MMX_OP2(psubsb),
    [0xe9] = MMX_OP2(psubsw),
    [0xea] = MMX_OP2(pminsw),
    [0xeb] = MMX_OP2(por),
    [0xec] = MMX_OP2(paddsb),
    [0xed] = MMX_OP2(paddsw),
    [0xee] = MMX_OP2(pmaxsw),
    [0xef] = MMX_OP2(pxor),
    [0xf0] = { NULL, NULL, NULL, SSE_SPECIAL }, /* lddqu */
    [0xf1] = MMX_OP2(psllw),
    [0xf2] = MMX_OP2(pslld),
    [0xf3] = MMX_OP2(psllq),
    [0xf4] = MMX_OP2(pmuludq),
    [0xf5] = MMX_OP2(pmaddwd),
    [0xf6] = MMX_OP2(psadbw),
    [0xf7] = { (SSEFunc_0_epp)gen_helper_maskmov_mmx,
               (SSEFunc_0_epp)gen_helper_maskmov_xmm }, /* XXX: casts */
    [0xf8] = MMX_OP2(psubb),
    [0xf9] = MMX_OP2(psubw),
    [0xfa] = MMX_OP2(psubl),
    [0xfb] = MMX_OP2(psubq),
    [0xfc] = MMX_OP2(paddb),
    [0xfd] = MMX_OP2(paddw),
    [0xfe] = MMX_OP2(paddl),
};

static const SSEFunc_0_epp sse_op_table2[3 * 8][2] = {
    [0 + 2] = MMX_OP2(psrlw),
    [0 + 4] = MMX_OP2(psraw),
    [0 + 6] = MMX_OP2(psllw),
    [8 + 2] = MMX_OP2(psrld),
    [8 + 4] = MMX_OP2(psrad),
    [8 + 6] = MMX_OP2(pslld),
    [16 + 2] = MMX_OP2(psrlq),
    [16 + 3] = { NULL, gen_helper_psrldq_xmm },
    [16 + 6] = MMX_OP2(psllq),
    [16 + 7] = { NULL, gen_helper_pslldq_xmm },
};

static const SSEFunc_0_epi sse_op_table3ai[] = {
    gen_helper_cvtsi2ss,
    gen_helper_cvtsi2sd
};

#ifdef TARGET_X86_64
static const SSEFunc_0_epl sse_op_table3aq[] = {
    gen_helper_cvtsq2ss,
    gen_helper_cvtsq2sd
};
#endif

static const SSEFunc_i_ep sse_op_table3bi[] = {
    gen_helper_cvttss2si,
    gen_helper_cvtss2si,
    gen_helper_cvttsd2si,
    gen_helper_cvtsd2si
};

#ifdef TARGET_X86_64
static const SSEFunc_l_ep sse_op_table3bq[] = {
    gen_helper_cvttss2sq,
    gen_helper_cvtss2sq,
    gen_helper_cvttsd2sq,
    gen_helper_cvtsd2sq
};
#endif

static const SSEFunc_0_epp sse_op_table4[8][4] = {
    SSE_FOP(cmpeq),
    SSE_FOP(cmplt),
    SSE_FOP(cmple),
    SSE_FOP(cmpunord),
    SSE_FOP(cmpneq),
    SSE_FOP(cmpnlt),
    SSE_FOP(cmpnle),
    SSE_FOP(cmpord),
};

static const SSEFunc_0_epp sse_op_table5[256] = {
    [0x0c] = gen_helper_pi2fw,
    [0x0d] = gen_helper_pi2fd,
    [0x1c] = gen_helper_pf2iw,
    [0x1d] = gen_helper_pf2id,
    [0x8a] = gen_helper_pfnacc,
    [0x8e] = gen_helper_pfpnacc,
    [0x90] = gen_helper_pfcmpge,
    [0x94] = gen_helper_pfmin,
    [0x96] = gen_helper_pfrcp,
    [0x97] = gen_helper_pfrsqrt,
    [0x9a] = gen_helper_pfsub,
    [0x9e] = gen_helper_pfadd,
    [0xa0] = gen_helper_pfcmpgt,
    [0xa4] = gen_helper_pfmax,
    [0xa6] = gen_helper_movq, /* pfrcpit1; no need to actually increase precision */
    [0xa7] = gen_helper_movq, /* pfrsqit1 */
    [0xaa] = gen_helper_pfsubr,
    [0xae] = gen_helper_pfacc,
    [0xb0] = gen_helper_pfcmpeq,
    [0xb4] = gen_helper_pfmul,
    [0xb6] = gen_helper_movq, /* pfrcpit2 */
    [0xb7] = gen_helper_pmulhrw_mmx,
    [0xbb] = gen_helper_pswapd,
    [0xbf] = gen_helper_pavgb_mmx /* pavgusb */
};

struct SSEOpHelper_epp {
    SSEFunc_0_epp op[2];
    uint32_t ext_mask;
};

struct SSEOpHelper_eppi {
    SSEFunc_0_eppi op[2];
    uint32_t ext_mask;
};

#define SSSE3_OP(x) { MMX_OP2(x), CPUID_EXT_SSSE3 }
#define SSE41_OP(x) { { NULL, gen_helper_ ## x ## _xmm }, CPUID_EXT_SSE41 }
#define SSE42_OP(x) { { NULL, gen_helper_ ## x ## _xmm }, CPUID_EXT_SSE42 }
#define SSE41_SPECIAL { { NULL, SSE_SPECIAL }, CPUID_EXT_SSE41 }

static const struct SSEOpHelper_epp sse_op_table6[256] = {
    [0x00] = SSSE3_OP(pshufb),
    [0x01] = SSSE3_OP(phaddw),
    [0x02] = SSSE3_OP(phaddd),
    [0x03] = SSSE3_OP(phaddsw),
    [0x04] = SSSE3_OP(pmaddubsw),
    [0x05] = SSSE3_OP(phsubw),
    [0x06] = SSSE3_OP(phsubd),
    [0x07] = SSSE3_OP(phsubsw),
    [0x08] = SSSE3_OP(psignb),
    [0x09] = SSSE3_OP(psignw),
    [0x0a] = SSSE3_OP(psignd),
    [0x0b] = SSSE3_OP(pmulhrsw),
    [0x10] = SSE41_OP(pblendvb),
    [0x14] = SSE41_OP(blendvps),
    [0x15] = SSE41_OP(blendvpd),
    [0x17] = SSE41_OP(ptest),
    [0x1c] = SSSE3_OP(pabsb),
    [0x1d] = SSSE3_OP(pabsw),
    [0x1e] = SSSE3_OP(pabsd),
    [0x20] = SSE41_OP(pmovsxbw),
    [0x21] = SSE41_OP(pmovsxbd),
    [0x22] = SSE41_OP(pmovsxbq),
    [0x23] = SSE41_OP(pmovsxwd),
    [0x24] = SSE41_OP(pmovsxwq),
    [0x25] = SSE41_OP(pmovsxdq),
    [0x28] = SSE41_OP(pmuldq),
    [0x29] = SSE41_OP(pcmpeqq),
    [0x2a] = SSE41_SPECIAL, /* movntqda */
    [0x2b] = SSE41_OP(packusdw),
    [0x30] = SSE41_OP(pmovzxbw),
    [0x31] = SSE41_OP(pmovzxbd),
    [0x32] = SSE41_OP(pmovzxbq),
    [0x33] = SSE41_OP(pmovzxwd),
    [0x34] = SSE41_OP(pmovzxwq),
    [0x35] = SSE41_OP(pmovzxdq),
    [0x37] = SSE42_OP(pcmpgtq),
    [0x38] = SSE41_OP(pminsb),
    [0x39] = SSE41_OP(pminsd),
    [0x3a] = SSE41_OP(pminuw),
    [0x3b] = SSE41_OP(pminud),
    [0x3c] = SSE41_OP(pmaxsb),
    [0x3d] = SSE41_OP(pmaxsd),
    [0x3e] = SSE41_OP(pmaxuw),
    [0x3f] = SSE41_OP(pmaxud),
    [0x40] = SSE41_OP(pmulld),
    [0x41] = SSE41_OP(phminposuw),
};

static const struct SSEOpHelper_eppi sse_op_table7[256] = {
    [0x08] = SSE41_OP(roundps),
    [0x09] = SSE41_OP(roundpd),
    [0x0a] = SSE41_OP(roundss),
    [0x0b] = SSE41_OP(roundsd),
    [0x0c] = SSE41_OP(blendps),
    [0x0d] = SSE41_OP(blendpd),
    [0x0e] = SSE41_OP(pblendw),
    [0x0f] = SSSE3_OP(palignr),
    [0x14] = SSE41_SPECIAL, /* pextrb */
    [0x15] = SSE41_SPECIAL, /* pextrw */
    [0x16] = SSE41_SPECIAL, /* pextrd/pextrq */
    [0x17] = SSE41_SPECIAL, /* extractps */
    [0x20] = SSE41_SPECIAL, /* pinsrb */
    [0x21] = SSE41_SPECIAL, /* insertps */
    [0x22] = SSE41_SPECIAL, /* pinsrd/pinsrq */
    [0x40] = SSE41_OP(dpps),
    [0x41] = SSE41_OP(dppd),
    [0x42] = SSE41_OP(mpsadbw),
    [0x60] = SSE42_OP(pcmpestrm),
    [0x61] = SSE42_OP(pcmpestri),
    [0x62] = SSE42_OP(pcmpistrm),
    [0x63] = SSE42_OP(pcmpistri),
};

static void gen_sse(CPUX86State *env, DisasContext *s, int b,
                    target_ulong pc_start, int rex_r)
{
    int b1, op1_offset, op2_offset, is_xmm, val, ot;
    int modrm, mod, rm, reg, reg_addr, offset_addr;
    SSEFunc_0_epp sse_fn_epp;
    SSEFunc_0_eppi sse_fn_eppi;
    SSEFunc_0_ppi sse_fn_ppi;
    SSEFunc_0_eppt sse_fn_eppt;

    b &= 0xff;
    if (s->prefix & PREFIX_DATA)
        b1 = 1;
    else if (s->prefix & PREFIX_REPZ)
        b1 = 2;
    else if (s->prefix & PREFIX_REPNZ)
        b1 = 3;
    else
        b1 = 0;
    sse_fn_epp = sse_op_table1[b][b1];
    if (!sse_fn_epp) {
        goto illegal_op;
    }
    if ((b <= 0x5f && b >= 0x10) || b == 0xc6 || b == 0xc2) {
        is_xmm = 1;
    } else {
        if (b1 == 0) {
            /* MMX case */
            is_xmm = 0;
        } else {
            is_xmm = 1;
        }
    }
    /* simple MMX/SSE operation */
    if (s->flags & HF_TS_MASK) {
        gen_exception(s, EXCP07_PREX, pc_start - s->cs_base);
        return;
    }
    if (s->flags & HF_EM_MASK) {
    illegal_op:
        gen_exception(s, EXCP06_ILLOP, pc_start - s->cs_base);
        return;
    }
    if (is_xmm && !(s->flags & HF_OSFXSR_MASK))
        if ((b != 0x38 && b != 0x3a) || (s->prefix & PREFIX_DATA))
            goto illegal_op;
    if (b == 0x0e) {
        if (!(s->cpuid_ext2_features & CPUID_EXT2_3DNOW))
            goto illegal_op;
        /* femms */
        gen_helper_emms(cpu_env);
        return;
    }
    if (b == 0x77) {
        /* emms */
        gen_helper_emms(cpu_env);
        return;
    }
    /* prepare MMX state (XXX: optimize by storing fptt and fptags in
       the static cpu state) */
    if (!is_xmm) {
        gen_helper_enter_mmx(cpu_env);
    }

    modrm = cpu_ldub_code(env, s->pc++);
    reg = ((modrm >> 3) & 7);
    if (is_xmm)
        reg |= rex_r;
    mod = (modrm >> 6) & 3;
    if (sse_fn_epp == SSE_SPECIAL) {
        b |= (b1 << 8);
        switch(b) {
        case 0x0e7: /* movntq */
            if (mod == 3)
                goto illegal_op;
            gen_lea_modrm(env, s, modrm, &reg_addr, &offset_addr);
            gen_stq_env_A0(s->mem_index, offsetof(CPUX86State,fpregs[reg].mmx));
            break;
        case 0x1e7: /* movntdq */
        case 0x02b: /* movntps */
        case 0x12b: /* movntps */
            if (mod == 3)
                goto illegal_op;
            gen_lea_modrm(env, s, modrm, &reg_addr, &offset_addr);
            gen_sto_env_A0(s->mem_index, offsetof(CPUX86State,xmm_regs[reg]));
            break;
        case 0x3f0: /* lddqu */
            if (mod == 3)
                goto illegal_op;
            gen_lea_modrm(env, s, modrm, &reg_addr, &offset_addr);
            gen_ldo_env_A0(s->mem_index, offsetof(CPUX86State,xmm_regs[reg]));
            break;
        case 0x22b: /* movntss */
        case 0x32b: /* movntsd */
            if (mod == 3)
                goto illegal_op;
            gen_lea_modrm(env, s, modrm, &reg_addr, &offset_addr);
            if (b1 & 1) {
                gen_stq_env_A0(s->mem_index, offsetof(CPUX86State,
                    xmm_regs[reg]));
            } else {
                tcg_gen_ld32u_tl(cpu_T[0], cpu_env, offsetof(CPUX86State,
                    xmm_regs[reg].XMM_L(0)));
                gen_op_st_T0_A0(OT_LONG + s->mem_index);
            }
            break;
        case 0x6e: /* movd mm, ea */
#ifdef TARGET_X86_64
            if (s->dflag == 2) {
                gen_ldst_modrm(env, s, modrm, OT_QUAD, OR_TMP0, 0);
                tcg_gen_st_tl(cpu_T[0], cpu_env, offsetof(CPUX86State,fpregs[reg].mmx));
            } else
#endif
            {
                gen_ldst_modrm(env, s, modrm, OT_LONG, OR_TMP0, 0);
                tcg_gen_addi_ptr(cpu_ptr0, cpu_env, 
                                 offsetof(CPUX86State,fpregs[reg].mmx));
                tcg_gen_trunc_tl_i32(cpu_tmp2_i32, cpu_T[0]);
                gen_helper_movl_mm_T0_mmx(cpu_ptr0, cpu_tmp2_i32);
            }
            break;
        case 0x16e: /* movd xmm, ea */
#ifdef TARGET_X86_64
            if (s->dflag == 2) {
                gen_ldst_modrm(env, s, modrm, OT_QUAD, OR_TMP0, 0);
                tcg_gen_addi_ptr(cpu_ptr0, cpu_env, 
                                 offsetof(CPUX86State,xmm_regs[reg]));
                gen_helper_movq_mm_T0_xmm(cpu_ptr0, cpu_T[0]);
            } else
#endif
            {
                gen_ldst_modrm(env, s, modrm, OT_LONG, OR_TMP0, 0);
                tcg_gen_addi_ptr(cpu_ptr0, cpu_env, 
                                 offsetof(CPUX86State,xmm_regs[reg]));
                tcg_gen_trunc_tl_i32(cpu_tmp2_i32, cpu_T[0]);
                gen_helper_movl_mm_T0_xmm(cpu_ptr0, cpu_tmp2_i32);
            }
            break;
        case 0x6f: /* movq mm, ea */
            if (mod != 3) {
                gen_lea_modrm(env, s, modrm, &reg_addr, &offset_addr);
                gen_ldq_env_A0(s->mem_index, offsetof(CPUX86State,fpregs[reg].mmx));
            } else {
                rm = (modrm & 7);
                tcg_gen_ld_i64(cpu_tmp1_i64, cpu_env,
                               offsetof(CPUX86State,fpregs[rm].mmx));
                tcg_gen_st_i64(cpu_tmp1_i64, cpu_env,
                               offsetof(CPUX86State,fpregs[reg].mmx));
            }
            break;
        case 0x010: /* movups */
        case 0x110: /* movupd */
        case 0x028: /* movaps */
        case 0x128: /* movapd */
        case 0x16f: /* movdqa xmm, ea */
        case 0x26f: /* movdqu xmm, ea */
            if (mod != 3) {
                gen_lea_modrm(env, s, modrm, &reg_addr, &offset_addr);
                gen_ldo_env_A0(s->mem_index, offsetof(CPUX86State,xmm_regs[reg]));
            } else {
                rm = (modrm & 7) | REX_B(s);
                gen_op_movo(offsetof(CPUX86State,xmm_regs[reg]),
                            offsetof(CPUX86State,xmm_regs[rm]));
            }
            break;
        case 0x210: /* movss xmm, ea */
            if (mod != 3) {
                gen_lea_modrm(env, s, modrm, &reg_addr, &offset_addr);
                gen_op_ld_T0_A0(OT_LONG + s->mem_index);
                tcg_gen_st32_tl(cpu_T[0], cpu_env, offsetof(CPUX86State,xmm_regs[reg].XMM_L(0)));
                gen_op_movl_T0_0();
                tcg_gen_st32_tl(cpu_T[0], cpu_env, offsetof(CPUX86State,xmm_regs[reg].XMM_L(1)));
                tcg_gen_st32_tl(cpu_T[0], cpu_env, offsetof(CPUX86State,xmm_regs[reg].XMM_L(2)));
                tcg_gen_st32_tl(cpu_T[0], cpu_env, offsetof(CPUX86State,xmm_regs[reg].XMM_L(3)));
            } else {
                rm = (modrm & 7) | REX_B(s);
                gen_op_movl(offsetof(CPUX86State,xmm_regs[reg].XMM_L(0)),
                            offsetof(CPUX86State,xmm_regs[rm].XMM_L(0)));
            }
            break;
        case 0x310: /* movsd xmm, ea */
            if (mod != 3) {
                gen_lea_modrm(env, s, modrm, &reg_addr, &offset_addr);
                gen_ldq_env_A0(s->mem_index, offsetof(CPUX86State,xmm_regs[reg].XMM_Q(0)));
                gen_op_movl_T0_0();
                tcg_gen_st32_tl(cpu_T[0], cpu_env, offsetof(CPUX86State,xmm_regs[reg].XMM_L(2)));
                tcg_gen_st32_tl(cpu_T[0], cpu_env, offsetof(CPUX86State,xmm_regs[reg].XMM_L(3)));
            } else {
                rm = (modrm & 7) | REX_B(s);
                gen_op_movq(offsetof(CPUX86State,xmm_regs[reg].XMM_Q(0)),
                            offsetof(CPUX86State,xmm_regs[rm].XMM_Q(0)));
            }
            break;
        case 0x012: /* movlps */
        case 0x112: /* movlpd */
            if (mod != 3) {
                gen_lea_modrm(env, s, modrm, &reg_addr, &offset_addr);
                gen_ldq_env_A0(s->mem_index, offsetof(CPUX86State,xmm_regs[reg].XMM_Q(0)));
            } else {
                /* movhlps */
                rm = (modrm & 7) | REX_B(s);
                gen_op_movq(offsetof(CPUX86State,xmm_regs[reg].XMM_Q(0)),
                            offsetof(CPUX86State,xmm_regs[rm].XMM_Q(1)));
            }
            break;
        case 0x212: /* movsldup */
            if (mod != 3) {
                gen_lea_modrm(env, s, modrm, &reg_addr, &offset_addr);
                gen_ldo_env_A0(s->mem_index, offsetof(CPUX86State,xmm_regs[reg]));
            } else {
                rm = (modrm & 7) | REX_B(s);
                gen_op_movl(offsetof(CPUX86State,xmm_regs[reg].XMM_L(0)),
                            offsetof(CPUX86State,xmm_regs[rm].XMM_L(0)));
                gen_op_movl(offsetof(CPUX86State,xmm_regs[reg].XMM_L(2)),
                            offsetof(CPUX86State,xmm_regs[rm].XMM_L(2)));
            }
            gen_op_movl(offsetof(CPUX86State,xmm_regs[reg].XMM_L(1)),
                        offsetof(CPUX86State,xmm_regs[reg].XMM_L(0)));
            gen_op_movl(offsetof(CPUX86State,xmm_regs[reg].XMM_L(3)),
                        offsetof(CPUX86State,xmm_regs[reg].XMM_L(2)));
            break;
        case 0x312: /* movddup */
            if (mod != 3) {
                gen_lea_modrm(env, s, modrm, &reg_addr, &offset_addr);
                gen_ldq_env_A0(s->mem_index, offsetof(CPUX86State,xmm_regs[reg].XMM_Q(0)));
            } else {
                rm = (modrm & 7) | REX_B(s);
                gen_op_movq(offsetof(CPUX86State,xmm_regs[reg].XMM_Q(0)),
                            offsetof(CPUX86State,xmm_regs[rm].XMM_Q(0)));
            }
            gen_op_movq(offsetof(CPUX86State,xmm_regs[reg].XMM_Q(1)),
                        offsetof(CPUX86State,xmm_regs[reg].XMM_Q(0)));
            break;
        case 0x016: /* movhps */
        case 0x116: /* movhpd */
            if (mod != 3) {
                gen_lea_modrm(env, s, modrm, &reg_addr, &offset_addr);
                gen_ldq_env_A0(s->mem_index, offsetof(CPUX86State,xmm_regs[reg].XMM_Q(1)));
            } else {
                /* movlhps */
                rm = (modrm & 7) | REX_B(s);
                gen_op_movq(offsetof(CPUX86State,xmm_regs[reg].XMM_Q(1)),
                            offsetof(CPUX86State,xmm_regs[rm].XMM_Q(0)));
            }
            break;
        case 0x216: /* movshdup */
            if (mod != 3) {
                gen_lea_modrm(env, s, modrm, &reg_addr, &offset_addr);
                gen_ldo_env_A0(s->mem_index, offsetof(CPUX86State,xmm_regs[reg]));
            } else {
                rm = (modrm & 7) | REX_B(s);
                gen_op_movl(offsetof(CPUX86State,xmm_regs[reg].XMM_L(1)),
                            offsetof(CPUX86State,xmm_regs[rm].XMM_L(1)));
                gen_op_movl(offsetof(CPUX86State,xmm_regs[reg].XMM_L(3)),
                            offsetof(CPUX86State,xmm_regs[rm].XMM_L(3)));
            }
            gen_op_movl(offsetof(CPUX86State,xmm_regs[reg].XMM_L(0)),
                        offsetof(CPUX86State,xmm_regs[reg].XMM_L(1)));
            gen_op_movl(offsetof(CPUX86State,xmm_regs[reg].XMM_L(2)),
                        offsetof(CPUX86State,xmm_regs[reg].XMM_L(3)));
            break;
        case 0x178:
        case 0x378:
            {
                int bit_index, field_length;

                if (b1 == 1 && reg != 0)
                    goto illegal_op;
                field_length = cpu_ldub_code(env, s->pc++) & 0x3F;
                bit_index = cpu_ldub_code(env, s->pc++) & 0x3F;
                tcg_gen_addi_ptr(cpu_ptr0, cpu_env,
                    offsetof(CPUX86State,xmm_regs[reg]));
                if (b1 == 1)
                    gen_helper_extrq_i(cpu_env, cpu_ptr0,
                                       tcg_const_i32(bit_index),
                                       tcg_const_i32(field_length));
                else
                    gen_helper_insertq_i(cpu_env, cpu_ptr0,
                                         tcg_const_i32(bit_index),
                                         tcg_const_i32(field_length));
            }
            break;
        case 0x7e: /* movd ea, mm */
#ifdef TARGET_X86_64
            if (s->dflag == 2) {
                tcg_gen_ld_i64(cpu_T[0], cpu_env, 
                               offsetof(CPUX86State,fpregs[reg].mmx));
                gen_ldst_modrm(env, s, modrm, OT_QUAD, OR_TMP0, 1);
            } else
#endif
            {
                tcg_gen_ld32u_tl(cpu_T[0], cpu_env, 
                                 offsetof(CPUX86State,fpregs[reg].mmx.MMX_L(0)));
                gen_ldst_modrm(env, s, modrm, OT_LONG, OR_TMP0, 1);
            }
            break;
        case 0x17e: /* movd ea, xmm */
#ifdef TARGET_X86_64
            if (s->dflag == 2) {
                tcg_gen_ld_i64(cpu_T[0], cpu_env, 
                               offsetof(CPUX86State,xmm_regs[reg].XMM_Q(0)));
                gen_ldst_modrm(env, s, modrm, OT_QUAD, OR_TMP0, 1);
            } else
#endif
            {
                tcg_gen_ld32u_tl(cpu_T[0], cpu_env, 
                                 offsetof(CPUX86State,xmm_regs[reg].XMM_L(0)));
                gen_ldst_modrm(env, s, modrm, OT_LONG, OR_TMP0, 1);
            }
            break;
        case 0x27e: /* movq xmm, ea */
            if (mod != 3) {
                gen_lea_modrm(env, s, modrm, &reg_addr, &offset_addr);
                gen_ldq_env_A0(s->mem_index, offsetof(CPUX86State,xmm_regs[reg].XMM_Q(0)));
            } else {
                rm = (modrm & 7) | REX_B(s);
                gen_op_movq(offsetof(CPUX86State,xmm_regs[reg].XMM_Q(0)),
                            offsetof(CPUX86State,xmm_regs[rm].XMM_Q(0)));
            }
            gen_op_movq_env_0(offsetof(CPUX86State,xmm_regs[reg].XMM_Q(1)));
            break;
        case 0x7f: /* movq ea, mm */
            if (mod != 3) {
                gen_lea_modrm(env, s, modrm, &reg_addr, &offset_addr);
                gen_stq_env_A0(s->mem_index, offsetof(CPUX86State,fpregs[reg].mmx));
            } else {
                rm = (modrm & 7);
                gen_op_movq(offsetof(CPUX86State,fpregs[rm].mmx),
                            offsetof(CPUX86State,fpregs[reg].mmx));
            }
            break;
        case 0x011: /* movups */
        case 0x111: /* movupd */
        case 0x029: /* movaps */
        case 0x129: /* movapd */
        case 0x17f: /* movdqa ea, xmm */
        case 0x27f: /* movdqu ea, xmm */
            if (mod != 3) {
                gen_lea_modrm(env, s, modrm, &reg_addr, &offset_addr);
                gen_sto_env_A0(s->mem_index, offsetof(CPUX86State,xmm_regs[reg]));
            } else {
                rm = (modrm & 7) | REX_B(s);
                gen_op_movo(offsetof(CPUX86State,xmm_regs[rm]),
                            offsetof(CPUX86State,xmm_regs[reg]));
            }
            break;
        case 0x211: /* movss ea, xmm */
            if (mod != 3) {
                gen_lea_modrm(env, s, modrm, &reg_addr, &offset_addr);
                tcg_gen_ld32u_tl(cpu_T[0], cpu_env, offsetof(CPUX86State,xmm_regs[reg].XMM_L(0)));
                gen_op_st_T0_A0(OT_LONG + s->mem_index);
            } else {
                rm = (modrm & 7) | REX_B(s);
                gen_op_movl(offsetof(CPUX86State,xmm_regs[rm].XMM_L(0)),
                            offsetof(CPUX86State,xmm_regs[reg].XMM_L(0)));
            }
            break;
        case 0x311: /* movsd ea, xmm */
            if (mod != 3) {
                gen_lea_modrm(env, s, modrm, &reg_addr, &offset_addr);
                gen_stq_env_A0(s->mem_index, offsetof(CPUX86State,xmm_regs[reg].XMM_Q(0)));
            } else {
                rm = (modrm & 7) | REX_B(s);
                gen_op_movq(offsetof(CPUX86State,xmm_regs[rm].XMM_Q(0)),
                            offsetof(CPUX86State,xmm_regs[reg].XMM_Q(0)));
            }
            break;
        case 0x013: /* movlps */
        case 0x113: /* movlpd */
            if (mod != 3) {
                gen_lea_modrm(env, s, modrm, &reg_addr, &offset_addr);
                gen_stq_env_A0(s->mem_index, offsetof(CPUX86State,xmm_regs[reg].XMM_Q(0)));
            } else {
                goto illegal_op;
            }
            break;
        case 0x017: /* movhps */
        case 0x117: /* movhpd */
            if (mod != 3) {
                gen_lea_modrm(env, s, modrm, &reg_addr, &offset_addr);
                gen_stq_env_A0(s->mem_index, offsetof(CPUX86State,xmm_regs[reg].XMM_Q(1)));
            } else {
                goto illegal_op;
            }
            break;
        case 0x71: /* shift mm, im */
        case 0x72:
        case 0x73:
        case 0x171: /* shift xmm, im */
        case 0x172:
        case 0x173:
            if (b1 >= 2) {
                goto illegal_op;
            }
            val = cpu_ldub_code(env, s->pc++);
            if (is_xmm) {
                gen_op_movl_T0_im(val);
                tcg_gen_st32_tl(cpu_T[0], cpu_env, offsetof(CPUX86State,xmm_t0.XMM_L(0)));
                gen_op_movl_T0_0();
                tcg_gen_st32_tl(cpu_T[0], cpu_env, offsetof(CPUX86State,xmm_t0.XMM_L(1)));
                op1_offset = offsetof(CPUX86State,xmm_t0);
            } else {
                gen_op_movl_T0_im(val);
                tcg_gen_st32_tl(cpu_T[0], cpu_env, offsetof(CPUX86State,mmx_t0.MMX_L(0)));
                gen_op_movl_T0_0();
                tcg_gen_st32_tl(cpu_T[0], cpu_env, offsetof(CPUX86State,mmx_t0.MMX_L(1)));
                op1_offset = offsetof(CPUX86State,mmx_t0);
            }
            sse_fn_epp = sse_op_table2[((b - 1) & 3) * 8 +
                                       (((modrm >> 3)) & 7)][b1];
            if (!sse_fn_epp) {
                goto illegal_op;
            }
            if (is_xmm) {
                rm = (modrm & 7) | REX_B(s);
                op2_offset = offsetof(CPUX86State,xmm_regs[rm]);
            } else {
                rm = (modrm & 7);
                op2_offset = offsetof(CPUX86State,fpregs[rm].mmx);
            }
            tcg_gen_addi_ptr(cpu_ptr0, cpu_env, op2_offset);
            tcg_gen_addi_ptr(cpu_ptr1, cpu_env, op1_offset);
            sse_fn_epp(cpu_env, cpu_ptr0, cpu_ptr1);
            break;
        case 0x050: /* movmskps */
            rm = (modrm & 7) | REX_B(s);
            tcg_gen_addi_ptr(cpu_ptr0, cpu_env, 
                             offsetof(CPUX86State,xmm_regs[rm]));
            gen_helper_movmskps(cpu_tmp2_i32, cpu_env, cpu_ptr0);
            tcg_gen_extu_i32_tl(cpu_T[0], cpu_tmp2_i32);
            gen_op_mov_reg_T0(OT_LONG, reg);
            break;
        case 0x150: /* movmskpd */
            rm = (modrm & 7) | REX_B(s);
            tcg_gen_addi_ptr(cpu_ptr0, cpu_env, 
                             offsetof(CPUX86State,xmm_regs[rm]));
            gen_helper_movmskpd(cpu_tmp2_i32, cpu_env, cpu_ptr0);
            tcg_gen_extu_i32_tl(cpu_T[0], cpu_tmp2_i32);
            gen_op_mov_reg_T0(OT_LONG, reg);
            break;
        case 0x02a: /* cvtpi2ps */
        case 0x12a: /* cvtpi2pd */
            gen_helper_enter_mmx(cpu_env);
            if (mod != 3) {
                gen_lea_modrm(env, s, modrm, &reg_addr, &offset_addr);
                op2_offset = offsetof(CPUX86State,mmx_t0);
                gen_ldq_env_A0(s->mem_index, op2_offset);
            } else {
                rm = (modrm & 7);
                op2_offset = offsetof(CPUX86State,fpregs[rm].mmx);
            }
            op1_offset = offsetof(CPUX86State,xmm_regs[reg]);
            tcg_gen_addi_ptr(cpu_ptr0, cpu_env, op1_offset);
            tcg_gen_addi_ptr(cpu_ptr1, cpu_env, op2_offset);
            switch(b >> 8) {
            case 0x0:
                gen_helper_cvtpi2ps(cpu_env, cpu_ptr0, cpu_ptr1);
                break;
            default:
            case 0x1:
                gen_helper_cvtpi2pd(cpu_env, cpu_ptr0, cpu_ptr1);
                break;
            }
            break;
        case 0x22a: /* cvtsi2ss */
        case 0x32a: /* cvtsi2sd */
            ot = (s->dflag == 2) ? OT_QUAD : OT_LONG;
            gen_ldst_modrm(env, s, modrm, ot, OR_TMP0, 0);
            op1_offset = offsetof(CPUX86State,xmm_regs[reg]);
            tcg_gen_addi_ptr(cpu_ptr0, cpu_env, op1_offset);
            if (ot == OT_LONG) {
                SSEFunc_0_epi sse_fn_epi = sse_op_table3ai[(b >> 8) & 1];
                tcg_gen_trunc_tl_i32(cpu_tmp2_i32, cpu_T[0]);
                sse_fn_epi(cpu_env, cpu_ptr0, cpu_tmp2_i32);
            } else {
#ifdef TARGET_X86_64
                SSEFunc_0_epl sse_fn_epl = sse_op_table3aq[(b >> 8) & 1];
                sse_fn_epl(cpu_env, cpu_ptr0, cpu_T[0]);
#else
                goto illegal_op;
#endif
            }
            break;
        case 0x02c: /* cvttps2pi */
        case 0x12c: /* cvttpd2pi */
        case 0x02d: /* cvtps2pi */
        case 0x12d: /* cvtpd2pi */
            gen_helper_enter_mmx(cpu_env);
            if (mod != 3) {
                gen_lea_modrm(env, s, modrm, &reg_addr, &offset_addr);
                op2_offset = offsetof(CPUX86State,xmm_t0);
                gen_ldo_env_A0(s->mem_index, op2_offset);
            } else {
                rm = (modrm & 7) | REX_B(s);
                op2_offset = offsetof(CPUX86State,xmm_regs[rm]);
            }
            op1_offset = offsetof(CPUX86State,fpregs[reg & 7].mmx);
            tcg_gen_addi_ptr(cpu_ptr0, cpu_env, op1_offset);
            tcg_gen_addi_ptr(cpu_ptr1, cpu_env, op2_offset);
            switch(b) {
            case 0x02c:
                gen_helper_cvttps2pi(cpu_env, cpu_ptr0, cpu_ptr1);
                break;
            case 0x12c:
                gen_helper_cvttpd2pi(cpu_env, cpu_ptr0, cpu_ptr1);
                break;
            case 0x02d:
                gen_helper_cvtps2pi(cpu_env, cpu_ptr0, cpu_ptr1);
                break;
            case 0x12d:
                gen_helper_cvtpd2pi(cpu_env, cpu_ptr0, cpu_ptr1);
                break;
            }
            break;
        case 0x22c: /* cvttss2si */
        case 0x32c: /* cvttsd2si */
        case 0x22d: /* cvtss2si */
        case 0x32d: /* cvtsd2si */
            ot = (s->dflag == 2) ? OT_QUAD : OT_LONG;
            if (mod != 3) {
                gen_lea_modrm(env, s, modrm, &reg_addr, &offset_addr);
                if ((b >> 8) & 1) {
                    gen_ldq_env_A0(s->mem_index, offsetof(CPUX86State,xmm_t0.XMM_Q(0)));
                } else {
                    gen_op_ld_T0_A0(OT_LONG + s->mem_index);
                    tcg_gen_st32_tl(cpu_T[0], cpu_env, offsetof(CPUX86State,xmm_t0.XMM_L(0)));
                }
                op2_offset = offsetof(CPUX86State,xmm_t0);
            } else {
                rm = (modrm & 7) | REX_B(s);
                op2_offset = offsetof(CPUX86State,xmm_regs[rm]);
            }
            tcg_gen_addi_ptr(cpu_ptr0, cpu_env, op2_offset);
            if (ot == OT_LONG) {
                SSEFunc_i_ep sse_fn_i_ep =
                    sse_op_table3bi[((b >> 7) & 2) | (b & 1)];
                sse_fn_i_ep(cpu_tmp2_i32, cpu_env, cpu_ptr0);
                tcg_gen_extu_i32_tl(cpu_T[0], cpu_tmp2_i32);
            } else {
#ifdef TARGET_X86_64
                SSEFunc_l_ep sse_fn_l_ep =
                    sse_op_table3bq[((b >> 7) & 2) | (b & 1)];
                sse_fn_l_ep(cpu_T[0], cpu_env, cpu_ptr0);
#else
                goto illegal_op;
#endif
            }
            gen_op_mov_reg_T0(ot, reg);
            break;
        case 0xc4: /* pinsrw */
        case 0x1c4:
            s->rip_offset = 1;
            gen_ldst_modrm(env, s, modrm, OT_WORD, OR_TMP0, 0);
            val = cpu_ldub_code(env, s->pc++);
            if (b1) {
                val &= 7;
                tcg_gen_st16_tl(cpu_T[0], cpu_env,
                                offsetof(CPUX86State,xmm_regs[reg].XMM_W(val)));
            } else {
                val &= 3;
                tcg_gen_st16_tl(cpu_T[0], cpu_env,
                                offsetof(CPUX86State,fpregs[reg].mmx.MMX_W(val)));
            }
            break;
        case 0xc5: /* pextrw */
        case 0x1c5:
            if (mod != 3)
                goto illegal_op;
            ot = (s->dflag == 2) ? OT_QUAD : OT_LONG;
            val = cpu_ldub_code(env, s->pc++);
            if (b1) {
                val &= 7;
                rm = (modrm & 7) | REX_B(s);
                tcg_gen_ld16u_tl(cpu_T[0], cpu_env,
                                 offsetof(CPUX86State,xmm_regs[rm].XMM_W(val)));
            } else {
                val &= 3;
                rm = (modrm & 7);
                tcg_gen_ld16u_tl(cpu_T[0], cpu_env,
                                offsetof(CPUX86State,fpregs[rm].mmx.MMX_W(val)));
            }
            reg = ((modrm >> 3) & 7) | rex_r;
            gen_op_mov_reg_T0(ot, reg);
            break;
        case 0x1d6: /* movq ea, xmm */
            if (mod != 3) {
                gen_lea_modrm(env, s, modrm, &reg_addr, &offset_addr);
                gen_stq_env_A0(s->mem_index, offsetof(CPUX86State,xmm_regs[reg].XMM_Q(0)));
            } else {
                rm = (modrm & 7) | REX_B(s);
                gen_op_movq(offsetof(CPUX86State,xmm_regs[rm].XMM_Q(0)),
                            offsetof(CPUX86State,xmm_regs[reg].XMM_Q(0)));
                gen_op_movq_env_0(offsetof(CPUX86State,xmm_regs[rm].XMM_Q(1)));
            }
            break;
        case 0x2d6: /* movq2dq */
            gen_helper_enter_mmx(cpu_env);
            rm = (modrm & 7);
            gen_op_movq(offsetof(CPUX86State,xmm_regs[reg].XMM_Q(0)),
                        offsetof(CPUX86State,fpregs[rm].mmx));
            gen_op_movq_env_0(offsetof(CPUX86State,xmm_regs[reg].XMM_Q(1)));
            break;
        case 0x3d6: /* movdq2q */
            gen_helper_enter_mmx(cpu_env);
            rm = (modrm & 7) | REX_B(s);
            gen_op_movq(offsetof(CPUX86State,fpregs[reg & 7].mmx),
                        offsetof(CPUX86State,xmm_regs[rm].XMM_Q(0)));
            break;
        case 0xd7: /* pmovmskb */
        case 0x1d7:
            if (mod != 3)
                goto illegal_op;
            if (b1) {
                rm = (modrm & 7) | REX_B(s);
                tcg_gen_addi_ptr(cpu_ptr0, cpu_env, offsetof(CPUX86State,xmm_regs[rm]));
                gen_helper_pmovmskb_xmm(cpu_tmp2_i32, cpu_env, cpu_ptr0);
            } else {
                rm = (modrm & 7);
                tcg_gen_addi_ptr(cpu_ptr0, cpu_env, offsetof(CPUX86State,fpregs[rm].mmx));
                gen_helper_pmovmskb_mmx(cpu_tmp2_i32, cpu_env, cpu_ptr0);
            }
            tcg_gen_extu_i32_tl(cpu_T[0], cpu_tmp2_i32);
            reg = ((modrm >> 3) & 7) | rex_r;
            gen_op_mov_reg_T0(OT_LONG, reg);
            break;
        case 0x138:
            if (s->prefix & PREFIX_REPNZ)
                goto crc32;
        case 0x038:
            b = modrm;
            modrm = cpu_ldub_code(env, s->pc++);
            rm = modrm & 7;
            reg = ((modrm >> 3) & 7) | rex_r;
            mod = (modrm >> 6) & 3;
            if (b1 >= 2) {
                goto illegal_op;
            }

            sse_fn_epp = sse_op_table6[b].op[b1];
            if (!sse_fn_epp) {
                goto illegal_op;
            }
            if (!(s->cpuid_ext_features & sse_op_table6[b].ext_mask))
                goto illegal_op;

            if (b1) {
                op1_offset = offsetof(CPUX86State,xmm_regs[reg]);
                if (mod == 3) {
                    op2_offset = offsetof(CPUX86State,xmm_regs[rm | REX_B(s)]);
                } else {
                    op2_offset = offsetof(CPUX86State,xmm_t0);
                    gen_lea_modrm(env, s, modrm, &reg_addr, &offset_addr);
                    switch (b) {
                    case 0x20: case 0x30: /* pmovsxbw, pmovzxbw */
                    case 0x23: case 0x33: /* pmovsxwd, pmovzxwd */
                    case 0x25: case 0x35: /* pmovsxdq, pmovzxdq */
                        gen_ldq_env_A0(s->mem_index, op2_offset +
                                        offsetof(XMMReg, XMM_Q(0)));
                        break;
                    case 0x21: case 0x31: /* pmovsxbd, pmovzxbd */
                    case 0x24: case 0x34: /* pmovsxwq, pmovzxwq */
                        tcg_gen_qemu_ld32u(cpu_tmp0, cpu_A0,
                                          (s->mem_index >> 2) - 1);
                        tcg_gen_trunc_tl_i32(cpu_tmp2_i32, cpu_tmp0);
                        tcg_gen_st_i32(cpu_tmp2_i32, cpu_env, op2_offset +
                                        offsetof(XMMReg, XMM_L(0)));
                        break;
                    case 0x22: case 0x32: /* pmovsxbq, pmovzxbq */
                        tcg_gen_qemu_ld16u(cpu_tmp0, cpu_A0,
                                          (s->mem_index >> 2) - 1);
                        tcg_gen_st16_tl(cpu_tmp0, cpu_env, op2_offset +
                                        offsetof(XMMReg, XMM_W(0)));
                        break;
                    case 0x2a:            /* movntqda */
                        gen_ldo_env_A0(s->mem_index, op1_offset);
                        return;
                    default:
                        gen_ldo_env_A0(s->mem_index, op2_offset);
                    }
                }
            } else {
                op1_offset = offsetof(CPUX86State,fpregs[reg].mmx);
                if (mod == 3) {
                    op2_offset = offsetof(CPUX86State,fpregs[rm].mmx);
                } else {
                    op2_offset = offsetof(CPUX86State,mmx_t0);
                    gen_lea_modrm(env, s, modrm, &reg_addr, &offset_addr);
                    gen_ldq_env_A0(s->mem_index, op2_offset);
                }
            }
            if (sse_fn_epp == SSE_SPECIAL) {
                goto illegal_op;
            }

            tcg_gen_addi_ptr(cpu_ptr0, cpu_env, op1_offset);
            tcg_gen_addi_ptr(cpu_ptr1, cpu_env, op2_offset);
            sse_fn_epp(cpu_env, cpu_ptr0, cpu_ptr1);

            if (b == 0x17) {
                set_cc_op(s, CC_OP_EFLAGS);
            }
            break;
        case 0x338: /* crc32 */
        crc32:
            b = modrm;
            modrm = cpu_ldub_code(env, s->pc++);
            reg = ((modrm >> 3) & 7) | rex_r;

            if (b != 0xf0 && b != 0xf1)
                goto illegal_op;
            if (!(s->cpuid_ext_features & CPUID_EXT_SSE42))
                goto illegal_op;

            if (b == 0xf0)
                ot = OT_BYTE;
            else if (b == 0xf1 && s->dflag != 2)
                if (s->prefix & PREFIX_DATA)
                    ot = OT_WORD;
                else
                    ot = OT_LONG;
            else
                ot = OT_QUAD;

            gen_op_mov_TN_reg(OT_LONG, 0, reg);
            tcg_gen_trunc_tl_i32(cpu_tmp2_i32, cpu_T[0]);
            gen_ldst_modrm(env, s, modrm, ot, OR_TMP0, 0);
            gen_helper_crc32(cpu_T[0], cpu_tmp2_i32,
                             cpu_T[0], tcg_const_i32(8 << ot));

            ot = (s->dflag == 2) ? OT_QUAD : OT_LONG;
            gen_op_mov_reg_T0(ot, reg);
            break;
        case 0x03a:
        case 0x13a:
            b = modrm;
            modrm = cpu_ldub_code(env, s->pc++);
            rm = modrm & 7;
            reg = ((modrm >> 3) & 7) | rex_r;
            mod = (modrm >> 6) & 3;
            if (b1 >= 2) {
                goto illegal_op;
            }

            sse_fn_eppi = sse_op_table7[b].op[b1];
            if (!sse_fn_eppi) {
                goto illegal_op;
            }
            if (!(s->cpuid_ext_features & sse_op_table7[b].ext_mask))
                goto illegal_op;

            if (sse_fn_eppi == SSE_SPECIAL) {
                ot = (s->dflag == 2) ? OT_QUAD : OT_LONG;
                rm = (modrm & 7) | REX_B(s);
                if (mod != 3)
                    gen_lea_modrm(env, s, modrm, &reg_addr, &offset_addr);
                reg = ((modrm >> 3) & 7) | rex_r;
                val = cpu_ldub_code(env, s->pc++);
                switch (b) {
                case 0x14: /* pextrb */
                    tcg_gen_ld8u_tl(cpu_T[0], cpu_env, offsetof(CPUX86State,
                                            xmm_regs[reg].XMM_B(val & 15)));
                    if (mod == 3)
                        gen_op_mov_reg_T0(ot, rm);
                    else
                        tcg_gen_qemu_st8(cpu_T[0], cpu_A0,
                                        (s->mem_index >> 2) - 1);
                    break;
                case 0x15: /* pextrw */
                    tcg_gen_ld16u_tl(cpu_T[0], cpu_env, offsetof(CPUX86State,
                                            xmm_regs[reg].XMM_W(val & 7)));
                    if (mod == 3)
                        gen_op_mov_reg_T0(ot, rm);
                    else
                        tcg_gen_qemu_st16(cpu_T[0], cpu_A0,
                                        (s->mem_index >> 2) - 1);
                    break;
                case 0x16:
                    if (ot == OT_LONG) { /* pextrd */
                        tcg_gen_ld_i32(cpu_tmp2_i32, cpu_env,
                                        offsetof(CPUX86State,
                                                xmm_regs[reg].XMM_L(val & 3)));
                        tcg_gen_extu_i32_tl(cpu_T[0], cpu_tmp2_i32);
                        if (mod == 3)
                            gen_op_mov_reg_v(ot, rm, cpu_T[0]);
                        else
                            tcg_gen_qemu_st32(cpu_T[0], cpu_A0,
                                            (s->mem_index >> 2) - 1);
                    } else { /* pextrq */
#ifdef TARGET_X86_64
                        tcg_gen_ld_i64(cpu_tmp1_i64, cpu_env,
                                        offsetof(CPUX86State,
                                                xmm_regs[reg].XMM_Q(val & 1)));
                        if (mod == 3)
                            gen_op_mov_reg_v(ot, rm, cpu_tmp1_i64);
                        else
                            tcg_gen_qemu_st64(cpu_tmp1_i64, cpu_A0,
                                            (s->mem_index >> 2) - 1);
#else
                        goto illegal_op;
#endif
                    }
                    break;
                case 0x17: /* extractps */
                    tcg_gen_ld32u_tl(cpu_T[0], cpu_env, offsetof(CPUX86State,
                                            xmm_regs[reg].XMM_L(val & 3)));
                    if (mod == 3)
                        gen_op_mov_reg_T0(ot, rm);
                    else
                        tcg_gen_qemu_st32(cpu_T[0], cpu_A0,
                                        (s->mem_index >> 2) - 1);
                    break;
                case 0x20: /* pinsrb */
                    if (mod == 3)
                        gen_op_mov_TN_reg(OT_LONG, 0, rm);
                    else
                        tcg_gen_qemu_ld8u(cpu_tmp0, cpu_A0,
                                        (s->mem_index >> 2) - 1);
                    tcg_gen_st8_tl(cpu_tmp0, cpu_env, offsetof(CPUX86State,
                                            xmm_regs[reg].XMM_B(val & 15)));
                    break;
                case 0x21: /* insertps */
                    if (mod == 3) {
                        tcg_gen_ld_i32(cpu_tmp2_i32, cpu_env,
                                        offsetof(CPUX86State,xmm_regs[rm]
                                                .XMM_L((val >> 6) & 3)));
                    } else {
                        tcg_gen_qemu_ld32u(cpu_tmp0, cpu_A0,
                                        (s->mem_index >> 2) - 1);
                        tcg_gen_trunc_tl_i32(cpu_tmp2_i32, cpu_tmp0);
                    }
                    tcg_gen_st_i32(cpu_tmp2_i32, cpu_env,
                                    offsetof(CPUX86State,xmm_regs[reg]
                                            .XMM_L((val >> 4) & 3)));
                    if ((val >> 0) & 1)
                        tcg_gen_st_i32(tcg_const_i32(0 /*float32_zero*/),
                                        cpu_env, offsetof(CPUX86State,
                                                xmm_regs[reg].XMM_L(0)));
                    if ((val >> 1) & 1)
                        tcg_gen_st_i32(tcg_const_i32(0 /*float32_zero*/),
                                        cpu_env, offsetof(CPUX86State,
                                                xmm_regs[reg].XMM_L(1)));
                    if ((val >> 2) & 1)
                        tcg_gen_st_i32(tcg_const_i32(0 /*float32_zero*/),
                                        cpu_env, offsetof(CPUX86State,
                                                xmm_regs[reg].XMM_L(2)));
                    if ((val >> 3) & 1)
                        tcg_gen_st_i32(tcg_const_i32(0 /*float32_zero*/),
                                        cpu_env, offsetof(CPUX86State,
                                                xmm_regs[reg].XMM_L(3)));
                    break;
                case 0x22:
                    if (ot == OT_LONG) { /* pinsrd */
                        if (mod == 3)
                            gen_op_mov_v_reg(ot, cpu_tmp0, rm);
                        else
                            tcg_gen_qemu_ld32u(cpu_tmp0, cpu_A0,
                                            (s->mem_index >> 2) - 1);
                        tcg_gen_trunc_tl_i32(cpu_tmp2_i32, cpu_tmp0);
                        tcg_gen_st_i32(cpu_tmp2_i32, cpu_env,
                                        offsetof(CPUX86State,
                                                xmm_regs[reg].XMM_L(val & 3)));
                    } else { /* pinsrq */
#ifdef TARGET_X86_64
                        if (mod == 3)
                            gen_op_mov_v_reg(ot, cpu_tmp1_i64, rm);
                        else
                            tcg_gen_qemu_ld64(cpu_tmp1_i64, cpu_A0,
                                            (s->mem_index >> 2) - 1);
                        tcg_gen_st_i64(cpu_tmp1_i64, cpu_env,
                                        offsetof(CPUX86State,
                                                xmm_regs[reg].XMM_Q(val & 1)));
#else
                        goto illegal_op;
#endif
                    }
                    break;
                }
                return;
            }

            if (b1) {
                op1_offset = offsetof(CPUX86State,xmm_regs[reg]);
                if (mod == 3) {
                    op2_offset = offsetof(CPUX86State,xmm_regs[rm | REX_B(s)]);
                } else {
                    op2_offset = offsetof(CPUX86State,xmm_t0);
                    gen_lea_modrm(env, s, modrm, &reg_addr, &offset_addr);
                    gen_ldo_env_A0(s->mem_index, op2_offset);
                }
            } else {
                op1_offset = offsetof(CPUX86State,fpregs[reg].mmx);
                if (mod == 3) {
                    op2_offset = offsetof(CPUX86State,fpregs[rm].mmx);
                } else {
                    op2_offset = offsetof(CPUX86State,mmx_t0);
                    gen_lea_modrm(env, s, modrm, &reg_addr, &offset_addr);
                    gen_ldq_env_A0(s->mem_index, op2_offset);
                }
            }
            val = cpu_ldub_code(env, s->pc++);

            if ((b & 0xfc) == 0x60) { /* pcmpXstrX */
                set_cc_op(s, CC_OP_EFLAGS);

                if (s->dflag == 2)
                    /* The helper must use entire 64-bit gp registers */
                    val |= 1 << 8;
            }

            tcg_gen_addi_ptr(cpu_ptr0, cpu_env, op1_offset);
            tcg_gen_addi_ptr(cpu_ptr1, cpu_env, op2_offset);
            sse_fn_eppi(cpu_env, cpu_ptr0, cpu_ptr1, tcg_const_i32(val));
            break;
        default:
            goto illegal_op;
        }
    } else {
        /* generic MMX or SSE operation */
        switch(b) {
        case 0x70: /* pshufx insn */
        case 0xc6: /* pshufx insn */
        case 0xc2: /* compare insns */
            s->rip_offset = 1;
            break;
        default:
            break;
        }
        if (is_xmm) {
            op1_offset = offsetof(CPUX86State,xmm_regs[reg]);
            if (mod != 3) {
                gen_lea_modrm(env, s, modrm, &reg_addr, &offset_addr);
                op2_offset = offsetof(CPUX86State,xmm_t0);
                if (b1 >= 2 && ((b >= 0x50 && b <= 0x5f && b != 0x5b) ||
                                b == 0xc2)) {
                    /* specific case for SSE single instructions */
                    if (b1 == 2) {
                        /* 32 bit access */
                        gen_op_ld_T0_A0(OT_LONG + s->mem_index);
                        tcg_gen_st32_tl(cpu_T[0], cpu_env, offsetof(CPUX86State,xmm_t0.XMM_L(0)));
                    } else {
                        /* 64 bit access */
                        gen_ldq_env_A0(s->mem_index, offsetof(CPUX86State,xmm_t0.XMM_D(0)));
                    }
                } else {
                    gen_ldo_env_A0(s->mem_index, op2_offset);
                }
            } else {
                rm = (modrm & 7) | REX_B(s);
                op2_offset = offsetof(CPUX86State,xmm_regs[rm]);
            }
        } else {
            op1_offset = offsetof(CPUX86State,fpregs[reg].mmx);
            if (mod != 3) {
                gen_lea_modrm(env, s, modrm, &reg_addr, &offset_addr);
                op2_offset = offsetof(CPUX86State,mmx_t0);
                gen_ldq_env_A0(s->mem_index, op2_offset);
            } else {
                rm = (modrm & 7);
                op2_offset = offsetof(CPUX86State,fpregs[rm].mmx);
            }
        }
        switch(b) {
        case 0x0f: /* 3DNow! data insns */
            if (!(s->cpuid_ext2_features & CPUID_EXT2_3DNOW))
                goto illegal_op;
            val = cpu_ldub_code(env, s->pc++);
            sse_fn_epp = sse_op_table5[val];
            if (!sse_fn_epp) {
                goto illegal_op;
            }
            tcg_gen_addi_ptr(cpu_ptr0, cpu_env, op1_offset);
            tcg_gen_addi_ptr(cpu_ptr1, cpu_env, op2_offset);
            sse_fn_epp(cpu_env, cpu_ptr0, cpu_ptr1);
            break;
        case 0x70: /* pshufx insn */
        case 0xc6: /* pshufx insn */
            val = cpu_ldub_code(env, s->pc++);
            tcg_gen_addi_ptr(cpu_ptr0, cpu_env, op1_offset);
            tcg_gen_addi_ptr(cpu_ptr1, cpu_env, op2_offset);
            /* XXX: introduce a new table? */
            sse_fn_ppi = (SSEFunc_0_ppi)sse_fn_epp;
            sse_fn_ppi(cpu_ptr0, cpu_ptr1, tcg_const_i32(val));
            break;
        case 0xc2:
            /* compare insns */
            val = cpu_ldub_code(env, s->pc++);
            if (val >= 8)
                goto illegal_op;
            sse_fn_epp = sse_op_table4[val][b1];

            tcg_gen_addi_ptr(cpu_ptr0, cpu_env, op1_offset);
            tcg_gen_addi_ptr(cpu_ptr1, cpu_env, op2_offset);
            sse_fn_epp(cpu_env, cpu_ptr0, cpu_ptr1);
            break;
        case 0xf7:
            /* maskmov : we must prepare A0 */
            if (mod != 3)
                goto illegal_op;
#ifdef TARGET_X86_64
            if (s->aflag == 2) {
                gen_op_movq_A0_reg(R_EDI);
            } else
#endif
            {
                gen_op_movl_A0_reg(R_EDI);
                if (s->aflag == 0)
                    gen_op_andl_A0_ffff();
            }
            gen_add_A0_ds_seg(s);

            tcg_gen_addi_ptr(cpu_ptr0, cpu_env, op1_offset);
            tcg_gen_addi_ptr(cpu_ptr1, cpu_env, op2_offset);
            /* XXX: introduce a new table? */
            sse_fn_eppt = (SSEFunc_0_eppt)sse_fn_epp;
            sse_fn_eppt(cpu_env, cpu_ptr0, cpu_ptr1, cpu_A0);
            break;
        default:
            tcg_gen_addi_ptr(cpu_ptr0, cpu_env, op1_offset);
            tcg_gen_addi_ptr(cpu_ptr1, cpu_env, op2_offset);
            sse_fn_epp(cpu_env, cpu_ptr0, cpu_ptr1);
            break;
        }
        if (b == 0x2e || b == 0x2f) {
            set_cc_op(s, CC_OP_EFLAGS);
        }
    }
}

/* convert one instruction. s->is_jmp is set if the translation must
   be stopped. Return the next pc value */
static target_ulong disas_insn(CPUX86State *env, DisasContext *s,
                               target_ulong pc_start)
{
    int b, prefixes, aflag, dflag;
    int shift, ot;
    int modrm, reg, rm, mod, reg_addr, op, opreg, offset_addr, val;
    target_ulong next_eip, tval;
    int rex_w, rex_r;

    if (unlikely(qemu_loglevel_mask(CPU_LOG_TB_OP | CPU_LOG_TB_OP_OPT))) {
        tcg_gen_debug_insn_start(pc_start);
    }
    s->pc = pc_start;
    prefixes = 0;
    aflag = s->code32;
    dflag = s->code32;
    s->override = -1;
    rex_w = -1;
    rex_r = 0;
#ifdef TARGET_X86_64
    s->rex_x = 0;
    s->rex_b = 0;
    x86_64_hregs = 0;
#endif
    s->rip_offset = 0; /* for relative ip address */
 next_byte:
    b = cpu_ldub_code(env, s->pc);
    s->pc++;
    /* check prefixes */
#ifdef TARGET_X86_64
    if (CODE64(s)) {
        switch (b) {
        case 0xf3:
            prefixes |= PREFIX_REPZ;
            goto next_byte;
        case 0xf2:
            prefixes |= PREFIX_REPNZ;
            goto next_byte;
        case 0xf0:
            prefixes |= PREFIX_LOCK;
            goto next_byte;
        case 0x2e:
            s->override = R_CS;
            goto next_byte;
        case 0x36:
            s->override = R_SS;
            goto next_byte;
        case 0x3e:
            s->override = R_DS;
            goto next_byte;
        case 0x26:
            s->override = R_ES;
            goto next_byte;
        case 0x64:
            s->override = R_FS;
            goto next_byte;
        case 0x65:
            s->override = R_GS;
            goto next_byte;
        case 0x66:
            prefixes |= PREFIX_DATA;
            goto next_byte;
        case 0x67:
            prefixes |= PREFIX_ADR;
            goto next_byte;
        case 0x40 ... 0x4f:
            /* REX prefix */
            rex_w = (b >> 3) & 1;
            rex_r = (b & 0x4) << 1;
            s->rex_x = (b & 0x2) << 2;
            REX_B(s) = (b & 0x1) << 3;
            x86_64_hregs = 1; /* select uniform byte register addressing */
            goto next_byte;
        }
        if (rex_w == 1) {
            /* 0x66 is ignored if rex.w is set */
            dflag = 2;
        } else {
            if (prefixes & PREFIX_DATA)
                dflag ^= 1;
        }
        if (!(prefixes & PREFIX_ADR))
            aflag = 2;
    } else
#endif
    {
        switch (b) {
        case 0xf3:
            prefixes |= PREFIX_REPZ;
            goto next_byte;
        case 0xf2:
            prefixes |= PREFIX_REPNZ;
            goto next_byte;
        case 0xf0:
            prefixes |= PREFIX_LOCK;
            goto next_byte;
        case 0x2e:
            s->override = R_CS;
            goto next_byte;
        case 0x36:
            s->override = R_SS;
            goto next_byte;
        case 0x3e:
            s->override = R_DS;
            goto next_byte;
        case 0x26:
            s->override = R_ES;
            goto next_byte;
        case 0x64:
            s->override = R_FS;
            goto next_byte;
        case 0x65:
            s->override = R_GS;
            goto next_byte;
        case 0x66:
            prefixes |= PREFIX_DATA;
            goto next_byte;
        case 0x67:
            prefixes |= PREFIX_ADR;
            goto next_byte;
        }
        if (prefixes & PREFIX_DATA)
            dflag ^= 1;
        if (prefixes & PREFIX_ADR)
            aflag ^= 1;
    }

    s->prefix = prefixes;
    s->aflag = aflag;
    s->dflag = dflag;

    /* lock generation */
    if (prefixes & PREFIX_LOCK)
        gen_helper_lock();

    /* now check op code */
 reswitch:
    switch(b) {
    case 0x0f:
        /**************************/
        /* extended op code */
        b = cpu_ldub_code(env, s->pc++) | 0x100;
        goto reswitch;

        /**************************/
        /* arith & logic */
    case 0x00 ... 0x05:
    case 0x08 ... 0x0d:
    case 0x10 ... 0x15:
    case 0x18 ... 0x1d:
    case 0x20 ... 0x25:
    case 0x28 ... 0x2d:
    case 0x30 ... 0x35:
    case 0x38 ... 0x3d:
        {
            int op, f, val;
            op = (b >> 3) & 7;
            f = (b >> 1) & 3;

            if ((b & 1) == 0)
                ot = OT_BYTE;
            else
                ot = dflag + OT_WORD;

            switch(f) {
            case 0: /* OP Ev, Gv */
                modrm = cpu_ldub_code(env, s->pc++);
                reg = ((modrm >> 3) & 7) | rex_r;
                mod = (modrm >> 6) & 3;
                rm = (modrm & 7) | REX_B(s);
                if (mod != 3) {
                    gen_lea_modrm(env, s, modrm, &reg_addr, &offset_addr);
                    opreg = OR_TMP0;
                } else if (op == OP_XORL && rm == reg) {
                xor_zero:
                    /* xor reg, reg optimisation */
                    gen_op_movl_T0_0();
                    set_cc_op(s, CC_OP_LOGICB + ot);
                    gen_op_mov_reg_T0(ot, reg);
                    gen_op_update1_cc();
                    break;
                } else {
                    opreg = rm;
                }
                gen_op_mov_TN_reg(ot, 1, reg);
                gen_op(s, op, ot, opreg);
                break;
            case 1: /* OP Gv, Ev */
                modrm = cpu_ldub_code(env, s->pc++);
                mod = (modrm >> 6) & 3;
                reg = ((modrm >> 3) & 7) | rex_r;
                rm = (modrm & 7) | REX_B(s);
                if (mod != 3) {
                    gen_lea_modrm(env, s, modrm, &reg_addr, &offset_addr);
                    gen_op_ld_T1_A0(ot + s->mem_index);
                } else if (op == OP_XORL && rm == reg) {
                    goto xor_zero;
                } else {
                    gen_op_mov_TN_reg(ot, 1, rm);
                }
                gen_op(s, op, ot, reg);
                break;
            case 2: /* OP A, Iv */
                val = insn_get(env, s, ot);
                gen_op_movl_T1_im(val);
                gen_op(s, op, ot, OR_EAX);
                break;
            }
        }
        break;

    case 0x82:
        if (CODE64(s))
            goto illegal_op;
    case 0x80: /* GRP1 */
    case 0x81:
    case 0x83:
        {
            int val;

            if ((b & 1) == 0)
                ot = OT_BYTE;
            else
                ot = dflag + OT_WORD;

            modrm = cpu_ldub_code(env, s->pc++);
            mod = (modrm >> 6) & 3;
            rm = (modrm & 7) | REX_B(s);
            op = (modrm >> 3) & 7;

            if (mod != 3) {
                if (b == 0x83)
                    s->rip_offset = 1;
                else
                    s->rip_offset = insn_const_size(ot);
                gen_lea_modrm(env, s, modrm, &reg_addr, &offset_addr);
                opreg = OR_TMP0;
            } else {
                opreg = rm;
            }

            switch(b) {
            default:
            case 0x80:
            case 0x81:
            case 0x82:
                val = insn_get(env, s, ot);
                break;
            case 0x83:
                val = (int8_t)insn_get(env, s, OT_BYTE);
                break;
            }
            gen_op_movl_T1_im(val);
            gen_op(s, op, ot, opreg);
        }
        break;

        /**************************/
        /* inc, dec, and other misc arith */
    case 0x40 ... 0x47: /* inc Gv */
        ot = dflag ? OT_LONG : OT_WORD;
        gen_inc(s, ot, OR_EAX + (b & 7), 1);
        break;
    case 0x48 ... 0x4f: /* dec Gv */
        ot = dflag ? OT_LONG : OT_WORD;
        gen_inc(s, ot, OR_EAX + (b & 7), -1);
        break;
    case 0xf6: /* GRP3 */
    case 0xf7:
        if ((b & 1) == 0)
            ot = OT_BYTE;
        else
            ot = dflag + OT_WORD;

        modrm = cpu_ldub_code(env, s->pc++);
        mod = (modrm >> 6) & 3;
        rm = (modrm & 7) | REX_B(s);
        op = (modrm >> 3) & 7;
        if (mod != 3) {
            if (op == 0)
                s->rip_offset = insn_const_size(ot);
            gen_lea_modrm(env, s, modrm, &reg_addr, &offset_addr);
            gen_op_ld_T0_A0(ot + s->mem_index);
        } else {
            gen_op_mov_TN_reg(ot, 0, rm);
        }

        switch(op) {
        case 0: /* test */
            val = insn_get(env, s, ot);
            gen_op_movl_T1_im(val);
            gen_op_testl_T0_T1_cc();
            set_cc_op(s, CC_OP_LOGICB + ot);
            break;
        case 2: /* not */
            tcg_gen_not_tl(cpu_T[0], cpu_T[0]);
            if (mod != 3) {
                gen_op_st_T0_A0(ot + s->mem_index);
            } else {
                gen_op_mov_reg_T0(ot, rm);
            }
            break;
        case 3: /* neg */
            tcg_gen_neg_tl(cpu_T[0], cpu_T[0]);
            if (mod != 3) {
                gen_op_st_T0_A0(ot + s->mem_index);
            } else {
                gen_op_mov_reg_T0(ot, rm);
            }
            gen_op_update_neg_cc();
            set_cc_op(s, CC_OP_SUBB + ot);
            break;
        case 4: /* mul */
            switch(ot) {
            case OT_BYTE:
                gen_op_mov_TN_reg(OT_BYTE, 1, R_EAX);
                tcg_gen_ext8u_tl(cpu_T[0], cpu_T[0]);
                tcg_gen_ext8u_tl(cpu_T[1], cpu_T[1]);
                /* XXX: use 32 bit mul which could be faster */
                tcg_gen_mul_tl(cpu_T[0], cpu_T[0], cpu_T[1]);
                gen_op_mov_reg_T0(OT_WORD, R_EAX);
                tcg_gen_mov_tl(cpu_cc_dst, cpu_T[0]);
                tcg_gen_andi_tl(cpu_cc_src, cpu_T[0], 0xff00);
                set_cc_op(s, CC_OP_MULB);
                break;
            case OT_WORD:
                gen_op_mov_TN_reg(OT_WORD, 1, R_EAX);
                tcg_gen_ext16u_tl(cpu_T[0], cpu_T[0]);
                tcg_gen_ext16u_tl(cpu_T[1], cpu_T[1]);
                /* XXX: use 32 bit mul which could be faster */
                tcg_gen_mul_tl(cpu_T[0], cpu_T[0], cpu_T[1]);
                gen_op_mov_reg_T0(OT_WORD, R_EAX);
                tcg_gen_mov_tl(cpu_cc_dst, cpu_T[0]);
                tcg_gen_shri_tl(cpu_T[0], cpu_T[0], 16);
                gen_op_mov_reg_T0(OT_WORD, R_EDX);
                tcg_gen_mov_tl(cpu_cc_src, cpu_T[0]);
                set_cc_op(s, CC_OP_MULW);
                break;
            default:
            case OT_LONG:
#ifdef TARGET_X86_64
                gen_op_mov_TN_reg(OT_LONG, 1, R_EAX);
                tcg_gen_ext32u_tl(cpu_T[0], cpu_T[0]);
                tcg_gen_ext32u_tl(cpu_T[1], cpu_T[1]);
                tcg_gen_mul_tl(cpu_T[0], cpu_T[0], cpu_T[1]);
                gen_op_mov_reg_T0(OT_LONG, R_EAX);
                tcg_gen_mov_tl(cpu_cc_dst, cpu_T[0]);
                tcg_gen_shri_tl(cpu_T[0], cpu_T[0], 32);
                gen_op_mov_reg_T0(OT_LONG, R_EDX);
                tcg_gen_mov_tl(cpu_cc_src, cpu_T[0]);
#else
                {
                    TCGv_i64 t0, t1;
                    t0 = tcg_temp_new_i64();
                    t1 = tcg_temp_new_i64();
                    gen_op_mov_TN_reg(OT_LONG, 1, R_EAX);
                    tcg_gen_extu_i32_i64(t0, cpu_T[0]);
                    tcg_gen_extu_i32_i64(t1, cpu_T[1]);
                    tcg_gen_mul_i64(t0, t0, t1);
                    tcg_gen_trunc_i64_i32(cpu_T[0], t0);
                    gen_op_mov_reg_T0(OT_LONG, R_EAX);
                    tcg_gen_mov_tl(cpu_cc_dst, cpu_T[0]);
                    tcg_gen_shri_i64(t0, t0, 32);
                    tcg_gen_trunc_i64_i32(cpu_T[0], t0);
                    gen_op_mov_reg_T0(OT_LONG, R_EDX);
                    tcg_gen_mov_tl(cpu_cc_src, cpu_T[0]);
                }
#endif
                set_cc_op(s, CC_OP_MULL);
                break;
#ifdef TARGET_X86_64
            case OT_QUAD:
                gen_helper_mulq_EAX_T0(cpu_env, cpu_T[0]);
                set_cc_op(s, CC_OP_MULQ);
                break;
#endif
            }
            break;
        case 5: /* imul */
            switch(ot) {
            case OT_BYTE:
                gen_op_mov_TN_reg(OT_BYTE, 1, R_EAX);
                tcg_gen_ext8s_tl(cpu_T[0], cpu_T[0]);
                tcg_gen_ext8s_tl(cpu_T[1], cpu_T[1]);
                /* XXX: use 32 bit mul which could be faster */
                tcg_gen_mul_tl(cpu_T[0], cpu_T[0], cpu_T[1]);
                gen_op_mov_reg_T0(OT_WORD, R_EAX);
                tcg_gen_mov_tl(cpu_cc_dst, cpu_T[0]);
                tcg_gen_ext8s_tl(cpu_tmp0, cpu_T[0]);
                tcg_gen_sub_tl(cpu_cc_src, cpu_T[0], cpu_tmp0);
                set_cc_op(s, CC_OP_MULB);
                break;
            case OT_WORD:
                gen_op_mov_TN_reg(OT_WORD, 1, R_EAX);
                tcg_gen_ext16s_tl(cpu_T[0], cpu_T[0]);
                tcg_gen_ext16s_tl(cpu_T[1], cpu_T[1]);
                /* XXX: use 32 bit mul which could be faster */
                tcg_gen_mul_tl(cpu_T[0], cpu_T[0], cpu_T[1]);
                gen_op_mov_reg_T0(OT_WORD, R_EAX);
                tcg_gen_mov_tl(cpu_cc_dst, cpu_T[0]);
                tcg_gen_ext16s_tl(cpu_tmp0, cpu_T[0]);
                tcg_gen_sub_tl(cpu_cc_src, cpu_T[0], cpu_tmp0);
                tcg_gen_shri_tl(cpu_T[0], cpu_T[0], 16);
                gen_op_mov_reg_T0(OT_WORD, R_EDX);
                set_cc_op(s, CC_OP_MULW);
                break;
            default:
            case OT_LONG:
#ifdef TARGET_X86_64
                gen_op_mov_TN_reg(OT_LONG, 1, R_EAX);
                tcg_gen_ext32s_tl(cpu_T[0], cpu_T[0]);
                tcg_gen_ext32s_tl(cpu_T[1], cpu_T[1]);
                tcg_gen_mul_tl(cpu_T[0], cpu_T[0], cpu_T[1]);
                gen_op_mov_reg_T0(OT_LONG, R_EAX);
                tcg_gen_mov_tl(cpu_cc_dst, cpu_T[0]);
                tcg_gen_ext32s_tl(cpu_tmp0, cpu_T[0]);
                tcg_gen_sub_tl(cpu_cc_src, cpu_T[0], cpu_tmp0);
                tcg_gen_shri_tl(cpu_T[0], cpu_T[0], 32);
                gen_op_mov_reg_T0(OT_LONG, R_EDX);
#else
                {
                    TCGv_i64 t0, t1;
                    t0 = tcg_temp_new_i64();
                    t1 = tcg_temp_new_i64();
                    gen_op_mov_TN_reg(OT_LONG, 1, R_EAX);
                    tcg_gen_ext_i32_i64(t0, cpu_T[0]);
                    tcg_gen_ext_i32_i64(t1, cpu_T[1]);
                    tcg_gen_mul_i64(t0, t0, t1);
                    tcg_gen_trunc_i64_i32(cpu_T[0], t0);
                    gen_op_mov_reg_T0(OT_LONG, R_EAX);
                    tcg_gen_mov_tl(cpu_cc_dst, cpu_T[0]);
                    tcg_gen_sari_tl(cpu_tmp0, cpu_T[0], 31);
                    tcg_gen_shri_i64(t0, t0, 32);
                    tcg_gen_trunc_i64_i32(cpu_T[0], t0);
                    gen_op_mov_reg_T0(OT_LONG, R_EDX);
                    tcg_gen_sub_tl(cpu_cc_src, cpu_T[0], cpu_tmp0);
                }
#endif
                set_cc_op(s, CC_OP_MULL);
                break;
#ifdef TARGET_X86_64
            case OT_QUAD:
                gen_helper_imulq_EAX_T0(cpu_env, cpu_T[0]);
                set_cc_op(s, CC_OP_MULQ);
                break;
#endif
            }
            break;
        case 6: /* div */
            switch(ot) {
            case OT_BYTE:
                gen_jmp_im(pc_start - s->cs_base);
                gen_helper_divb_AL(cpu_env, cpu_T[0]);
                break;
            case OT_WORD:
                gen_jmp_im(pc_start - s->cs_base);
                gen_helper_divw_AX(cpu_env, cpu_T[0]);
                break;
            default:
            case OT_LONG:
                gen_jmp_im(pc_start - s->cs_base);
                gen_helper_divl_EAX(cpu_env, cpu_T[0]);
                break;
#ifdef TARGET_X86_64
            case OT_QUAD:
                gen_jmp_im(pc_start - s->cs_base);
                gen_helper_divq_EAX(cpu_env, cpu_T[0]);
                break;
#endif
            }
            break;
        case 7: /* idiv */
            switch(ot) {
            case OT_BYTE:
                gen_jmp_im(pc_start - s->cs_base);
                gen_helper_idivb_AL(cpu_env, cpu_T[0]);
                break;
            case OT_WORD:
                gen_jmp_im(pc_start - s->cs_base);
                gen_helper_idivw_AX(cpu_env, cpu_T[0]);
                break;
            default:
            case OT_LONG:
                gen_jmp_im(pc_start - s->cs_base);
                gen_helper_idivl_EAX(cpu_env, cpu_T[0]);
                break;
#ifdef TARGET_X86_64
            case OT_QUAD:
                gen_jmp_im(pc_start - s->cs_base);
                gen_helper_idivq_EAX(cpu_env, cpu_T[0]);
                break;
#endif
            }
            break;
        default:
            goto illegal_op;
        }
        break;

    case 0xfe: /* GRP4 */
    case 0xff: /* GRP5 */
        if ((b & 1) == 0)
            ot = OT_BYTE;
        else
            ot = dflag + OT_WORD;

        modrm = cpu_ldub_code(env, s->pc++);
        mod = (modrm >> 6) & 3;
        rm = (modrm & 7) | REX_B(s);
        op = (modrm >> 3) & 7;
        if (op >= 2 && b == 0xfe) {
            goto illegal_op;
        }
        if (CODE64(s)) {
            if (op == 2 || op == 4) {
                /* operand size for jumps is 64 bit */
                ot = OT_QUAD;
            } else if (op == 3 || op == 5) {
                ot = dflag ? OT_LONG + (rex_w == 1) : OT_WORD;
            } else if (op == 6) {
                /* default push size is 64 bit */
                ot = dflag ? OT_QUAD : OT_WORD;
            }
        }
        if (mod != 3) {
            gen_lea_modrm(env, s, modrm, &reg_addr, &offset_addr);
            if (op >= 2 && op != 3 && op != 5)
                gen_op_ld_T0_A0(ot + s->mem_index);
        } else {
            gen_op_mov_TN_reg(ot, 0, rm);
        }

        switch(op) {
        case 0: /* inc Ev */
            if (mod != 3)
                opreg = OR_TMP0;
            else
                opreg = rm;
            gen_inc(s, ot, opreg, 1);
            break;
        case 1: /* dec Ev */
            if (mod != 3)
                opreg = OR_TMP0;
            else
                opreg = rm;
            gen_inc(s, ot, opreg, -1);
            break;
        case 2: /* call Ev */
            /* XXX: optimize if memory (no 'and' is necessary) */
            if (s->dflag == 0)
                gen_op_andl_T0_ffff();
            next_eip = s->pc - s->cs_base;
            gen_movtl_T1_im(next_eip);
            gen_push_T1(s);
            gen_op_jmp_T0();
            gen_eob(s);
            break;
        case 3: /* lcall Ev */
            gen_op_ld_T1_A0(ot + s->mem_index);
            gen_add_A0_im(s, 1 << (ot - OT_WORD + 1));
            gen_op_ldu_T0_A0(OT_WORD + s->mem_index);
        do_lcall:
            if (s->pe && !s->vm86) {
                gen_update_cc_op(s);
                gen_jmp_im(pc_start - s->cs_base);
                tcg_gen_trunc_tl_i32(cpu_tmp2_i32, cpu_T[0]);
                gen_helper_lcall_protected(cpu_env, cpu_tmp2_i32, cpu_T[1],
                                           tcg_const_i32(dflag),
                                           tcg_const_i32(s->pc - pc_start));
            } else {
                tcg_gen_trunc_tl_i32(cpu_tmp2_i32, cpu_T[0]);
                gen_helper_lcall_real(cpu_env, cpu_tmp2_i32, cpu_T[1],
                                      tcg_const_i32(dflag),
                                      tcg_const_i32(s->pc - s->cs_base));
            }
            gen_eob(s);
            break;
        case 4: /* jmp Ev */
            if (s->dflag == 0)
                gen_op_andl_T0_ffff();
            gen_op_jmp_T0();
            gen_eob(s);
            break;
        case 5: /* ljmp Ev */
            gen_op_ld_T1_A0(ot + s->mem_index);
            gen_add_A0_im(s, 1 << (ot - OT_WORD + 1));
            gen_op_ldu_T0_A0(OT_WORD + s->mem_index);
        do_ljmp:
            if (s->pe && !s->vm86) {
                gen_update_cc_op(s);
                gen_jmp_im(pc_start - s->cs_base);
                tcg_gen_trunc_tl_i32(cpu_tmp2_i32, cpu_T[0]);
                gen_helper_ljmp_protected(cpu_env, cpu_tmp2_i32, cpu_T[1],
                                          tcg_const_i32(s->pc - pc_start));
            } else {
                gen_op_movl_seg_T0_vm(R_CS);
                gen_op_movl_T0_T1();
                gen_op_jmp_T0();
            }
            gen_eob(s);
            break;
        case 6: /* push Ev */
            gen_push_T0(s);
            break;
        default:
            goto illegal_op;
        }
        break;

    case 0x84: /* test Ev, Gv */
    case 0x85:
        if ((b & 1) == 0)
            ot = OT_BYTE;
        else
            ot = dflag + OT_WORD;

        modrm = cpu_ldub_code(env, s->pc++);
        reg = ((modrm >> 3) & 7) | rex_r;

        gen_ldst_modrm(env, s, modrm, ot, OR_TMP0, 0);
        gen_op_mov_TN_reg(ot, 1, reg);
        gen_op_testl_T0_T1_cc();
        set_cc_op(s, CC_OP_LOGICB + ot);
        break;

    case 0xa8: /* test eAX, Iv */
    case 0xa9:
        if ((b & 1) == 0)
            ot = OT_BYTE;
        else
            ot = dflag + OT_WORD;
        val = insn_get(env, s, ot);

        gen_op_mov_TN_reg(ot, 0, OR_EAX);
        gen_op_movl_T1_im(val);
        gen_op_testl_T0_T1_cc();
        set_cc_op(s, CC_OP_LOGICB + ot);
        break;

    case 0x98: /* CWDE/CBW */
#ifdef TARGET_X86_64
        if (dflag == 2) {
            gen_op_mov_TN_reg(OT_LONG, 0, R_EAX);
            tcg_gen_ext32s_tl(cpu_T[0], cpu_T[0]);
            gen_op_mov_reg_T0(OT_QUAD, R_EAX);
        } else
#endif
        if (dflag == 1) {
            gen_op_mov_TN_reg(OT_WORD, 0, R_EAX);
            tcg_gen_ext16s_tl(cpu_T[0], cpu_T[0]);
            gen_op_mov_reg_T0(OT_LONG, R_EAX);
        } else {
            gen_op_mov_TN_reg(OT_BYTE, 0, R_EAX);
            tcg_gen_ext8s_tl(cpu_T[0], cpu_T[0]);
            gen_op_mov_reg_T0(OT_WORD, R_EAX);
        }
        break;
    case 0x99: /* CDQ/CWD */
#ifdef TARGET_X86_64
        if (dflag == 2) {
            gen_op_mov_TN_reg(OT_QUAD, 0, R_EAX);
            tcg_gen_sari_tl(cpu_T[0], cpu_T[0], 63);
            gen_op_mov_reg_T0(OT_QUAD, R_EDX);
        } else
#endif
        if (dflag == 1) {
            gen_op_mov_TN_reg(OT_LONG, 0, R_EAX);
            tcg_gen_ext32s_tl(cpu_T[0], cpu_T[0]);
            tcg_gen_sari_tl(cpu_T[0], cpu_T[0], 31);
            gen_op_mov_reg_T0(OT_LONG, R_EDX);
        } else {
            gen_op_mov_TN_reg(OT_WORD, 0, R_EAX);
            tcg_gen_ext16s_tl(cpu_T[0], cpu_T[0]);
            tcg_gen_sari_tl(cpu_T[0], cpu_T[0], 15);
            gen_op_mov_reg_T0(OT_WORD, R_EDX);
        }
        break;
    case 0x1af: /* imul Gv, Ev */
    case 0x69: /* imul Gv, Ev, I */
    case 0x6b:
        ot = dflag + OT_WORD;
        modrm = cpu_ldub_code(env, s->pc++);
        reg = ((modrm >> 3) & 7) | rex_r;
        if (b == 0x69)
            s->rip_offset = insn_const_size(ot);
        else if (b == 0x6b)
            s->rip_offset = 1;
        gen_ldst_modrm(env, s, modrm, ot, OR_TMP0, 0);
        if (b == 0x69) {
            val = insn_get(env, s, ot);
            gen_op_movl_T1_im(val);
        } else if (b == 0x6b) {
            val = (int8_t)insn_get(env, s, OT_BYTE);
            gen_op_movl_T1_im(val);
        } else {
            gen_op_mov_TN_reg(ot, 1, reg);
        }

#ifdef TARGET_X86_64
        if (ot == OT_QUAD) {
            gen_helper_imulq_T0_T1(cpu_T[0], cpu_env, cpu_T[0], cpu_T[1]);
        } else
#endif
        if (ot == OT_LONG) {
#ifdef TARGET_X86_64
                tcg_gen_ext32s_tl(cpu_T[0], cpu_T[0]);
                tcg_gen_ext32s_tl(cpu_T[1], cpu_T[1]);
                tcg_gen_mul_tl(cpu_T[0], cpu_T[0], cpu_T[1]);
                tcg_gen_mov_tl(cpu_cc_dst, cpu_T[0]);
                tcg_gen_ext32s_tl(cpu_tmp0, cpu_T[0]);
                tcg_gen_sub_tl(cpu_cc_src, cpu_T[0], cpu_tmp0);
#else
                {
                    TCGv_i64 t0, t1;
                    t0 = tcg_temp_new_i64();
                    t1 = tcg_temp_new_i64();
                    tcg_gen_ext_i32_i64(t0, cpu_T[0]);
                    tcg_gen_ext_i32_i64(t1, cpu_T[1]);
                    tcg_gen_mul_i64(t0, t0, t1);
                    tcg_gen_trunc_i64_i32(cpu_T[0], t0);
                    tcg_gen_mov_tl(cpu_cc_dst, cpu_T[0]);
                    tcg_gen_sari_tl(cpu_tmp0, cpu_T[0], 31);
                    tcg_gen_shri_i64(t0, t0, 32);
                    tcg_gen_trunc_i64_i32(cpu_T[1], t0);
                    tcg_gen_sub_tl(cpu_cc_src, cpu_T[1], cpu_tmp0);
                }
#endif
        } else {
            tcg_gen_ext16s_tl(cpu_T[0], cpu_T[0]);
            tcg_gen_ext16s_tl(cpu_T[1], cpu_T[1]);
            /* XXX: use 32 bit mul which could be faster */
            tcg_gen_mul_tl(cpu_T[0], cpu_T[0], cpu_T[1]);
            tcg_gen_mov_tl(cpu_cc_dst, cpu_T[0]);
            tcg_gen_ext16s_tl(cpu_tmp0, cpu_T[0]);
            tcg_gen_sub_tl(cpu_cc_src, cpu_T[0], cpu_tmp0);
        }
        gen_op_mov_reg_T0(ot, reg);
        set_cc_op(s, CC_OP_MULB + ot);
        break;
    case 0x1c0:
    case 0x1c1: /* xadd Ev, Gv */
        if ((b & 1) == 0)
            ot = OT_BYTE;
        else
            ot = dflag + OT_WORD;
        modrm = cpu_ldub_code(env, s->pc++);
        reg = ((modrm >> 3) & 7) | rex_r;
        mod = (modrm >> 6) & 3;
        if (mod == 3) {
            rm = (modrm & 7) | REX_B(s);
            gen_op_mov_TN_reg(ot, 0, reg);
            gen_op_mov_TN_reg(ot, 1, rm);
            gen_op_addl_T0_T1();
            gen_op_mov_reg_T1(ot, reg);
            gen_op_mov_reg_T0(ot, rm);
        } else {
            gen_lea_modrm(env, s, modrm, &reg_addr, &offset_addr);
            gen_op_mov_TN_reg(ot, 0, reg);
            gen_op_ld_T1_A0(ot + s->mem_index);
            gen_op_addl_T0_T1();
            gen_op_st_T0_A0(ot + s->mem_index);
            gen_op_mov_reg_T1(ot, reg);
        }
        gen_op_update2_cc();
        set_cc_op(s, CC_OP_ADDB + ot);
        break;
    case 0x1b0:
    case 0x1b1: /* cmpxchg Ev, Gv */
        {
            int label1, label2;
            TCGv t0, t1, t2, a0;

            if ((b & 1) == 0)
                ot = OT_BYTE;
            else
                ot = dflag + OT_WORD;
            modrm = cpu_ldub_code(env, s->pc++);
            reg = ((modrm >> 3) & 7) | rex_r;
            mod = (modrm >> 6) & 3;
            t0 = tcg_temp_local_new();
            t1 = tcg_temp_local_new();
            t2 = tcg_temp_local_new();
            a0 = tcg_temp_local_new();
            gen_op_mov_v_reg(ot, t1, reg);
            if (mod == 3) {
                rm = (modrm & 7) | REX_B(s);
                gen_op_mov_v_reg(ot, t0, rm);
            } else {
                gen_lea_modrm(env, s, modrm, &reg_addr, &offset_addr);
                tcg_gen_mov_tl(a0, cpu_A0);
                gen_op_ld_v(ot + s->mem_index, t0, a0);
                rm = 0; /* avoid warning */
            }
            label1 = gen_new_label();
            tcg_gen_mov_tl(t2, cpu_regs[R_EAX]);
            gen_extu(ot, t0);
            gen_extu(ot, t2);
            tcg_gen_brcond_tl(TCG_COND_EQ, t2, t0, label1);
            label2 = gen_new_label();
            if (mod == 3) {
                gen_op_mov_reg_v(ot, R_EAX, t0);
                tcg_gen_br(label2);
                gen_set_label(label1);
                gen_op_mov_reg_v(ot, rm, t1);
            } else {
                /* perform no-op store cycle like physical cpu; must be
                   before changing accumulator to ensure idempotency if
                   the store faults and the instruction is restarted */
                gen_op_st_v(ot + s->mem_index, t0, a0);
                gen_op_mov_reg_v(ot, R_EAX, t0);
                tcg_gen_br(label2);
                gen_set_label(label1);
                gen_op_st_v(ot + s->mem_index, t1, a0);
            }
            gen_set_label(label2);
            tcg_gen_mov_tl(cpu_cc_src, t0);
            tcg_gen_mov_tl(cpu_cc_srcT, t2);
            tcg_gen_sub_tl(cpu_cc_dst, t2, t0);
            set_cc_op(s, CC_OP_SUBB + ot);
            tcg_temp_free(t0);
            tcg_temp_free(t1);
            tcg_temp_free(t2);
            tcg_temp_free(a0);
        }
        break;
    case 0x1c7: /* cmpxchg8b */
        modrm = cpu_ldub_code(env, s->pc++);
        mod = (modrm >> 6) & 3;
        if ((mod == 3) || ((modrm & 0x38) != 0x8))
            goto illegal_op;
#ifdef TARGET_X86_64
        if (dflag == 2) {
            if (!(s->cpuid_ext_features & CPUID_EXT_CX16))
                goto illegal_op;
            gen_jmp_im(pc_start - s->cs_base);
            gen_update_cc_op(s);
            gen_lea_modrm(env, s, modrm, &reg_addr, &offset_addr);
            gen_helper_cmpxchg16b(cpu_env, cpu_A0);
        } else
#endif        
        {
            if (!(s->cpuid_features & CPUID_CX8))
                goto illegal_op;
            gen_jmp_im(pc_start - s->cs_base);
            gen_update_cc_op(s);
            gen_lea_modrm(env, s, modrm, &reg_addr, &offset_addr);
            gen_helper_cmpxchg8b(cpu_env, cpu_A0);
        }
        set_cc_op(s, CC_OP_EFLAGS);
        break;

        /**************************/
        /* push/pop */
    case 0x50 ... 0x57: /* push */
        gen_op_mov_TN_reg(OT_LONG, 0, (b & 7) | REX_B(s));
        gen_push_T0(s);
        break;
    case 0x58 ... 0x5f: /* pop */
        if (CODE64(s)) {
            ot = dflag ? OT_QUAD : OT_WORD;
        } else {
            ot = dflag + OT_WORD;
        }
        gen_pop_T0(s);
        /* NOTE: order is important for pop %sp */
        gen_pop_update(s);
        gen_op_mov_reg_T0(ot, (b & 7) | REX_B(s));
        break;
    case 0x60: /* pusha */
        if (CODE64(s))
            goto illegal_op;
        gen_pusha(s);
        break;
    case 0x61: /* popa */
        if (CODE64(s))
            goto illegal_op;
        gen_popa(s);
        break;
    case 0x68: /* push Iv */
    case 0x6a:
        if (CODE64(s)) {
            ot = dflag ? OT_QUAD : OT_WORD;
        } else {
            ot = dflag + OT_WORD;
        }
        if (b == 0x68)
            val = insn_get(env, s, ot);
        else
            val = (int8_t)insn_get(env, s, OT_BYTE);
        gen_op_movl_T0_im(val);
        gen_push_T0(s);
        break;
    case 0x8f: /* pop Ev */
        if (CODE64(s)) {
            ot = dflag ? OT_QUAD : OT_WORD;
        } else {
            ot = dflag + OT_WORD;
        }
        modrm = cpu_ldub_code(env, s->pc++);
        mod = (modrm >> 6) & 3;
        gen_pop_T0(s);
        if (mod == 3) {
            /* NOTE: order is important for pop %sp */
            gen_pop_update(s);
            rm = (modrm & 7) | REX_B(s);
            gen_op_mov_reg_T0(ot, rm);
        } else {
            /* NOTE: order is important too for MMU exceptions */
            s->popl_esp_hack = 1 << ot;
            gen_ldst_modrm(env, s, modrm, ot, OR_TMP0, 1);
            s->popl_esp_hack = 0;
            gen_pop_update(s);
        }
        break;
    case 0xc8: /* enter */
        {
            int level;
            val = cpu_lduw_code(env, s->pc);
            s->pc += 2;
            level = cpu_ldub_code(env, s->pc++);
            gen_enter(s, val, level);
        }
        break;
    case 0xc9: /* leave */
        /* XXX: exception not precise (ESP is updated before potential exception) */
        if (CODE64(s)) {
            gen_op_mov_TN_reg(OT_QUAD, 0, R_EBP);
            gen_op_mov_reg_T0(OT_QUAD, R_ESP);
        } else if (s->ss32) {
            gen_op_mov_TN_reg(OT_LONG, 0, R_EBP);
            gen_op_mov_reg_T0(OT_LONG, R_ESP);
        } else {
            gen_op_mov_TN_reg(OT_WORD, 0, R_EBP);
            gen_op_mov_reg_T0(OT_WORD, R_ESP);
        }
        gen_pop_T0(s);
        if (CODE64(s)) {
            ot = dflag ? OT_QUAD : OT_WORD;
        } else {
            ot = dflag + OT_WORD;
        }
        gen_op_mov_reg_T0(ot, R_EBP);
        gen_pop_update(s);
        break;
    case 0x06: /* push es */
    case 0x0e: /* push cs */
    case 0x16: /* push ss */
    case 0x1e: /* push ds */
        if (CODE64(s))
            goto illegal_op;
        gen_op_movl_T0_seg(b >> 3);
        gen_push_T0(s);
        break;
    case 0x1a0: /* push fs */
    case 0x1a8: /* push gs */
        gen_op_movl_T0_seg((b >> 3) & 7);
        gen_push_T0(s);
        break;
    case 0x07: /* pop es */
    case 0x17: /* pop ss */
    case 0x1f: /* pop ds */
        if (CODE64(s))
            goto illegal_op;
        reg = b >> 3;
        gen_pop_T0(s);
        gen_movl_seg_T0(s, reg, pc_start - s->cs_base);
        gen_pop_update(s);
        if (reg == R_SS) {
            /* if reg == SS, inhibit interrupts/trace. */
            /* If several instructions disable interrupts, only the
               _first_ does it */
            if (!(s->tb->flags & HF_INHIBIT_IRQ_MASK))
                gen_helper_set_inhibit_irq(cpu_env);
            s->tf = 0;
        }
        if (s->is_jmp) {
            gen_jmp_im(s->pc - s->cs_base);
            gen_eob(s);
        }
        break;
    case 0x1a1: /* pop fs */
    case 0x1a9: /* pop gs */
        gen_pop_T0(s);
        gen_movl_seg_T0(s, (b >> 3) & 7, pc_start - s->cs_base);
        gen_pop_update(s);
        if (s->is_jmp) {
            gen_jmp_im(s->pc - s->cs_base);
            gen_eob(s);
        }
        break;

        /**************************/
        /* mov */
    case 0x88:
    case 0x89: /* mov Gv, Ev */
        if ((b & 1) == 0)
            ot = OT_BYTE;
        else
            ot = dflag + OT_WORD;
        modrm = cpu_ldub_code(env, s->pc++);
        reg = ((modrm >> 3) & 7) | rex_r;

        /* generate a generic store */
        gen_ldst_modrm(env, s, modrm, ot, reg, 1);
        break;
    case 0xc6:
    case 0xc7: /* mov Ev, Iv */
        if ((b & 1) == 0)
            ot = OT_BYTE;
        else
            ot = dflag + OT_WORD;
        modrm = cpu_ldub_code(env, s->pc++);
        mod = (modrm >> 6) & 3;
        if (mod != 3) {
            s->rip_offset = insn_const_size(ot);
            gen_lea_modrm(env, s, modrm, &reg_addr, &offset_addr);
        }
        val = insn_get(env, s, ot);
        gen_op_movl_T0_im(val);
        if (mod != 3)
            gen_op_st_T0_A0(ot + s->mem_index);
        else
            gen_op_mov_reg_T0(ot, (modrm & 7) | REX_B(s));
        break;
    case 0x8a:
    case 0x8b: /* mov Ev, Gv */
        if ((b & 1) == 0)
            ot = OT_BYTE;
        else
            ot = OT_WORD + dflag;
        modrm = cpu_ldub_code(env, s->pc++);
        reg = ((modrm >> 3) & 7) | rex_r;

        gen_ldst_modrm(env, s, modrm, ot, OR_TMP0, 0);
        gen_op_mov_reg_T0(ot, reg);
        break;
    case 0x8e: /* mov seg, Gv */
        modrm = cpu_ldub_code(env, s->pc++);
        reg = (modrm >> 3) & 7;
        if (reg >= 6 || reg == R_CS)
            goto illegal_op;
        gen_ldst_modrm(env, s, modrm, OT_WORD, OR_TMP0, 0);
        gen_movl_seg_T0(s, reg, pc_start - s->cs_base);
        if (reg == R_SS) {
            /* if reg == SS, inhibit interrupts/trace */
            /* If several instructions disable interrupts, only the
               _first_ does it */
            if (!(s->tb->flags & HF_INHIBIT_IRQ_MASK))
                gen_helper_set_inhibit_irq(cpu_env);
            s->tf = 0;
        }
        if (s->is_jmp) {
            gen_jmp_im(s->pc - s->cs_base);
            gen_eob(s);
        }
        break;
    case 0x8c: /* mov Gv, seg */
        modrm = cpu_ldub_code(env, s->pc++);
        reg = (modrm >> 3) & 7;
        mod = (modrm >> 6) & 3;
        if (reg >= 6)
            goto illegal_op;
        gen_op_movl_T0_seg(reg);
        if (mod == 3)
            ot = OT_WORD + dflag;
        else
            ot = OT_WORD;
        gen_ldst_modrm(env, s, modrm, ot, OR_TMP0, 1);
        break;

    case 0x1b6: /* movzbS Gv, Eb */
    case 0x1b7: /* movzwS Gv, Eb */
    case 0x1be: /* movsbS Gv, Eb */
    case 0x1bf: /* movswS Gv, Eb */
        {
            int d_ot;
            /* d_ot is the size of destination */
            d_ot = dflag + OT_WORD;
            /* ot is the size of source */
            ot = (b & 1) + OT_BYTE;
            modrm = cpu_ldub_code(env, s->pc++);
            reg = ((modrm >> 3) & 7) | rex_r;
            mod = (modrm >> 6) & 3;
            rm = (modrm & 7) | REX_B(s);

            if (mod == 3) {
                gen_op_mov_TN_reg(ot, 0, rm);
                switch(ot | (b & 8)) {
                case OT_BYTE:
                    tcg_gen_ext8u_tl(cpu_T[0], cpu_T[0]);
                    break;
                case OT_BYTE | 8:
                    tcg_gen_ext8s_tl(cpu_T[0], cpu_T[0]);
                    break;
                case OT_WORD:
                    tcg_gen_ext16u_tl(cpu_T[0], cpu_T[0]);
                    break;
                default:
                case OT_WORD | 8:
                    tcg_gen_ext16s_tl(cpu_T[0], cpu_T[0]);
                    break;
                }
                gen_op_mov_reg_T0(d_ot, reg);
            } else {
                gen_lea_modrm(env, s, modrm, &reg_addr, &offset_addr);
                if (b & 8) {
                    gen_op_lds_T0_A0(ot + s->mem_index);
                } else {
                    gen_op_ldu_T0_A0(ot + s->mem_index);
                }
                gen_op_mov_reg_T0(d_ot, reg);
            }
        }
        break;

    case 0x8d: /* lea */
        ot = dflag + OT_WORD;
        modrm = cpu_ldub_code(env, s->pc++);
        mod = (modrm >> 6) & 3;
        if (mod == 3)
            goto illegal_op;
        reg = ((modrm >> 3) & 7) | rex_r;
        /* we must ensure that no segment is added */
        s->override = -1;
        val = s->addseg;
        s->addseg = 0;
        gen_lea_modrm(env, s, modrm, &reg_addr, &offset_addr);
        s->addseg = val;
        gen_op_mov_reg_A0(ot - OT_WORD, reg);
        break;

    case 0xa0: /* mov EAX, Ov */
    case 0xa1:
    case 0xa2: /* mov Ov, EAX */
    case 0xa3:
        {
            target_ulong offset_addr;

            if ((b & 1) == 0)
                ot = OT_BYTE;
            else
                ot = dflag + OT_WORD;
#ifdef TARGET_X86_64
            if (s->aflag == 2) {
                offset_addr = cpu_ldq_code(env, s->pc);
                s->pc += 8;
                gen_op_movq_A0_im(offset_addr);
            } else
#endif
            {
                if (s->aflag) {
                    offset_addr = insn_get(env, s, OT_LONG);
                } else {
                    offset_addr = insn_get(env, s, OT_WORD);
                }
                gen_op_movl_A0_im(offset_addr);
            }
            gen_add_A0_ds_seg(s);
            if ((b & 2) == 0) {
                gen_op_ld_T0_A0(ot + s->mem_index);
                gen_op_mov_reg_T0(ot, R_EAX);
            } else {
                gen_op_mov_TN_reg(ot, 0, R_EAX);
                gen_op_st_T0_A0(ot + s->mem_index);
            }
        }
        break;
    case 0xd7: /* xlat */
#ifdef TARGET_X86_64
        if (s->aflag == 2) {
            gen_op_movq_A0_reg(R_EBX);
            gen_op_mov_TN_reg(OT_QUAD, 0, R_EAX);
            tcg_gen_andi_tl(cpu_T[0], cpu_T[0], 0xff);
            tcg_gen_add_tl(cpu_A0, cpu_A0, cpu_T[0]);
        } else
#endif
        {
            gen_op_movl_A0_reg(R_EBX);
            gen_op_mov_TN_reg(OT_LONG, 0, R_EAX);
            tcg_gen_andi_tl(cpu_T[0], cpu_T[0], 0xff);
            tcg_gen_add_tl(cpu_A0, cpu_A0, cpu_T[0]);
            if (s->aflag == 0)
                gen_op_andl_A0_ffff();
            else
                tcg_gen_andi_tl(cpu_A0, cpu_A0, 0xffffffff);
        }
        gen_add_A0_ds_seg(s);
        gen_op_ldu_T0_A0(OT_BYTE + s->mem_index);
        gen_op_mov_reg_T0(OT_BYTE, R_EAX);
        break;
    case 0xb0 ... 0xb7: /* mov R, Ib */
        val = insn_get(env, s, OT_BYTE);
        gen_op_movl_T0_im(val);
        gen_op_mov_reg_T0(OT_BYTE, (b & 7) | REX_B(s));
        break;
    case 0xb8 ... 0xbf: /* mov R, Iv */
#ifdef TARGET_X86_64
        if (dflag == 2) {
            uint64_t tmp;
            /* 64 bit case */
            tmp = cpu_ldq_code(env, s->pc);
            s->pc += 8;
            reg = (b & 7) | REX_B(s);
            gen_movtl_T0_im(tmp);
            gen_op_mov_reg_T0(OT_QUAD, reg);
        } else
#endif
        {
            ot = dflag ? OT_LONG : OT_WORD;
            val = insn_get(env, s, ot);
            reg = (b & 7) | REX_B(s);
            gen_op_movl_T0_im(val);
            gen_op_mov_reg_T0(ot, reg);
        }
        break;

    case 0x91 ... 0x97: /* xchg R, EAX */
    do_xchg_reg_eax:
        ot = dflag + OT_WORD;
        reg = (b & 7) | REX_B(s);
        rm = R_EAX;
        goto do_xchg_reg;
    case 0x86:
    case 0x87: /* xchg Ev, Gv */
        if ((b & 1) == 0)
            ot = OT_BYTE;
        else
            ot = dflag + OT_WORD;
        modrm = cpu_ldub_code(env, s->pc++);
        reg = ((modrm >> 3) & 7) | rex_r;
        mod = (modrm >> 6) & 3;
        if (mod == 3) {
            rm = (modrm & 7) | REX_B(s);
        do_xchg_reg:
            gen_op_mov_TN_reg(ot, 0, reg);
            gen_op_mov_TN_reg(ot, 1, rm);
            gen_op_mov_reg_T0(ot, rm);
            gen_op_mov_reg_T1(ot, reg);
        } else {
            gen_lea_modrm(env, s, modrm, &reg_addr, &offset_addr);
            gen_op_mov_TN_reg(ot, 0, reg);
            /* for xchg, lock is implicit */
            if (!(prefixes & PREFIX_LOCK))
                gen_helper_lock();
            gen_op_ld_T1_A0(ot + s->mem_index);
            gen_op_st_T0_A0(ot + s->mem_index);
            if (!(prefixes & PREFIX_LOCK))
                gen_helper_unlock();
            gen_op_mov_reg_T1(ot, reg);
        }
        break;
    case 0xc4: /* les Gv */
        if (CODE64(s))
            goto illegal_op;
        op = R_ES;
        goto do_lxx;
    case 0xc5: /* lds Gv */
        if (CODE64(s))
            goto illegal_op;
        op = R_DS;
        goto do_lxx;
    case 0x1b2: /* lss Gv */
        op = R_SS;
        goto do_lxx;
    case 0x1b4: /* lfs Gv */
        op = R_FS;
        goto do_lxx;
    case 0x1b5: /* lgs Gv */
        op = R_GS;
    do_lxx:
        ot = dflag ? OT_LONG : OT_WORD;
        modrm = cpu_ldub_code(env, s->pc++);
        reg = ((modrm >> 3) & 7) | rex_r;
        mod = (modrm >> 6) & 3;
        if (mod == 3)
            goto illegal_op;
        gen_lea_modrm(env, s, modrm, &reg_addr, &offset_addr);
        gen_op_ld_T1_A0(ot + s->mem_index);
        gen_add_A0_im(s, 1 << (ot - OT_WORD + 1));
        /* load the segment first to handle exceptions properly */
        gen_op_ldu_T0_A0(OT_WORD + s->mem_index);
        gen_movl_seg_T0(s, op, pc_start - s->cs_base);
        /* then put the data */
        gen_op_mov_reg_T1(ot, reg);
        if (s->is_jmp) {
            gen_jmp_im(s->pc - s->cs_base);
            gen_eob(s);
        }
        break;

        /************************/
        /* shifts */
    case 0xc0:
    case 0xc1:
        /* shift Ev,Ib */
        shift = 2;
    grp2:
        {
            if ((b & 1) == 0)
                ot = OT_BYTE;
            else
                ot = dflag + OT_WORD;

            modrm = cpu_ldub_code(env, s->pc++);
            mod = (modrm >> 6) & 3;
            op = (modrm >> 3) & 7;

            if (mod != 3) {
                if (shift == 2) {
                    s->rip_offset = 1;
                }
                gen_lea_modrm(env, s, modrm, &reg_addr, &offset_addr);
                opreg = OR_TMP0;
            } else {
                opreg = (modrm & 7) | REX_B(s);
            }

            /* simpler op */
            if (shift == 0) {
                gen_shift(s, op, ot, opreg, OR_ECX);
            } else {
                if (shift == 2) {
                    shift = cpu_ldub_code(env, s->pc++);
                }
                gen_shifti(s, op, ot, opreg, shift);
            }
        }
        break;
    case 0xd0:
    case 0xd1:
        /* shift Ev,1 */
        shift = 1;
        goto grp2;
    case 0xd2:
    case 0xd3:
        /* shift Ev,cl */
        shift = 0;
        goto grp2;

    case 0x1a4: /* shld imm */
        op = 0;
        shift = 1;
        goto do_shiftd;
    case 0x1a5: /* shld cl */
        op = 0;
        shift = 0;
        goto do_shiftd;
    case 0x1ac: /* shrd imm */
        op = 1;
        shift = 1;
        goto do_shiftd;
    case 0x1ad: /* shrd cl */
        op = 1;
        shift = 0;
    do_shiftd:
        ot = dflag + OT_WORD;
        modrm = cpu_ldub_code(env, s->pc++);
        mod = (modrm >> 6) & 3;
        rm = (modrm & 7) | REX_B(s);
        reg = ((modrm >> 3) & 7) | rex_r;
        if (mod != 3) {
            gen_lea_modrm(env, s, modrm, &reg_addr, &offset_addr);
            opreg = OR_TMP0;
        } else {
            opreg = rm;
        }
        gen_op_mov_TN_reg(ot, 1, reg);

        if (shift) {
            TCGv imm = tcg_const_tl(cpu_ldub_code(env, s->pc++));
            gen_shiftd_rm_T1(s, ot, opreg, op, imm);
            tcg_temp_free(imm);
        } else {
            gen_shiftd_rm_T1(s, ot, opreg, op, cpu_regs[R_ECX]);
        }
        break;

        /************************/
        /* floats */
    case 0xd8 ... 0xdf:
        if (s->flags & (HF_EM_MASK | HF_TS_MASK)) {
            /* if CR0.EM or CR0.TS are set, generate an FPU exception */
            /* XXX: what to do if illegal op ? */
            gen_exception(s, EXCP07_PREX, pc_start - s->cs_base);
            break;
        }
        modrm = cpu_ldub_code(env, s->pc++);
        mod = (modrm >> 6) & 3;
        rm = modrm & 7;
        op = ((b & 7) << 3) | ((modrm >> 3) & 7);
        if (mod != 3) {
            /* memory op */
            gen_lea_modrm(env, s, modrm, &reg_addr, &offset_addr);
            switch(op) {
            case 0x00 ... 0x07: /* fxxxs */
            case 0x10 ... 0x17: /* fixxxl */
            case 0x20 ... 0x27: /* fxxxl */
            case 0x30 ... 0x37: /* fixxx */
                {
                    int op1;
                    op1 = op & 7;

                    switch(op >> 4) {
                    case 0:
                        gen_op_ld_T0_A0(OT_LONG + s->mem_index);
                        tcg_gen_trunc_tl_i32(cpu_tmp2_i32, cpu_T[0]);
                        gen_helper_flds_FT0(cpu_env, cpu_tmp2_i32);
                        break;
                    case 1:
                        gen_op_ld_T0_A0(OT_LONG + s->mem_index);
                        tcg_gen_trunc_tl_i32(cpu_tmp2_i32, cpu_T[0]);
                        gen_helper_fildl_FT0(cpu_env, cpu_tmp2_i32);
                        break;
                    case 2:
                        tcg_gen_qemu_ld64(cpu_tmp1_i64, cpu_A0, 
                                          (s->mem_index >> 2) - 1);
                        gen_helper_fldl_FT0(cpu_env, cpu_tmp1_i64);
                        break;
                    case 3:
                    default:
                        gen_op_lds_T0_A0(OT_WORD + s->mem_index);
                        tcg_gen_trunc_tl_i32(cpu_tmp2_i32, cpu_T[0]);
                        gen_helper_fildl_FT0(cpu_env, cpu_tmp2_i32);
                        break;
                    }

                    gen_helper_fp_arith_ST0_FT0(op1);
                    if (op1 == 3) {
                        /* fcomp needs pop */
                        gen_helper_fpop(cpu_env);
                    }
                }
                break;
            case 0x08: /* flds */
            case 0x0a: /* fsts */
            case 0x0b: /* fstps */
            case 0x18 ... 0x1b: /* fildl, fisttpl, fistl, fistpl */
            case 0x28 ... 0x2b: /* fldl, fisttpll, fstl, fstpl */
            case 0x38 ... 0x3b: /* filds, fisttps, fists, fistps */
                switch(op & 7) {
                case 0:
                    switch(op >> 4) {
                    case 0:
                        gen_op_ld_T0_A0(OT_LONG + s->mem_index);
                        tcg_gen_trunc_tl_i32(cpu_tmp2_i32, cpu_T[0]);
                        gen_helper_flds_ST0(cpu_env, cpu_tmp2_i32);
                        break;
                    case 1:
                        gen_op_ld_T0_A0(OT_LONG + s->mem_index);
                        tcg_gen_trunc_tl_i32(cpu_tmp2_i32, cpu_T[0]);
                        gen_helper_fildl_ST0(cpu_env, cpu_tmp2_i32);
                        break;
                    case 2:
                        tcg_gen_qemu_ld64(cpu_tmp1_i64, cpu_A0, 
                                          (s->mem_index >> 2) - 1);
                        gen_helper_fldl_ST0(cpu_env, cpu_tmp1_i64);
                        break;
                    case 3:
                    default:
                        gen_op_lds_T0_A0(OT_WORD + s->mem_index);
                        tcg_gen_trunc_tl_i32(cpu_tmp2_i32, cpu_T[0]);
                        gen_helper_fildl_ST0(cpu_env, cpu_tmp2_i32);
                        break;
                    }
                    break;
                case 1:
                    /* XXX: the corresponding CPUID bit must be tested ! */
                    switch(op >> 4) {
                    case 1:
                        gen_helper_fisttl_ST0(cpu_tmp2_i32, cpu_env);
                        tcg_gen_extu_i32_tl(cpu_T[0], cpu_tmp2_i32);
                        gen_op_st_T0_A0(OT_LONG + s->mem_index);
                        break;
                    case 2:
                        gen_helper_fisttll_ST0(cpu_tmp1_i64, cpu_env);
                        tcg_gen_qemu_st64(cpu_tmp1_i64, cpu_A0, 
                                          (s->mem_index >> 2) - 1);
                        break;
                    case 3:
                    default:
                        gen_helper_fistt_ST0(cpu_tmp2_i32, cpu_env);
                        tcg_gen_extu_i32_tl(cpu_T[0], cpu_tmp2_i32);
                        gen_op_st_T0_A0(OT_WORD + s->mem_index);
                        break;
                    }
                    gen_helper_fpop(cpu_env);
                    break;
                default:
                    switch(op >> 4) {
                    case 0:
                        gen_helper_fsts_ST0(cpu_tmp2_i32, cpu_env);
                        tcg_gen_extu_i32_tl(cpu_T[0], cpu_tmp2_i32);
                        gen_op_st_T0_A0(OT_LONG + s->mem_index);
                        break;
                    case 1:
                        gen_helper_fistl_ST0(cpu_tmp2_i32, cpu_env);
                        tcg_gen_extu_i32_tl(cpu_T[0], cpu_tmp2_i32);
                        gen_op_st_T0_A0(OT_LONG + s->mem_index);
                        break;
                    case 2:
                        gen_helper_fstl_ST0(cpu_tmp1_i64, cpu_env);
                        tcg_gen_qemu_st64(cpu_tmp1_i64, cpu_A0, 
                                          (s->mem_index >> 2) - 1);
                        break;
                    case 3:
                    default:
                        gen_helper_fist_ST0(cpu_tmp2_i32, cpu_env);
                        tcg_gen_extu_i32_tl(cpu_T[0], cpu_tmp2_i32);
                        gen_op_st_T0_A0(OT_WORD + s->mem_index);
                        break;
                    }
                    if ((op & 7) == 3)
                        gen_helper_fpop(cpu_env);
                    break;
                }
                break;
            case 0x0c: /* fldenv mem */
                gen_update_cc_op(s);
                gen_jmp_im(pc_start - s->cs_base);
                gen_helper_fldenv(cpu_env, cpu_A0, tcg_const_i32(s->dflag));
                break;
            case 0x0d: /* fldcw mem */
                gen_op_ld_T0_A0(OT_WORD + s->mem_index);
                tcg_gen_trunc_tl_i32(cpu_tmp2_i32, cpu_T[0]);
                gen_helper_fldcw(cpu_env, cpu_tmp2_i32);
                break;
            case 0x0e: /* fnstenv mem */
                gen_update_cc_op(s);
                gen_jmp_im(pc_start - s->cs_base);
                gen_helper_fstenv(cpu_env, cpu_A0, tcg_const_i32(s->dflag));
                break;
            case 0x0f: /* fnstcw mem */
                gen_helper_fnstcw(cpu_tmp2_i32, cpu_env);
                tcg_gen_extu_i32_tl(cpu_T[0], cpu_tmp2_i32);
                gen_op_st_T0_A0(OT_WORD + s->mem_index);
                break;
            case 0x1d: /* fldt mem */
                gen_update_cc_op(s);
                gen_jmp_im(pc_start - s->cs_base);
                gen_helper_fldt_ST0(cpu_env, cpu_A0);
                break;
            case 0x1f: /* fstpt mem */
                gen_update_cc_op(s);
                gen_jmp_im(pc_start - s->cs_base);
                gen_helper_fstt_ST0(cpu_env, cpu_A0);
                gen_helper_fpop(cpu_env);
                break;
            case 0x2c: /* frstor mem */
                gen_update_cc_op(s);
                gen_jmp_im(pc_start - s->cs_base);
                gen_helper_frstor(cpu_env, cpu_A0, tcg_const_i32(s->dflag));
                break;
            case 0x2e: /* fnsave mem */
                gen_update_cc_op(s);
                gen_jmp_im(pc_start - s->cs_base);
                gen_helper_fsave(cpu_env, cpu_A0, tcg_const_i32(s->dflag));
                break;
            case 0x2f: /* fnstsw mem */
                gen_helper_fnstsw(cpu_tmp2_i32, cpu_env);
                tcg_gen_extu_i32_tl(cpu_T[0], cpu_tmp2_i32);
                gen_op_st_T0_A0(OT_WORD + s->mem_index);
                break;
            case 0x3c: /* fbld */
                gen_update_cc_op(s);
                gen_jmp_im(pc_start - s->cs_base);
                gen_helper_fbld_ST0(cpu_env, cpu_A0);
                break;
            case 0x3e: /* fbstp */
                gen_update_cc_op(s);
                gen_jmp_im(pc_start - s->cs_base);
                gen_helper_fbst_ST0(cpu_env, cpu_A0);
                gen_helper_fpop(cpu_env);
                break;
            case 0x3d: /* fildll */
                tcg_gen_qemu_ld64(cpu_tmp1_i64, cpu_A0, 
                                  (s->mem_index >> 2) - 1);
                gen_helper_fildll_ST0(cpu_env, cpu_tmp1_i64);
                break;
            case 0x3f: /* fistpll */
                gen_helper_fistll_ST0(cpu_tmp1_i64, cpu_env);
                tcg_gen_qemu_st64(cpu_tmp1_i64, cpu_A0, 
                                  (s->mem_index >> 2) - 1);
                gen_helper_fpop(cpu_env);
                break;
            default:
                goto illegal_op;
            }
        } else {
            /* register float ops */
            opreg = rm;

            switch(op) {
            case 0x08: /* fld sti */
                gen_helper_fpush(cpu_env);
                gen_helper_fmov_ST0_STN(cpu_env,
                                        tcg_const_i32((opreg + 1) & 7));
                break;
            case 0x09: /* fxchg sti */
            case 0x29: /* fxchg4 sti, undocumented op */
            case 0x39: /* fxchg7 sti, undocumented op */
                gen_helper_fxchg_ST0_STN(cpu_env, tcg_const_i32(opreg));
                break;
            case 0x0a: /* grp d9/2 */
                switch(rm) {
                case 0: /* fnop */
                    /* check exceptions (FreeBSD FPU probe) */
                    gen_update_cc_op(s);
                    gen_jmp_im(pc_start - s->cs_base);
                    gen_helper_fwait(cpu_env);
                    break;
                default:
                    goto illegal_op;
                }
                break;
            case 0x0c: /* grp d9/4 */
                switch(rm) {
                case 0: /* fchs */
                    gen_helper_fchs_ST0(cpu_env);
                    break;
                case 1: /* fabs */
                    gen_helper_fabs_ST0(cpu_env);
                    break;
                case 4: /* ftst */
                    gen_helper_fldz_FT0(cpu_env);
                    gen_helper_fcom_ST0_FT0(cpu_env);
                    break;
                case 5: /* fxam */
                    gen_helper_fxam_ST0(cpu_env);
                    break;
                default:
                    goto illegal_op;
                }
                break;
            case 0x0d: /* grp d9/5 */
                {
                    switch(rm) {
                    case 0:
                        gen_helper_fpush(cpu_env);
                        gen_helper_fld1_ST0(cpu_env);
                        break;
                    case 1:
                        gen_helper_fpush(cpu_env);
                        gen_helper_fldl2t_ST0(cpu_env);
                        break;
                    case 2:
                        gen_helper_fpush(cpu_env);
                        gen_helper_fldl2e_ST0(cpu_env);
                        break;
                    case 3:
                        gen_helper_fpush(cpu_env);
                        gen_helper_fldpi_ST0(cpu_env);
                        break;
                    case 4:
                        gen_helper_fpush(cpu_env);
                        gen_helper_fldlg2_ST0(cpu_env);
                        break;
                    case 5:
                        gen_helper_fpush(cpu_env);
                        gen_helper_fldln2_ST0(cpu_env);
                        break;
                    case 6:
                        gen_helper_fpush(cpu_env);
                        gen_helper_fldz_ST0(cpu_env);
                        break;
                    default:
                        goto illegal_op;
                    }
                }
                break;
            case 0x0e: /* grp d9/6 */
                switch(rm) {
                case 0: /* f2xm1 */
                    gen_helper_f2xm1(cpu_env);
                    break;
                case 1: /* fyl2x */
                    gen_helper_fyl2x(cpu_env);
                    break;
                case 2: /* fptan */
                    gen_helper_fptan(cpu_env);
                    break;
                case 3: /* fpatan */
                    gen_helper_fpatan(cpu_env);
                    break;
                case 4: /* fxtract */
                    gen_helper_fxtract(cpu_env);
                    break;
                case 5: /* fprem1 */
                    gen_helper_fprem1(cpu_env);
                    break;
                case 6: /* fdecstp */
                    gen_helper_fdecstp(cpu_env);
                    break;
                default:
                case 7: /* fincstp */
                    gen_helper_fincstp(cpu_env);
                    break;
                }
                break;
            case 0x0f: /* grp d9/7 */
                switch(rm) {
                case 0: /* fprem */
                    gen_helper_fprem(cpu_env);
                    break;
                case 1: /* fyl2xp1 */
                    gen_helper_fyl2xp1(cpu_env);
                    break;
                case 2: /* fsqrt */
                    gen_helper_fsqrt(cpu_env);
                    break;
                case 3: /* fsincos */
                    gen_helper_fsincos(cpu_env);
                    break;
                case 5: /* fscale */
                    gen_helper_fscale(cpu_env);
                    break;
                case 4: /* frndint */
                    gen_helper_frndint(cpu_env);
                    break;
                case 6: /* fsin */
                    gen_helper_fsin(cpu_env);
                    break;
                default:
                case 7: /* fcos */
                    gen_helper_fcos(cpu_env);
                    break;
                }
                break;
            case 0x00: case 0x01: case 0x04 ... 0x07: /* fxxx st, sti */
            case 0x20: case 0x21: case 0x24 ... 0x27: /* fxxx sti, st */
            case 0x30: case 0x31: case 0x34 ... 0x37: /* fxxxp sti, st */
                {
                    int op1;

                    op1 = op & 7;
                    if (op >= 0x20) {
                        gen_helper_fp_arith_STN_ST0(op1, opreg);
                        if (op >= 0x30)
                            gen_helper_fpop(cpu_env);
                    } else {
                        gen_helper_fmov_FT0_STN(cpu_env, tcg_const_i32(opreg));
                        gen_helper_fp_arith_ST0_FT0(op1);
                    }
                }
                break;
            case 0x02: /* fcom */
            case 0x22: /* fcom2, undocumented op */
                gen_helper_fmov_FT0_STN(cpu_env, tcg_const_i32(opreg));
                gen_helper_fcom_ST0_FT0(cpu_env);
                break;
            case 0x03: /* fcomp */
            case 0x23: /* fcomp3, undocumented op */
            case 0x32: /* fcomp5, undocumented op */
                gen_helper_fmov_FT0_STN(cpu_env, tcg_const_i32(opreg));
                gen_helper_fcom_ST0_FT0(cpu_env);
                gen_helper_fpop(cpu_env);
                break;
            case 0x15: /* da/5 */
                switch(rm) {
                case 1: /* fucompp */
                    gen_helper_fmov_FT0_STN(cpu_env, tcg_const_i32(1));
                    gen_helper_fucom_ST0_FT0(cpu_env);
                    gen_helper_fpop(cpu_env);
                    gen_helper_fpop(cpu_env);
                    break;
                default:
                    goto illegal_op;
                }
                break;
            case 0x1c:
                switch(rm) {
                case 0: /* feni (287 only, just do nop here) */
                    break;
                case 1: /* fdisi (287 only, just do nop here) */
                    break;
                case 2: /* fclex */
                    gen_helper_fclex(cpu_env);
                    break;
                case 3: /* fninit */
                    gen_helper_fninit(cpu_env);
                    break;
                case 4: /* fsetpm (287 only, just do nop here) */
                    break;
                default:
                    goto illegal_op;
                }
                break;
            case 0x1d: /* fucomi */
                gen_update_cc_op(s);
                gen_helper_fmov_FT0_STN(cpu_env, tcg_const_i32(opreg));
                gen_helper_fucomi_ST0_FT0(cpu_env);
                set_cc_op(s, CC_OP_EFLAGS);
                break;
            case 0x1e: /* fcomi */
                gen_update_cc_op(s);
                gen_helper_fmov_FT0_STN(cpu_env, tcg_const_i32(opreg));
                gen_helper_fcomi_ST0_FT0(cpu_env);
                set_cc_op(s, CC_OP_EFLAGS);
                break;
            case 0x28: /* ffree sti */
                gen_helper_ffree_STN(cpu_env, tcg_const_i32(opreg));
                break;
            case 0x2a: /* fst sti */
                gen_helper_fmov_STN_ST0(cpu_env, tcg_const_i32(opreg));
                break;
            case 0x2b: /* fstp sti */
            case 0x0b: /* fstp1 sti, undocumented op */
            case 0x3a: /* fstp8 sti, undocumented op */
            case 0x3b: /* fstp9 sti, undocumented op */
                gen_helper_fmov_STN_ST0(cpu_env, tcg_const_i32(opreg));
                gen_helper_fpop(cpu_env);
                break;
            case 0x2c: /* fucom st(i) */
                gen_helper_fmov_FT0_STN(cpu_env, tcg_const_i32(opreg));
                gen_helper_fucom_ST0_FT0(cpu_env);
                break;
            case 0x2d: /* fucomp st(i) */
                gen_helper_fmov_FT0_STN(cpu_env, tcg_const_i32(opreg));
                gen_helper_fucom_ST0_FT0(cpu_env);
                gen_helper_fpop(cpu_env);
                break;
            case 0x33: /* de/3 */
                switch(rm) {
                case 1: /* fcompp */
                    gen_helper_fmov_FT0_STN(cpu_env, tcg_const_i32(1));
                    gen_helper_fcom_ST0_FT0(cpu_env);
                    gen_helper_fpop(cpu_env);
                    gen_helper_fpop(cpu_env);
                    break;
                default:
                    goto illegal_op;
                }
                break;
            case 0x38: /* ffreep sti, undocumented op */
                gen_helper_ffree_STN(cpu_env, tcg_const_i32(opreg));
                gen_helper_fpop(cpu_env);
                break;
            case 0x3c: /* df/4 */
                switch(rm) {
                case 0:
                    gen_helper_fnstsw(cpu_tmp2_i32, cpu_env);
                    tcg_gen_extu_i32_tl(cpu_T[0], cpu_tmp2_i32);
                    gen_op_mov_reg_T0(OT_WORD, R_EAX);
                    break;
                default:
                    goto illegal_op;
                }
                break;
            case 0x3d: /* fucomip */
                gen_update_cc_op(s);
                gen_helper_fmov_FT0_STN(cpu_env, tcg_const_i32(opreg));
                gen_helper_fucomi_ST0_FT0(cpu_env);
                gen_helper_fpop(cpu_env);
                set_cc_op(s, CC_OP_EFLAGS);
                break;
            case 0x3e: /* fcomip */
                gen_update_cc_op(s);
                gen_helper_fmov_FT0_STN(cpu_env, tcg_const_i32(opreg));
                gen_helper_fcomi_ST0_FT0(cpu_env);
                gen_helper_fpop(cpu_env);
                set_cc_op(s, CC_OP_EFLAGS);
                break;
            case 0x10 ... 0x13: /* fcmovxx */
            case 0x18 ... 0x1b:
                {
                    int op1, l1;
                    static const uint8_t fcmov_cc[8] = {
                        (JCC_B << 1),
                        (JCC_Z << 1),
                        (JCC_BE << 1),
                        (JCC_P << 1),
                    };
                    op1 = fcmov_cc[op & 3] | (((op >> 3) & 1) ^ 1);
                    l1 = gen_new_label();
                    gen_jcc1_noeob(s, op1, l1);
                    gen_helper_fmov_ST0_STN(cpu_env, tcg_const_i32(opreg));
                    gen_set_label(l1);
                }
                break;
            default:
                goto illegal_op;
            }
        }
        break;
        /************************/
        /* string ops */

    case 0xa4: /* movsS */
    case 0xa5:
        if ((b & 1) == 0)
            ot = OT_BYTE;
        else
            ot = dflag + OT_WORD;

        if (prefixes & (PREFIX_REPZ | PREFIX_REPNZ)) {
            gen_repz_movs(s, ot, pc_start - s->cs_base, s->pc - s->cs_base);
        } else {
            gen_movs(s, ot);
        }
        break;

    case 0xaa: /* stosS */
    case 0xab:
        if ((b & 1) == 0)
            ot = OT_BYTE;
        else
            ot = dflag + OT_WORD;

        if (prefixes & (PREFIX_REPZ | PREFIX_REPNZ)) {
            gen_repz_stos(s, ot, pc_start - s->cs_base, s->pc - s->cs_base);
        } else {
            gen_stos(s, ot);
        }
        break;
    case 0xac: /* lodsS */
    case 0xad:
        if ((b & 1) == 0)
            ot = OT_BYTE;
        else
            ot = dflag + OT_WORD;
        if (prefixes & (PREFIX_REPZ | PREFIX_REPNZ)) {
            gen_repz_lods(s, ot, pc_start - s->cs_base, s->pc - s->cs_base);
        } else {
            gen_lods(s, ot);
        }
        break;
    case 0xae: /* scasS */
    case 0xaf:
        if ((b & 1) == 0)
            ot = OT_BYTE;
        else
            ot = dflag + OT_WORD;
        if (prefixes & PREFIX_REPNZ) {
            gen_repz_scas(s, ot, pc_start - s->cs_base, s->pc - s->cs_base, 1);
        } else if (prefixes & PREFIX_REPZ) {
            gen_repz_scas(s, ot, pc_start - s->cs_base, s->pc - s->cs_base, 0);
        } else {
            gen_scas(s, ot);
        }
        break;

    case 0xa6: /* cmpsS */
    case 0xa7:
        if ((b & 1) == 0)
            ot = OT_BYTE;
        else
            ot = dflag + OT_WORD;
        if (prefixes & PREFIX_REPNZ) {
            gen_repz_cmps(s, ot, pc_start - s->cs_base, s->pc - s->cs_base, 1);
        } else if (prefixes & PREFIX_REPZ) {
            gen_repz_cmps(s, ot, pc_start - s->cs_base, s->pc - s->cs_base, 0);
        } else {
            gen_cmps(s, ot);
        }
        break;
    case 0x6c: /* insS */
    case 0x6d:
        if ((b & 1) == 0)
            ot = OT_BYTE;
        else
            ot = dflag ? OT_LONG : OT_WORD;
        gen_op_mov_TN_reg(OT_WORD, 0, R_EDX);
        gen_op_andl_T0_ffff();
        gen_check_io(s, ot, pc_start - s->cs_base, 
                     SVM_IOIO_TYPE_MASK | svm_is_rep(prefixes) | 4);
        if (prefixes & (PREFIX_REPZ | PREFIX_REPNZ)) {
            gen_repz_ins(s, ot, pc_start - s->cs_base, s->pc - s->cs_base);
        } else {
            gen_ins(s, ot);
            if (use_icount) {
                gen_jmp(s, s->pc - s->cs_base);
            }
        }
        break;
    case 0x6e: /* outsS */
    case 0x6f:
        if ((b & 1) == 0)
            ot = OT_BYTE;
        else
            ot = dflag ? OT_LONG : OT_WORD;
        gen_op_mov_TN_reg(OT_WORD, 0, R_EDX);
        gen_op_andl_T0_ffff();
        gen_check_io(s, ot, pc_start - s->cs_base,
                     svm_is_rep(prefixes) | 4);
        if (prefixes & (PREFIX_REPZ | PREFIX_REPNZ)) {
            gen_repz_outs(s, ot, pc_start - s->cs_base, s->pc - s->cs_base);
        } else {
            gen_outs(s, ot);
            if (use_icount) {
                gen_jmp(s, s->pc - s->cs_base);
            }
        }
        break;

        /************************/
        /* port I/O */

    case 0xe4:
    case 0xe5:
        if ((b & 1) == 0)
            ot = OT_BYTE;
        else
            ot = dflag ? OT_LONG : OT_WORD;
        val = cpu_ldub_code(env, s->pc++);
        gen_op_movl_T0_im(val);
        gen_check_io(s, ot, pc_start - s->cs_base,
                     SVM_IOIO_TYPE_MASK | svm_is_rep(prefixes));
        if (use_icount)
            gen_io_start();
        tcg_gen_trunc_tl_i32(cpu_tmp2_i32, cpu_T[0]);
        gen_helper_in_func(ot, cpu_T[1], cpu_tmp2_i32);
        gen_op_mov_reg_T1(ot, R_EAX);
        if (use_icount) {
            gen_io_end();
            gen_jmp(s, s->pc - s->cs_base);
        }
        break;
    case 0xe6:
    case 0xe7:
        if ((b & 1) == 0)
            ot = OT_BYTE;
        else
            ot = dflag ? OT_LONG : OT_WORD;
        val = cpu_ldub_code(env, s->pc++);
        gen_op_movl_T0_im(val);
        gen_check_io(s, ot, pc_start - s->cs_base,
                     svm_is_rep(prefixes));
        gen_op_mov_TN_reg(ot, 1, R_EAX);

        if (use_icount)
            gen_io_start();
        tcg_gen_trunc_tl_i32(cpu_tmp2_i32, cpu_T[0]);
        tcg_gen_trunc_tl_i32(cpu_tmp3_i32, cpu_T[1]);
        gen_helper_out_func(ot, cpu_tmp2_i32, cpu_tmp3_i32);
        if (use_icount) {
            gen_io_end();
            gen_jmp(s, s->pc - s->cs_base);
        }
        break;
    case 0xec:
    case 0xed:
        if ((b & 1) == 0)
            ot = OT_BYTE;
        else
            ot = dflag ? OT_LONG : OT_WORD;
        gen_op_mov_TN_reg(OT_WORD, 0, R_EDX);
        gen_op_andl_T0_ffff();
        gen_check_io(s, ot, pc_start - s->cs_base,
                     SVM_IOIO_TYPE_MASK | svm_is_rep(prefixes));
        if (use_icount)
            gen_io_start();
        tcg_gen_trunc_tl_i32(cpu_tmp2_i32, cpu_T[0]);
        gen_helper_in_func(ot, cpu_T[1], cpu_tmp2_i32);
        gen_op_mov_reg_T1(ot, R_EAX);
        if (use_icount) {
            gen_io_end();
            gen_jmp(s, s->pc - s->cs_base);
        }
        break;
    case 0xee:
    case 0xef:
        if ((b & 1) == 0)
            ot = OT_BYTE;
        else
            ot = dflag ? OT_LONG : OT_WORD;
        gen_op_mov_TN_reg(OT_WORD, 0, R_EDX);
        gen_op_andl_T0_ffff();
        gen_check_io(s, ot, pc_start - s->cs_base,
                     svm_is_rep(prefixes));
        gen_op_mov_TN_reg(ot, 1, R_EAX);

        if (use_icount)
            gen_io_start();
        tcg_gen_trunc_tl_i32(cpu_tmp2_i32, cpu_T[0]);
        tcg_gen_trunc_tl_i32(cpu_tmp3_i32, cpu_T[1]);
        gen_helper_out_func(ot, cpu_tmp2_i32, cpu_tmp3_i32);
        if (use_icount) {
            gen_io_end();
            gen_jmp(s, s->pc - s->cs_base);
        }
        break;

        /************************/
        /* control */
    case 0xc2: /* ret im */
        val = cpu_ldsw_code(env, s->pc);
        s->pc += 2;
        gen_pop_T0(s);
        if (CODE64(s) && s->dflag)
            s->dflag = 2;
        gen_stack_update(s, val + (2 << s->dflag));
        if (s->dflag == 0)
            gen_op_andl_T0_ffff();
        gen_op_jmp_T0();
        gen_eob(s);
        break;
    case 0xc3: /* ret */
        gen_pop_T0(s);
        gen_pop_update(s);
        if (s->dflag == 0)
            gen_op_andl_T0_ffff();
        gen_op_jmp_T0();
        gen_eob(s);
        break;
    case 0xca: /* lret im */
        val = cpu_ldsw_code(env, s->pc);
        s->pc += 2;
    do_lret:
        if (s->pe && !s->vm86) {
            gen_update_cc_op(s);
            gen_jmp_im(pc_start - s->cs_base);
            gen_helper_lret_protected(cpu_env, tcg_const_i32(s->dflag),
                                      tcg_const_i32(val));
        } else {
            gen_stack_A0(s);
            /* pop offset */
            gen_op_ld_T0_A0(1 + s->dflag + s->mem_index);
            if (s->dflag == 0)
                gen_op_andl_T0_ffff();
            /* NOTE: keeping EIP updated is not a problem in case of
               exception */
            gen_op_jmp_T0();
            /* pop selector */
            gen_op_addl_A0_im(2 << s->dflag);
            gen_op_ld_T0_A0(1 + s->dflag + s->mem_index);
            gen_op_movl_seg_T0_vm(R_CS);
            /* add stack offset */
            gen_stack_update(s, val + (4 << s->dflag));
        }
        gen_eob(s);
        break;
    case 0xcb: /* lret */
        val = 0;
        goto do_lret;
    case 0xcf: /* iret */
        gen_svm_check_intercept(s, pc_start, SVM_EXIT_IRET);
        if (!s->pe) {
            /* real mode */
            gen_helper_iret_real(cpu_env, tcg_const_i32(s->dflag));
            set_cc_op(s, CC_OP_EFLAGS);
        } else if (s->vm86) {
            if (s->iopl != 3) {
                gen_exception(s, EXCP0D_GPF, pc_start - s->cs_base);
            } else {
                gen_helper_iret_real(cpu_env, tcg_const_i32(s->dflag));
                set_cc_op(s, CC_OP_EFLAGS);
            }
        } else {
            gen_update_cc_op(s);
            gen_jmp_im(pc_start - s->cs_base);
            gen_helper_iret_protected(cpu_env, tcg_const_i32(s->dflag),
                                      tcg_const_i32(s->pc - s->cs_base));
            set_cc_op(s, CC_OP_EFLAGS);
        }
        gen_eob(s);
        break;
    case 0xe8: /* call im */
        {
            if (dflag)
                tval = (int32_t)insn_get(env, s, OT_LONG);
            else
                tval = (int16_t)insn_get(env, s, OT_WORD);
            next_eip = s->pc - s->cs_base;
            tval += next_eip;
            if (s->dflag == 0)
                tval &= 0xffff;
            else if(!CODE64(s))
                tval &= 0xffffffff;
            gen_movtl_T0_im(next_eip);
            gen_push_T0(s);
            gen_jmp(s, tval);
        }
        break;
    case 0x9a: /* lcall im */
        {
            unsigned int selector, offset;

            if (CODE64(s))
                goto illegal_op;
            ot = dflag ? OT_LONG : OT_WORD;
            offset = insn_get(env, s, ot);
            selector = insn_get(env, s, OT_WORD);

            gen_op_movl_T0_im(selector);
            gen_op_movl_T1_imu(offset);
        }
        goto do_lcall;
    case 0xe9: /* jmp im */
        if (dflag)
            tval = (int32_t)insn_get(env, s, OT_LONG);
        else
            tval = (int16_t)insn_get(env, s, OT_WORD);
        tval += s->pc - s->cs_base;
        if (s->dflag == 0)
            tval &= 0xffff;
        else if(!CODE64(s))
            tval &= 0xffffffff;
        gen_jmp(s, tval);
        break;
    case 0xea: /* ljmp im */
        {
            unsigned int selector, offset;

            if (CODE64(s))
                goto illegal_op;
            ot = dflag ? OT_LONG : OT_WORD;
            offset = insn_get(env, s, ot);
            selector = insn_get(env, s, OT_WORD);

            gen_op_movl_T0_im(selector);
            gen_op_movl_T1_imu(offset);
        }
        goto do_ljmp;
    case 0xeb: /* jmp Jb */
        tval = (int8_t)insn_get(env, s, OT_BYTE);
        tval += s->pc - s->cs_base;
        if (s->dflag == 0)
            tval &= 0xffff;
        gen_jmp(s, tval);
        break;
    case 0x70 ... 0x7f: /* jcc Jb */
        tval = (int8_t)insn_get(env, s, OT_BYTE);
        goto do_jcc;
    case 0x180 ... 0x18f: /* jcc Jv */
        if (dflag) {
            tval = (int32_t)insn_get(env, s, OT_LONG);
        } else {
            tval = (int16_t)insn_get(env, s, OT_WORD);
        }
    do_jcc:
        next_eip = s->pc - s->cs_base;
        tval += next_eip;
        if (s->dflag == 0)
            tval &= 0xffff;
        gen_jcc(s, b, tval, next_eip);
        break;

    case 0x190 ... 0x19f: /* setcc Gv */
        modrm = cpu_ldub_code(env, s->pc++);
        gen_setcc1(s, b, cpu_T[0]);
        gen_ldst_modrm(env, s, modrm, OT_BYTE, OR_TMP0, 1);
        break;
    case 0x140 ... 0x14f: /* cmov Gv, Ev */
        ot = dflag + OT_WORD;
        modrm = cpu_ldub_code(env, s->pc++);
        reg = ((modrm >> 3) & 7) | rex_r;
        gen_cmovcc1(env, s, ot, b, modrm, reg);
        break;

        /************************/
        /* flags */
    case 0x9c: /* pushf */
        gen_svm_check_intercept(s, pc_start, SVM_EXIT_PUSHF);
        if (s->vm86 && s->iopl != 3) {
            gen_exception(s, EXCP0D_GPF, pc_start - s->cs_base);
        } else {
            gen_update_cc_op(s);
            gen_helper_read_eflags(cpu_T[0], cpu_env);
            gen_push_T0(s);
        }
        break;
    case 0x9d: /* popf */
        gen_svm_check_intercept(s, pc_start, SVM_EXIT_POPF);
        if (s->vm86 && s->iopl != 3) {
            gen_exception(s, EXCP0D_GPF, pc_start - s->cs_base);
        } else {
            gen_pop_T0(s);
            if (s->cpl == 0) {
                if (s->dflag) {
                    gen_helper_write_eflags(cpu_env, cpu_T[0],
                                            tcg_const_i32((TF_MASK | AC_MASK |
                                                           ID_MASK | NT_MASK |
                                                           IF_MASK |
                                                           IOPL_MASK)));
                } else {
                    gen_helper_write_eflags(cpu_env, cpu_T[0],
                                            tcg_const_i32((TF_MASK | AC_MASK |
                                                           ID_MASK | NT_MASK |
                                                           IF_MASK | IOPL_MASK)
                                                          & 0xffff));
                }
            } else {
                if (s->cpl <= s->iopl) {
                    if (s->dflag) {
                        gen_helper_write_eflags(cpu_env, cpu_T[0],
                                                tcg_const_i32((TF_MASK |
                                                               AC_MASK |
                                                               ID_MASK |
                                                               NT_MASK |
                                                               IF_MASK)));
                    } else {
                        gen_helper_write_eflags(cpu_env, cpu_T[0],
                                                tcg_const_i32((TF_MASK |
                                                               AC_MASK |
                                                               ID_MASK |
                                                               NT_MASK |
                                                               IF_MASK)
                                                              & 0xffff));
                    }
                } else {
                    if (s->dflag) {
                        gen_helper_write_eflags(cpu_env, cpu_T[0],
                                           tcg_const_i32((TF_MASK | AC_MASK |
                                                          ID_MASK | NT_MASK)));
                    } else {
                        gen_helper_write_eflags(cpu_env, cpu_T[0],
                                           tcg_const_i32((TF_MASK | AC_MASK |
                                                          ID_MASK | NT_MASK)
                                                         & 0xffff));
                    }
                }
            }
            gen_pop_update(s);
            set_cc_op(s, CC_OP_EFLAGS);
            /* abort translation because TF/AC flag may change */
            gen_jmp_im(s->pc - s->cs_base);
            gen_eob(s);
        }
        break;
    case 0x9e: /* sahf */
        if (CODE64(s) && !(s->cpuid_ext3_features & CPUID_EXT3_LAHF_LM))
            goto illegal_op;
        gen_op_mov_TN_reg(OT_BYTE, 0, R_AH);
        gen_compute_eflags(s);
        tcg_gen_andi_tl(cpu_cc_src, cpu_cc_src, CC_O);
        tcg_gen_andi_tl(cpu_T[0], cpu_T[0], CC_S | CC_Z | CC_A | CC_P | CC_C);
        tcg_gen_or_tl(cpu_cc_src, cpu_cc_src, cpu_T[0]);
        break;
    case 0x9f: /* lahf */
        if (CODE64(s) && !(s->cpuid_ext3_features & CPUID_EXT3_LAHF_LM))
            goto illegal_op;
        gen_compute_eflags(s);
        /* Note: gen_compute_eflags() only gives the condition codes */
        tcg_gen_ori_tl(cpu_T[0], cpu_cc_src, 0x02);
        gen_op_mov_reg_T0(OT_BYTE, R_AH);
        break;
    case 0xf5: /* cmc */
        gen_compute_eflags(s);
        tcg_gen_xori_tl(cpu_cc_src, cpu_cc_src, CC_C);
        break;
    case 0xf8: /* clc */
        gen_compute_eflags(s);
        tcg_gen_andi_tl(cpu_cc_src, cpu_cc_src, ~CC_C);
        break;
    case 0xf9: /* stc */
        gen_compute_eflags(s);
        tcg_gen_ori_tl(cpu_cc_src, cpu_cc_src, CC_C);
        break;
    case 0xfc: /* cld */
        tcg_gen_movi_i32(cpu_tmp2_i32, 1);
        tcg_gen_st_i32(cpu_tmp2_i32, cpu_env, offsetof(CPUX86State, df));
        break;
    case 0xfd: /* std */
        tcg_gen_movi_i32(cpu_tmp2_i32, -1);
        tcg_gen_st_i32(cpu_tmp2_i32, cpu_env, offsetof(CPUX86State, df));
        break;

        /************************/
        /* bit operations */
    case 0x1ba: /* bt/bts/btr/btc Gv, im */
        ot = dflag + OT_WORD;
        modrm = cpu_ldub_code(env, s->pc++);
        op = (modrm >> 3) & 7;
        mod = (modrm >> 6) & 3;
        rm = (modrm & 7) | REX_B(s);
        if (mod != 3) {
            s->rip_offset = 1;
            gen_lea_modrm(env, s, modrm, &reg_addr, &offset_addr);
            gen_op_ld_T0_A0(ot + s->mem_index);
        } else {
            gen_op_mov_TN_reg(ot, 0, rm);
        }
        /* load shift */
        val = cpu_ldub_code(env, s->pc++);
        gen_op_movl_T1_im(val);
        if (op < 4)
            goto illegal_op;
        op -= 4;
        goto bt_op;
    case 0x1a3: /* bt Gv, Ev */
        op = 0;
        goto do_btx;
    case 0x1ab: /* bts */
        op = 1;
        goto do_btx;
    case 0x1b3: /* btr */
        op = 2;
        goto do_btx;
    case 0x1bb: /* btc */
        op = 3;
    do_btx:
        ot = dflag + OT_WORD;
        modrm = cpu_ldub_code(env, s->pc++);
        reg = ((modrm >> 3) & 7) | rex_r;
        mod = (modrm >> 6) & 3;
        rm = (modrm & 7) | REX_B(s);
        gen_op_mov_TN_reg(OT_LONG, 1, reg);
        if (mod != 3) {
            gen_lea_modrm(env, s, modrm, &reg_addr, &offset_addr);
            /* specific case: we need to add a displacement */
            gen_exts(ot, cpu_T[1]);
            tcg_gen_sari_tl(cpu_tmp0, cpu_T[1], 3 + ot);
            tcg_gen_shli_tl(cpu_tmp0, cpu_tmp0, ot);
            tcg_gen_add_tl(cpu_A0, cpu_A0, cpu_tmp0);
            gen_op_ld_T0_A0(ot + s->mem_index);
        } else {
            gen_op_mov_TN_reg(ot, 0, rm);
        }
    bt_op:
        tcg_gen_andi_tl(cpu_T[1], cpu_T[1], (1 << (3 + ot)) - 1);
        switch(op) {
        case 0:
            tcg_gen_shr_tl(cpu_cc_src, cpu_T[0], cpu_T[1]);
            tcg_gen_movi_tl(cpu_cc_dst, 0);
            break;
        case 1:
            tcg_gen_shr_tl(cpu_tmp4, cpu_T[0], cpu_T[1]);
            tcg_gen_movi_tl(cpu_tmp0, 1);
            tcg_gen_shl_tl(cpu_tmp0, cpu_tmp0, cpu_T[1]);
            tcg_gen_or_tl(cpu_T[0], cpu_T[0], cpu_tmp0);
            break;
        case 2:
            tcg_gen_shr_tl(cpu_tmp4, cpu_T[0], cpu_T[1]);
            tcg_gen_movi_tl(cpu_tmp0, 1);
            tcg_gen_shl_tl(cpu_tmp0, cpu_tmp0, cpu_T[1]);
            tcg_gen_not_tl(cpu_tmp0, cpu_tmp0);
            tcg_gen_and_tl(cpu_T[0], cpu_T[0], cpu_tmp0);
            break;
        default:
        case 3:
            tcg_gen_shr_tl(cpu_tmp4, cpu_T[0], cpu_T[1]);
            tcg_gen_movi_tl(cpu_tmp0, 1);
            tcg_gen_shl_tl(cpu_tmp0, cpu_tmp0, cpu_T[1]);
            tcg_gen_xor_tl(cpu_T[0], cpu_T[0], cpu_tmp0);
            break;
        }
        set_cc_op(s, CC_OP_SARB + ot);
        if (op != 0) {
            if (mod != 3)
                gen_op_st_T0_A0(ot + s->mem_index);
            else
                gen_op_mov_reg_T0(ot, rm);
            tcg_gen_mov_tl(cpu_cc_src, cpu_tmp4);
            tcg_gen_movi_tl(cpu_cc_dst, 0);
        }
        break;
    case 0x1bc: /* bsf */
    case 0x1bd: /* bsr */
        {
            int label1;
            TCGv t0;

            ot = dflag + OT_WORD;
            modrm = cpu_ldub_code(env, s->pc++);
            reg = ((modrm >> 3) & 7) | rex_r;
            gen_ldst_modrm(env, s,modrm, ot, OR_TMP0, 0);
            gen_extu(ot, cpu_T[0]);
            t0 = tcg_temp_local_new();
            tcg_gen_mov_tl(t0, cpu_T[0]);
            if ((b & 1) && (prefixes & PREFIX_REPZ) &&
                (s->cpuid_ext3_features & CPUID_EXT3_ABM)) {
                switch(ot) {
                case OT_WORD: gen_helper_lzcnt(cpu_T[0], t0,
                    tcg_const_i32(16)); break;
                case OT_LONG: gen_helper_lzcnt(cpu_T[0], t0,
                    tcg_const_i32(32)); break;
                case OT_QUAD: gen_helper_lzcnt(cpu_T[0], t0,
                    tcg_const_i32(64)); break;
                }
                gen_op_mov_reg_T0(ot, reg);
            } else {
                label1 = gen_new_label();
                tcg_gen_movi_tl(cpu_cc_dst, 0);
                tcg_gen_brcondi_tl(TCG_COND_EQ, t0, 0, label1);
                if (b & 1) {
                    gen_helper_bsr(cpu_T[0], t0);
                } else {
                    gen_helper_bsf(cpu_T[0], t0);
                }
                gen_op_mov_reg_T0(ot, reg);
                tcg_gen_movi_tl(cpu_cc_dst, 1);
                gen_set_label(label1);
                set_cc_op(s, CC_OP_LOGICB + ot);
            }
            tcg_temp_free(t0);
        }
        break;
        /************************/
        /* bcd */
    case 0x27: /* daa */
        if (CODE64(s))
            goto illegal_op;
        gen_update_cc_op(s);
        gen_helper_daa(cpu_env);
        set_cc_op(s, CC_OP_EFLAGS);
        break;
    case 0x2f: /* das */
        if (CODE64(s))
            goto illegal_op;
        gen_update_cc_op(s);
        gen_helper_das(cpu_env);
        set_cc_op(s, CC_OP_EFLAGS);
        break;
    case 0x37: /* aaa */
        if (CODE64(s))
            goto illegal_op;
        gen_update_cc_op(s);
        gen_helper_aaa(cpu_env);
        set_cc_op(s, CC_OP_EFLAGS);
        break;
    case 0x3f: /* aas */
        if (CODE64(s))
            goto illegal_op;
        gen_update_cc_op(s);
        gen_helper_aas(cpu_env);
        set_cc_op(s, CC_OP_EFLAGS);
        break;
    case 0xd4: /* aam */
        if (CODE64(s))
            goto illegal_op;
        val = cpu_ldub_code(env, s->pc++);
        if (val == 0) {
            gen_exception(s, EXCP00_DIVZ, pc_start - s->cs_base);
        } else {
            gen_helper_aam(cpu_env, tcg_const_i32(val));
            set_cc_op(s, CC_OP_LOGICB);
        }
        break;
    case 0xd5: /* aad */
        if (CODE64(s))
            goto illegal_op;
        val = cpu_ldub_code(env, s->pc++);
        gen_helper_aad(cpu_env, tcg_const_i32(val));
        set_cc_op(s, CC_OP_LOGICB);
        break;
        /************************/
        /* misc */
    case 0x90: /* nop */
        /* XXX: correct lock test for all insn */
        if (prefixes & PREFIX_LOCK) {
            goto illegal_op;
        }
        /* If REX_B is set, then this is xchg eax, r8d, not a nop.  */
        if (REX_B(s)) {
            goto do_xchg_reg_eax;
        }
        if (prefixes & PREFIX_REPZ) {
            gen_svm_check_intercept(s, pc_start, SVM_EXIT_PAUSE);
        }
        break;
    case 0x9b: /* fwait */
        if ((s->flags & (HF_MP_MASK | HF_TS_MASK)) ==
            (HF_MP_MASK | HF_TS_MASK)) {
            gen_exception(s, EXCP07_PREX, pc_start - s->cs_base);
        } else {
            gen_update_cc_op(s);
            gen_jmp_im(pc_start - s->cs_base);
            gen_helper_fwait(cpu_env);
        }
        break;
    case 0xcc: /* int3 */
        gen_interrupt(s, EXCP03_INT3, pc_start - s->cs_base, s->pc - s->cs_base);
        break;
    case 0xcd: /* int N */
        val = cpu_ldub_code(env, s->pc++);
        if (s->vm86 && s->iopl != 3) {
            gen_exception(s, EXCP0D_GPF, pc_start - s->cs_base);
        } else {
            gen_interrupt(s, val, pc_start - s->cs_base, s->pc - s->cs_base);
        }
        break;
    case 0xce: /* into */
        if (CODE64(s))
            goto illegal_op;
        gen_update_cc_op(s);
        gen_jmp_im(pc_start - s->cs_base);
        gen_helper_into(cpu_env, tcg_const_i32(s->pc - pc_start));
        break;
#ifdef WANT_ICEBP
    case 0xf1: /* icebp (undocumented, exits to external debugger) */
        gen_svm_check_intercept(s, pc_start, SVM_EXIT_ICEBP);
#if 1
        gen_debug(s, pc_start - s->cs_base);
#else
        /* start debug */
        tb_flush(env);
        qemu_set_log(CPU_LOG_INT | CPU_LOG_TB_IN_ASM);
#endif
        break;
#endif
    case 0xfa: /* cli */
        if (!s->vm86) {
            if (s->cpl <= s->iopl) {
                gen_helper_cli(cpu_env);
            } else {
                gen_exception(s, EXCP0D_GPF, pc_start - s->cs_base);
            }
        } else {
            if (s->iopl == 3) {
                gen_helper_cli(cpu_env);
            } else {
                gen_exception(s, EXCP0D_GPF, pc_start - s->cs_base);
            }
        }
        break;
    case 0xfb: /* sti */
        if (!s->vm86) {
            if (s->cpl <= s->iopl) {
            gen_sti:
                gen_helper_sti(cpu_env);
                /* interruptions are enabled only the first insn after sti */
                /* If several instructions disable interrupts, only the
                   _first_ does it */
                if (!(s->tb->flags & HF_INHIBIT_IRQ_MASK))
                    gen_helper_set_inhibit_irq(cpu_env);
                /* give a chance to handle pending irqs */
                gen_jmp_im(s->pc - s->cs_base);
                gen_eob(s);
            } else {
                gen_exception(s, EXCP0D_GPF, pc_start - s->cs_base);
            }
        } else {
            if (s->iopl == 3) {
                goto gen_sti;
            } else {
                gen_exception(s, EXCP0D_GPF, pc_start - s->cs_base);
            }
        }
        break;
    case 0x62: /* bound */
        if (CODE64(s))
            goto illegal_op;
        ot = dflag ? OT_LONG : OT_WORD;
        modrm = cpu_ldub_code(env, s->pc++);
        reg = (modrm >> 3) & 7;
        mod = (modrm >> 6) & 3;
        if (mod == 3)
            goto illegal_op;
        gen_op_mov_TN_reg(ot, 0, reg);
        gen_lea_modrm(env, s, modrm, &reg_addr, &offset_addr);
        gen_jmp_im(pc_start - s->cs_base);
        tcg_gen_trunc_tl_i32(cpu_tmp2_i32, cpu_T[0]);
        if (ot == OT_WORD) {
            gen_helper_boundw(cpu_env, cpu_A0, cpu_tmp2_i32);
        } else {
            gen_helper_boundl(cpu_env, cpu_A0, cpu_tmp2_i32);
        }
        break;
    case 0x1c8 ... 0x1cf: /* bswap reg */
        reg = (b & 7) | REX_B(s);
#ifdef TARGET_X86_64
        if (dflag == 2) {
            gen_op_mov_TN_reg(OT_QUAD, 0, reg);
            tcg_gen_bswap64_i64(cpu_T[0], cpu_T[0]);
            gen_op_mov_reg_T0(OT_QUAD, reg);
        } else
#endif
        {
            gen_op_mov_TN_reg(OT_LONG, 0, reg);
            tcg_gen_ext32u_tl(cpu_T[0], cpu_T[0]);
            tcg_gen_bswap32_tl(cpu_T[0], cpu_T[0]);
            gen_op_mov_reg_T0(OT_LONG, reg);
        }
        break;
    case 0xd6: /* salc */
        if (CODE64(s))
            goto illegal_op;
        gen_compute_eflags_c(s, cpu_T[0]);
        tcg_gen_neg_tl(cpu_T[0], cpu_T[0]);
        gen_op_mov_reg_T0(OT_BYTE, R_EAX);
        break;
    case 0xe0: /* loopnz */
    case 0xe1: /* loopz */
    case 0xe2: /* loop */
    case 0xe3: /* jecxz */
        {
            int l1, l2, l3;

            tval = (int8_t)insn_get(env, s, OT_BYTE);
            next_eip = s->pc - s->cs_base;
            tval += next_eip;
            if (s->dflag == 0)
                tval &= 0xffff;

            l1 = gen_new_label();
            l2 = gen_new_label();
            l3 = gen_new_label();
            b &= 3;
            switch(b) {
            case 0: /* loopnz */
            case 1: /* loopz */
                gen_op_add_reg_im(s->aflag, R_ECX, -1);
                gen_op_jz_ecx(s->aflag, l3);
                gen_jcc1(s, (JCC_Z << 1) | (b ^ 1), l1);
                break;
            case 2: /* loop */
                gen_op_add_reg_im(s->aflag, R_ECX, -1);
                gen_op_jnz_ecx(s->aflag, l1);
                break;
            default:
            case 3: /* jcxz */
                gen_op_jz_ecx(s->aflag, l1);
                break;
            }

            gen_set_label(l3);
            gen_jmp_im(next_eip);
            tcg_gen_br(l2);

            gen_set_label(l1);
            gen_jmp_im(tval);
            gen_set_label(l2);
            gen_eob(s);
        }
        break;
    case 0x130: /* wrmsr */
    case 0x132: /* rdmsr */
        if (s->cpl != 0) {
            gen_exception(s, EXCP0D_GPF, pc_start - s->cs_base);
        } else {
            gen_update_cc_op(s);
            gen_jmp_im(pc_start - s->cs_base);
            if (b & 2) {
                gen_helper_rdmsr(cpu_env);
            } else {
                gen_helper_wrmsr(cpu_env);
            }
        }
        break;
    case 0x131: /* rdtsc */
        gen_update_cc_op(s);
        gen_jmp_im(pc_start - s->cs_base);
        if (use_icount)
            gen_io_start();
        gen_helper_rdtsc(cpu_env);
        if (use_icount) {
            gen_io_end();
            gen_jmp(s, s->pc - s->cs_base);
        }
        break;
    case 0x133: /* rdpmc */
        gen_update_cc_op(s);
        gen_jmp_im(pc_start - s->cs_base);
        gen_helper_rdpmc(cpu_env);
        break;
    case 0x134: /* sysenter */
        /* For Intel SYSENTER is valid on 64-bit */
        if (CODE64(s) && env->cpuid_vendor1 != CPUID_VENDOR_INTEL_1)
            goto illegal_op;
        if (!s->pe) {
            gen_exception(s, EXCP0D_GPF, pc_start - s->cs_base);
        } else {
            gen_update_cc_op(s);
            gen_jmp_im(pc_start - s->cs_base);
            gen_helper_sysenter(cpu_env);
            gen_eob(s);
        }
        break;
    case 0x135: /* sysexit */
        /* For Intel SYSEXIT is valid on 64-bit */
        if (CODE64(s) && env->cpuid_vendor1 != CPUID_VENDOR_INTEL_1)
            goto illegal_op;
        if (!s->pe) {
            gen_exception(s, EXCP0D_GPF, pc_start - s->cs_base);
        } else {
            gen_update_cc_op(s);
            gen_jmp_im(pc_start - s->cs_base);
            gen_helper_sysexit(cpu_env, tcg_const_i32(dflag));
            gen_eob(s);
        }
        break;
#ifdef TARGET_X86_64
    case 0x105: /* syscall */
        /* XXX: is it usable in real mode ? */
        gen_update_cc_op(s);
        gen_jmp_im(pc_start - s->cs_base);
        gen_helper_syscall(cpu_env, tcg_const_i32(s->pc - pc_start));
        gen_eob(s);
        break;
    case 0x107: /* sysret */
        if (!s->pe) {
            gen_exception(s, EXCP0D_GPF, pc_start - s->cs_base);
        } else {
            gen_update_cc_op(s);
            gen_jmp_im(pc_start - s->cs_base);
            gen_helper_sysret(cpu_env, tcg_const_i32(s->dflag));
            /* condition codes are modified only in long mode */
            if (s->lma) {
                set_cc_op(s, CC_OP_EFLAGS);
            }
            gen_eob(s);
        }
        break;
#endif
    case 0x1a2: /* cpuid */
        gen_update_cc_op(s);
        gen_jmp_im(pc_start - s->cs_base);
        gen_helper_cpuid(cpu_env);
        break;
    case 0xf4: /* hlt */
        if (s->cpl != 0) {
            gen_exception(s, EXCP0D_GPF, pc_start - s->cs_base);
        } else {
            gen_update_cc_op(s);
            gen_jmp_im(pc_start - s->cs_base);
            gen_helper_hlt(cpu_env, tcg_const_i32(s->pc - pc_start));
            s->is_jmp = DISAS_TB_JUMP;
        }
        break;
    case 0x100:
        modrm = cpu_ldub_code(env, s->pc++);
        mod = (modrm >> 6) & 3;
        op = (modrm >> 3) & 7;
        switch(op) {
        case 0: /* sldt */
            if (!s->pe || s->vm86)
                goto illegal_op;
            gen_svm_check_intercept(s, pc_start, SVM_EXIT_LDTR_READ);
            tcg_gen_ld32u_tl(cpu_T[0], cpu_env, offsetof(CPUX86State,ldt.selector));
            ot = OT_WORD;
            if (mod == 3)
                ot += s->dflag;
            gen_ldst_modrm(env, s, modrm, ot, OR_TMP0, 1);
            break;
        case 2: /* lldt */
            if (!s->pe || s->vm86)
                goto illegal_op;
            if (s->cpl != 0) {
                gen_exception(s, EXCP0D_GPF, pc_start - s->cs_base);
            } else {
                gen_svm_check_intercept(s, pc_start, SVM_EXIT_LDTR_WRITE);
                gen_ldst_modrm(env, s, modrm, OT_WORD, OR_TMP0, 0);
                gen_jmp_im(pc_start - s->cs_base);
                tcg_gen_trunc_tl_i32(cpu_tmp2_i32, cpu_T[0]);
                gen_helper_lldt(cpu_env, cpu_tmp2_i32);
            }
            break;
        case 1: /* str */
            if (!s->pe || s->vm86)
                goto illegal_op;
            gen_svm_check_intercept(s, pc_start, SVM_EXIT_TR_READ);
            tcg_gen_ld32u_tl(cpu_T[0], cpu_env, offsetof(CPUX86State,tr.selector));
            ot = OT_WORD;
            if (mod == 3)
                ot += s->dflag;
            gen_ldst_modrm(env, s, modrm, ot, OR_TMP0, 1);
            break;
        case 3: /* ltr */
            if (!s->pe || s->vm86)
                goto illegal_op;
            if (s->cpl != 0) {
                gen_exception(s, EXCP0D_GPF, pc_start - s->cs_base);
            } else {
                gen_svm_check_intercept(s, pc_start, SVM_EXIT_TR_WRITE);
                gen_ldst_modrm(env, s, modrm, OT_WORD, OR_TMP0, 0);
                gen_jmp_im(pc_start - s->cs_base);
                tcg_gen_trunc_tl_i32(cpu_tmp2_i32, cpu_T[0]);
                gen_helper_ltr(cpu_env, cpu_tmp2_i32);
            }
            break;
        case 4: /* verr */
        case 5: /* verw */
            if (!s->pe || s->vm86)
                goto illegal_op;
            gen_ldst_modrm(env, s, modrm, OT_WORD, OR_TMP0, 0);
            gen_update_cc_op(s);
            if (op == 4) {
                gen_helper_verr(cpu_env, cpu_T[0]);
            } else {
                gen_helper_verw(cpu_env, cpu_T[0]);
            }
            set_cc_op(s, CC_OP_EFLAGS);
            break;
        default:
            goto illegal_op;
        }
        break;
    case 0x101:
        modrm = cpu_ldub_code(env, s->pc++);
        mod = (modrm >> 6) & 3;
        op = (modrm >> 3) & 7;
        rm = modrm & 7;
        switch(op) {
        case 0: /* sgdt */
            if (mod == 3)
                goto illegal_op;
            gen_svm_check_intercept(s, pc_start, SVM_EXIT_GDTR_READ);
            gen_lea_modrm(env, s, modrm, &reg_addr, &offset_addr);
            tcg_gen_ld32u_tl(cpu_T[0], cpu_env, offsetof(CPUX86State, gdt.limit));
            gen_op_st_T0_A0(OT_WORD + s->mem_index);
            gen_add_A0_im(s, 2);
            tcg_gen_ld_tl(cpu_T[0], cpu_env, offsetof(CPUX86State, gdt.base));
            if (!s->dflag)
                gen_op_andl_T0_im(0xffffff);
            gen_op_st_T0_A0(CODE64(s) + OT_LONG + s->mem_index);
            break;
        case 1:
            if (mod == 3) {
                switch (rm) {
                case 0: /* monitor */
                    if (!(s->cpuid_ext_features & CPUID_EXT_MONITOR) ||
                        s->cpl != 0)
                        goto illegal_op;
                    gen_update_cc_op(s);
                    gen_jmp_im(pc_start - s->cs_base);
#ifdef TARGET_X86_64
                    if (s->aflag == 2) {
                        gen_op_movq_A0_reg(R_EAX);
                    } else
#endif
                    {
                        gen_op_movl_A0_reg(R_EAX);
                        if (s->aflag == 0)
                            gen_op_andl_A0_ffff();
                    }
                    gen_add_A0_ds_seg(s);
                    gen_helper_monitor(cpu_env, cpu_A0);
                    break;
                case 1: /* mwait */
                    if (!(s->cpuid_ext_features & CPUID_EXT_MONITOR) ||
                        s->cpl != 0)
                        goto illegal_op;
                    gen_update_cc_op(s);
                    gen_jmp_im(pc_start - s->cs_base);
                    gen_helper_mwait(cpu_env, tcg_const_i32(s->pc - pc_start));
                    gen_eob(s);
                    break;
                case 2: /* clac */
                    if (!(s->cpuid_7_0_ebx_features & CPUID_7_0_EBX_SMAP) ||
                        s->cpl != 0) {
                        goto illegal_op;
                    }
                    gen_helper_clac(cpu_env);
                    gen_jmp_im(s->pc - s->cs_base);
                    gen_eob(s);
                    break;
                case 3: /* stac */
                    if (!(s->cpuid_7_0_ebx_features & CPUID_7_0_EBX_SMAP) ||
                        s->cpl != 0) {
                        goto illegal_op;
                    }
                    gen_helper_stac(cpu_env);
                    gen_jmp_im(s->pc - s->cs_base);
                    gen_eob(s);
                    break;
                default:
                    goto illegal_op;
                }
            } else { /* sidt */
                gen_svm_check_intercept(s, pc_start, SVM_EXIT_IDTR_READ);
                gen_lea_modrm(env, s, modrm, &reg_addr, &offset_addr);
                tcg_gen_ld32u_tl(cpu_T[0], cpu_env, offsetof(CPUX86State, idt.limit));
                gen_op_st_T0_A0(OT_WORD + s->mem_index);
                gen_add_A0_im(s, 2);
                tcg_gen_ld_tl(cpu_T[0], cpu_env, offsetof(CPUX86State, idt.base));
                if (!s->dflag)
                    gen_op_andl_T0_im(0xffffff);
                gen_op_st_T0_A0(CODE64(s) + OT_LONG + s->mem_index);
            }
            break;
        case 2: /* lgdt */
        case 3: /* lidt */
            if (mod == 3) {
                gen_update_cc_op(s);
                gen_jmp_im(pc_start - s->cs_base);
                switch(rm) {
                case 0: /* VMRUN */
                    if (!(s->flags & HF_SVME_MASK) || !s->pe)
                        goto illegal_op;
                    if (s->cpl != 0) {
                        gen_exception(s, EXCP0D_GPF, pc_start - s->cs_base);
                        break;
                    } else {
                        gen_helper_vmrun(cpu_env, tcg_const_i32(s->aflag),
                                         tcg_const_i32(s->pc - pc_start));
                        tcg_gen_exit_tb(0);
                        s->is_jmp = DISAS_TB_JUMP;
                    }
                    break;
                case 1: /* VMMCALL */
                    if (!(s->flags & HF_SVME_MASK))
                        goto illegal_op;
                    gen_helper_vmmcall(cpu_env);
                    break;
                case 2: /* VMLOAD */
                    if (!(s->flags & HF_SVME_MASK) || !s->pe)
                        goto illegal_op;
                    if (s->cpl != 0) {
                        gen_exception(s, EXCP0D_GPF, pc_start - s->cs_base);
                        break;
                    } else {
                        gen_helper_vmload(cpu_env, tcg_const_i32(s->aflag));
                    }
                    break;
                case 3: /* VMSAVE */
                    if (!(s->flags & HF_SVME_MASK) || !s->pe)
                        goto illegal_op;
                    if (s->cpl != 0) {
                        gen_exception(s, EXCP0D_GPF, pc_start - s->cs_base);
                        break;
                    } else {
                        gen_helper_vmsave(cpu_env, tcg_const_i32(s->aflag));
                    }
                    break;
                case 4: /* STGI */
                    if ((!(s->flags & HF_SVME_MASK) &&
                         !(s->cpuid_ext3_features & CPUID_EXT3_SKINIT)) || 
                        !s->pe)
                        goto illegal_op;
                    if (s->cpl != 0) {
                        gen_exception(s, EXCP0D_GPF, pc_start - s->cs_base);
                        break;
                    } else {
                        gen_helper_stgi(cpu_env);
                    }
                    break;
                case 5: /* CLGI */
                    if (!(s->flags & HF_SVME_MASK) || !s->pe)
                        goto illegal_op;
                    if (s->cpl != 0) {
                        gen_exception(s, EXCP0D_GPF, pc_start - s->cs_base);
                        break;
                    } else {
                        gen_helper_clgi(cpu_env);
                    }
                    break;
                case 6: /* SKINIT */
                    if ((!(s->flags & HF_SVME_MASK) && 
                         !(s->cpuid_ext3_features & CPUID_EXT3_SKINIT)) || 
                        !s->pe)
                        goto illegal_op;
                    gen_helper_skinit(cpu_env);
                    break;
                case 7: /* INVLPGA */
                    if (!(s->flags & HF_SVME_MASK) || !s->pe)
                        goto illegal_op;
                    if (s->cpl != 0) {
                        gen_exception(s, EXCP0D_GPF, pc_start - s->cs_base);
                        break;
                    } else {
                        gen_helper_invlpga(cpu_env, tcg_const_i32(s->aflag));
                    }
                    break;
                default:
                    goto illegal_op;
                }
            } else if (s->cpl != 0) {
                gen_exception(s, EXCP0D_GPF, pc_start - s->cs_base);
            } else {
                gen_svm_check_intercept(s, pc_start,
                                        op==2 ? SVM_EXIT_GDTR_WRITE : SVM_EXIT_IDTR_WRITE);
                gen_lea_modrm(env, s, modrm, &reg_addr, &offset_addr);
                gen_op_ld_T1_A0(OT_WORD + s->mem_index);
                gen_add_A0_im(s, 2);
                gen_op_ld_T0_A0(CODE64(s) + OT_LONG + s->mem_index);
                if (!s->dflag)
                    gen_op_andl_T0_im(0xffffff);
                if (op == 2) {
                    tcg_gen_st_tl(cpu_T[0], cpu_env, offsetof(CPUX86State,gdt.base));
                    tcg_gen_st32_tl(cpu_T[1], cpu_env, offsetof(CPUX86State,gdt.limit));
                } else {
                    tcg_gen_st_tl(cpu_T[0], cpu_env, offsetof(CPUX86State,idt.base));
                    tcg_gen_st32_tl(cpu_T[1], cpu_env, offsetof(CPUX86State,idt.limit));
                }
            }
            break;
        case 4: /* smsw */
            gen_svm_check_intercept(s, pc_start, SVM_EXIT_READ_CR0);
#if defined TARGET_X86_64 && defined HOST_WORDS_BIGENDIAN
            tcg_gen_ld32u_tl(cpu_T[0], cpu_env, offsetof(CPUX86State,cr[0]) + 4);
#else
            tcg_gen_ld32u_tl(cpu_T[0], cpu_env, offsetof(CPUX86State,cr[0]));
#endif
            gen_ldst_modrm(env, s, modrm, OT_WORD, OR_TMP0, 1);
            break;
        case 6: /* lmsw */
            if (s->cpl != 0) {
                gen_exception(s, EXCP0D_GPF, pc_start - s->cs_base);
            } else {
                gen_svm_check_intercept(s, pc_start, SVM_EXIT_WRITE_CR0);
                gen_ldst_modrm(env, s, modrm, OT_WORD, OR_TMP0, 0);
                gen_helper_lmsw(cpu_env, cpu_T[0]);
                gen_jmp_im(s->pc - s->cs_base);
                gen_eob(s);
            }
            break;
        case 7:
            if (mod != 3) { /* invlpg */
                if (s->cpl != 0) {
                    gen_exception(s, EXCP0D_GPF, pc_start - s->cs_base);
                } else {
                    gen_update_cc_op(s);
                    gen_jmp_im(pc_start - s->cs_base);
                    gen_lea_modrm(env, s, modrm, &reg_addr, &offset_addr);
                    gen_helper_invlpg(cpu_env, cpu_A0);
                    gen_jmp_im(s->pc - s->cs_base);
                    gen_eob(s);
                }
            } else {
                switch (rm) {
                case 0: /* swapgs */
#ifdef TARGET_X86_64
                    if (CODE64(s)) {
                        if (s->cpl != 0) {
                            gen_exception(s, EXCP0D_GPF, pc_start - s->cs_base);
                        } else {
                            tcg_gen_ld_tl(cpu_T[0], cpu_env,
                                offsetof(CPUX86State,segs[R_GS].base));
                            tcg_gen_ld_tl(cpu_T[1], cpu_env,
                                offsetof(CPUX86State,kernelgsbase));
                            tcg_gen_st_tl(cpu_T[1], cpu_env,
                                offsetof(CPUX86State,segs[R_GS].base));
                            tcg_gen_st_tl(cpu_T[0], cpu_env,
                                offsetof(CPUX86State,kernelgsbase));
                        }
                    } else
#endif
                    {
                        goto illegal_op;
                    }
                    break;
                case 1: /* rdtscp */
                    if (!(s->cpuid_ext2_features & CPUID_EXT2_RDTSCP))
                        goto illegal_op;
                    gen_update_cc_op(s);
                    gen_jmp_im(pc_start - s->cs_base);
                    if (use_icount)
                        gen_io_start();
                    gen_helper_rdtscp(cpu_env);
                    if (use_icount) {
                        gen_io_end();
                        gen_jmp(s, s->pc - s->cs_base);
                    }
                    break;
                default:
                    goto illegal_op;
                }
            }
            break;
        default:
            goto illegal_op;
        }
        break;
    case 0x108: /* invd */
    case 0x109: /* wbinvd */
        if (s->cpl != 0) {
            gen_exception(s, EXCP0D_GPF, pc_start - s->cs_base);
        } else {
            gen_svm_check_intercept(s, pc_start, (b & 2) ? SVM_EXIT_INVD : SVM_EXIT_WBINVD);
            /* nothing to do */
        }
        break;
    case 0x63: /* arpl or movslS (x86_64) */
#ifdef TARGET_X86_64
        if (CODE64(s)) {
            int d_ot;
            /* d_ot is the size of destination */
            d_ot = dflag + OT_WORD;

            modrm = cpu_ldub_code(env, s->pc++);
            reg = ((modrm >> 3) & 7) | rex_r;
            mod = (modrm >> 6) & 3;
            rm = (modrm & 7) | REX_B(s);

            if (mod == 3) {
                gen_op_mov_TN_reg(OT_LONG, 0, rm);
                /* sign extend */
                if (d_ot == OT_QUAD)
                    tcg_gen_ext32s_tl(cpu_T[0], cpu_T[0]);
                gen_op_mov_reg_T0(d_ot, reg);
            } else {
                gen_lea_modrm(env, s, modrm, &reg_addr, &offset_addr);
                if (d_ot == OT_QUAD) {
                    gen_op_lds_T0_A0(OT_LONG + s->mem_index);
                } else {
                    gen_op_ld_T0_A0(OT_LONG + s->mem_index);
                }
                gen_op_mov_reg_T0(d_ot, reg);
            }
        } else
#endif
        {
            int label1;
            TCGv t0, t1, t2, a0;

            if (!s->pe || s->vm86)
                goto illegal_op;
            t0 = tcg_temp_local_new();
            t1 = tcg_temp_local_new();
            t2 = tcg_temp_local_new();
            ot = OT_WORD;
            modrm = cpu_ldub_code(env, s->pc++);
            reg = (modrm >> 3) & 7;
            mod = (modrm >> 6) & 3;
            rm = modrm & 7;
            if (mod != 3) {
                gen_lea_modrm(env, s, modrm, &reg_addr, &offset_addr);
                gen_op_ld_v(ot + s->mem_index, t0, cpu_A0);
                a0 = tcg_temp_local_new();
                tcg_gen_mov_tl(a0, cpu_A0);
            } else {
                gen_op_mov_v_reg(ot, t0, rm);
                TCGV_UNUSED(a0);
            }
            gen_op_mov_v_reg(ot, t1, reg);
            tcg_gen_andi_tl(cpu_tmp0, t0, 3);
            tcg_gen_andi_tl(t1, t1, 3);
            tcg_gen_movi_tl(t2, 0);
            label1 = gen_new_label();
            tcg_gen_brcond_tl(TCG_COND_GE, cpu_tmp0, t1, label1);
            tcg_gen_andi_tl(t0, t0, ~3);
            tcg_gen_or_tl(t0, t0, t1);
            tcg_gen_movi_tl(t2, CC_Z);
            gen_set_label(label1);
            if (mod != 3) {
                gen_op_st_v(ot + s->mem_index, t0, a0);
                tcg_temp_free(a0);
           } else {
                gen_op_mov_reg_v(ot, rm, t0);
            }
            gen_compute_eflags(s);
            tcg_gen_andi_tl(cpu_cc_src, cpu_cc_src, ~CC_Z);
            tcg_gen_or_tl(cpu_cc_src, cpu_cc_src, t2);
            tcg_temp_free(t0);
            tcg_temp_free(t1);
            tcg_temp_free(t2);
        }
        break;
    case 0x102: /* lar */
    case 0x103: /* lsl */
        {
            int label1;
            TCGv t0;
            if (!s->pe || s->vm86)
                goto illegal_op;
            ot = dflag ? OT_LONG : OT_WORD;
            modrm = cpu_ldub_code(env, s->pc++);
            reg = ((modrm >> 3) & 7) | rex_r;
            gen_ldst_modrm(env, s, modrm, OT_WORD, OR_TMP0, 0);
            t0 = tcg_temp_local_new();
            gen_update_cc_op(s);
            if (b == 0x102) {
                gen_helper_lar(t0, cpu_env, cpu_T[0]);
            } else {
                gen_helper_lsl(t0, cpu_env, cpu_T[0]);
            }
            tcg_gen_andi_tl(cpu_tmp0, cpu_cc_src, CC_Z);
            label1 = gen_new_label();
            tcg_gen_brcondi_tl(TCG_COND_EQ, cpu_tmp0, 0, label1);
            gen_op_mov_reg_v(ot, reg, t0);
            gen_set_label(label1);
            set_cc_op(s, CC_OP_EFLAGS);
            tcg_temp_free(t0);
        }
        break;
    case 0x118:
        modrm = cpu_ldub_code(env, s->pc++);
        mod = (modrm >> 6) & 3;
        op = (modrm >> 3) & 7;
        switch(op) {
        case 0: /* prefetchnta */
        case 1: /* prefetchnt0 */
        case 2: /* prefetchnt0 */
        case 3: /* prefetchnt0 */
            if (mod == 3)
                goto illegal_op;
            gen_lea_modrm(env, s, modrm, &reg_addr, &offset_addr);
            /* nothing more to do */
            break;
        default: /* nop (multi byte) */
            gen_nop_modrm(env, s, modrm);
            break;
        }
        break;
    case 0x119 ... 0x11f: /* nop (multi byte) */
        modrm = cpu_ldub_code(env, s->pc++);
        gen_nop_modrm(env, s, modrm);
        break;
    case 0x120: /* mov reg, crN */
    case 0x122: /* mov crN, reg */
        if (s->cpl != 0) {
            gen_exception(s, EXCP0D_GPF, pc_start - s->cs_base);
        } else {
            modrm = cpu_ldub_code(env, s->pc++);
            /* Ignore the mod bits (assume (modrm&0xc0)==0xc0).
             * AMD documentation (24594.pdf) and testing of
             * intel 386 and 486 processors all show that the mod bits
             * are assumed to be 1's, regardless of actual values.
             */
            rm = (modrm & 7) | REX_B(s);
            reg = ((modrm >> 3) & 7) | rex_r;
            if (CODE64(s))
                ot = OT_QUAD;
            else
                ot = OT_LONG;
            if ((prefixes & PREFIX_LOCK) && (reg == 0) &&
                (s->cpuid_ext3_features & CPUID_EXT3_CR8LEG)) {
                reg = 8;
            }
            switch(reg) {
            case 0:
            case 2:
            case 3:
            case 4:
            case 8:
                gen_update_cc_op(s);
                gen_jmp_im(pc_start - s->cs_base);
                if (b & 2) {
                    gen_op_mov_TN_reg(ot, 0, rm);
                    gen_helper_write_crN(cpu_env, tcg_const_i32(reg),
                                         cpu_T[0]);
                    gen_jmp_im(s->pc - s->cs_base);
                    gen_eob(s);
                } else {
                    gen_helper_read_crN(cpu_T[0], cpu_env, tcg_const_i32(reg));
                    gen_op_mov_reg_T0(ot, rm);
                }
                break;
            default:
                goto illegal_op;
            }
        }
        break;
    case 0x121: /* mov reg, drN */
    case 0x123: /* mov drN, reg */
        if (s->cpl != 0) {
            gen_exception(s, EXCP0D_GPF, pc_start - s->cs_base);
        } else {
            modrm = cpu_ldub_code(env, s->pc++);
            /* Ignore the mod bits (assume (modrm&0xc0)==0xc0).
             * AMD documentation (24594.pdf) and testing of
             * intel 386 and 486 processors all show that the mod bits
             * are assumed to be 1's, regardless of actual values.
             */
            rm = (modrm & 7) | REX_B(s);
            reg = ((modrm >> 3) & 7) | rex_r;
            if (CODE64(s))
                ot = OT_QUAD;
            else
                ot = OT_LONG;
            /* XXX: do it dynamically with CR4.DE bit */
            if (reg == 4 || reg == 5 || reg >= 8)
                goto illegal_op;
            if (b & 2) {
                gen_svm_check_intercept(s, pc_start, SVM_EXIT_WRITE_DR0 + reg);
                gen_op_mov_TN_reg(ot, 0, rm);
                gen_helper_movl_drN_T0(cpu_env, tcg_const_i32(reg), cpu_T[0]);
                gen_jmp_im(s->pc - s->cs_base);
                gen_eob(s);
            } else {
                gen_svm_check_intercept(s, pc_start, SVM_EXIT_READ_DR0 + reg);
                tcg_gen_ld_tl(cpu_T[0], cpu_env, offsetof(CPUX86State,dr[reg]));
                gen_op_mov_reg_T0(ot, rm);
            }
        }
        break;
    case 0x106: /* clts */
        if (s->cpl != 0) {
            gen_exception(s, EXCP0D_GPF, pc_start - s->cs_base);
        } else {
            gen_svm_check_intercept(s, pc_start, SVM_EXIT_WRITE_CR0);
            gen_helper_clts(cpu_env);
            /* abort block because static cpu state changed */
            gen_jmp_im(s->pc - s->cs_base);
            gen_eob(s);
        }
        break;
    /* MMX/3DNow!/SSE/SSE2/SSE3/SSSE3/SSE4 support */
    case 0x1c3: /* MOVNTI reg, mem */
        if (!(s->cpuid_features & CPUID_SSE2))
            goto illegal_op;
        ot = s->dflag == 2 ? OT_QUAD : OT_LONG;
        modrm = cpu_ldub_code(env, s->pc++);
        mod = (modrm >> 6) & 3;
        if (mod == 3)
            goto illegal_op;
        reg = ((modrm >> 3) & 7) | rex_r;
        /* generate a generic store */
        gen_ldst_modrm(env, s, modrm, ot, reg, 1);
        break;
    case 0x1ae:
        modrm = cpu_ldub_code(env, s->pc++);
        mod = (modrm >> 6) & 3;
        op = (modrm >> 3) & 7;
        switch(op) {
        case 0: /* fxsave */
            if (mod == 3 || !(s->cpuid_features & CPUID_FXSR) ||
                (s->prefix & PREFIX_LOCK))
                goto illegal_op;
            if ((s->flags & HF_EM_MASK) || (s->flags & HF_TS_MASK)) {
                gen_exception(s, EXCP07_PREX, pc_start - s->cs_base);
                break;
            }
            gen_lea_modrm(env, s, modrm, &reg_addr, &offset_addr);
            gen_update_cc_op(s);
            gen_jmp_im(pc_start - s->cs_base);
            gen_helper_fxsave(cpu_env, cpu_A0, tcg_const_i32((s->dflag == 2)));
            break;
        case 1: /* fxrstor */
            if (mod == 3 || !(s->cpuid_features & CPUID_FXSR) ||
                (s->prefix & PREFIX_LOCK))
                goto illegal_op;
            if ((s->flags & HF_EM_MASK) || (s->flags & HF_TS_MASK)) {
                gen_exception(s, EXCP07_PREX, pc_start - s->cs_base);
                break;
            }
            gen_lea_modrm(env, s, modrm, &reg_addr, &offset_addr);
            gen_update_cc_op(s);
            gen_jmp_im(pc_start - s->cs_base);
            gen_helper_fxrstor(cpu_env, cpu_A0,
                               tcg_const_i32((s->dflag == 2)));
            break;
        case 2: /* ldmxcsr */
        case 3: /* stmxcsr */
            if (s->flags & HF_TS_MASK) {
                gen_exception(s, EXCP07_PREX, pc_start - s->cs_base);
                break;
            }
            if ((s->flags & HF_EM_MASK) || !(s->flags & HF_OSFXSR_MASK) ||
                mod == 3)
                goto illegal_op;
            gen_lea_modrm(env, s, modrm, &reg_addr, &offset_addr);
            if (op == 2) {
                gen_op_ld_T0_A0(OT_LONG + s->mem_index);
                tcg_gen_trunc_tl_i32(cpu_tmp2_i32, cpu_T[0]);
                gen_helper_ldmxcsr(cpu_env, cpu_tmp2_i32);
            } else {
                tcg_gen_ld32u_tl(cpu_T[0], cpu_env, offsetof(CPUX86State, mxcsr));
                gen_op_st_T0_A0(OT_LONG + s->mem_index);
            }
            break;
        case 5: /* lfence */
        case 6: /* mfence */
            if ((modrm & 0xc7) != 0xc0 || !(s->cpuid_features & CPUID_SSE2))
                goto illegal_op;
            break;
        case 7: /* sfence / clflush */
            if ((modrm & 0xc7) == 0xc0) {
                /* sfence */
                /* XXX: also check for cpuid_ext2_features & CPUID_EXT2_EMMX */
                if (!(s->cpuid_features & CPUID_SSE))
                    goto illegal_op;
            } else {
                /* clflush */
                if (!(s->cpuid_features & CPUID_CLFLUSH))
                    goto illegal_op;
                gen_lea_modrm(env, s, modrm, &reg_addr, &offset_addr);
            }
            break;
        default:
            goto illegal_op;
        }
        break;
    case 0x10d: /* 3DNow! prefetch(w) */
        modrm = cpu_ldub_code(env, s->pc++);
        mod = (modrm >> 6) & 3;
        if (mod == 3)
            goto illegal_op;
        gen_lea_modrm(env, s, modrm, &reg_addr, &offset_addr);
        /* ignore for now */
        break;
    case 0x1aa: /* rsm */
        gen_svm_check_intercept(s, pc_start, SVM_EXIT_RSM);
        if (!(s->flags & HF_SMM_MASK))
            goto illegal_op;
        gen_update_cc_op(s);
        gen_jmp_im(s->pc - s->cs_base);
        gen_helper_rsm(cpu_env);
        gen_eob(s);
        break;
    case 0x1b8: /* SSE4.2 popcnt */
        if ((prefixes & (PREFIX_REPZ | PREFIX_LOCK | PREFIX_REPNZ)) !=
             PREFIX_REPZ)
            goto illegal_op;
        if (!(s->cpuid_ext_features & CPUID_EXT_POPCNT))
            goto illegal_op;

        modrm = cpu_ldub_code(env, s->pc++);
        reg = ((modrm >> 3) & 7) | rex_r;

        if (s->prefix & PREFIX_DATA)
            ot = OT_WORD;
        else if (s->dflag != 2)
            ot = OT_LONG;
        else
            ot = OT_QUAD;

        gen_ldst_modrm(env, s, modrm, ot, OR_TMP0, 0);
        gen_helper_popcnt(cpu_T[0], cpu_env, cpu_T[0], tcg_const_i32(ot));
        gen_op_mov_reg_T0(ot, reg);

        set_cc_op(s, CC_OP_EFLAGS);
        break;
    case 0x10e ... 0x10f:
        /* 3DNow! instructions, ignore prefixes */
        s->prefix &= ~(PREFIX_REPZ | PREFIX_REPNZ | PREFIX_DATA);
    case 0x110 ... 0x117:
    case 0x128 ... 0x12f:
    case 0x138 ... 0x13a:
    case 0x150 ... 0x179:
    case 0x17c ... 0x17f:
    case 0x1c2:
    case 0x1c4 ... 0x1c6:
    case 0x1d0 ... 0x1fe:
        gen_sse(env, s, b, pc_start, rex_r);
        break;
    default:
        goto illegal_op;
    }
    /* lock generation */
    if (s->prefix & PREFIX_LOCK)
        gen_helper_unlock();
    return s->pc;
 illegal_op:
    if (s->prefix & PREFIX_LOCK)
        gen_helper_unlock();
    /* XXX: ensure that no lock was generated */
    gen_exception(s, EXCP06_ILLOP, pc_start - s->cs_base);
    return s->pc;
}

void optimize_flags_init(void)
{
    cpu_env = tcg_global_reg_new_ptr(TCG_AREG0, "env");
    cpu_cc_op = tcg_global_mem_new_i32(TCG_AREG0,
                                       offsetof(CPUX86State, cc_op), "cc_op");
    cpu_cc_dst = tcg_global_mem_new(TCG_AREG0, offsetof(CPUX86State, cc_dst),
                                    "cc_dst");
    cpu_cc_src = tcg_global_mem_new(TCG_AREG0, offsetof(CPUX86State, cc_src),
                                    "cc_src");

#ifdef TARGET_X86_64
    cpu_regs[R_EAX] = tcg_global_mem_new_i64(TCG_AREG0,
                                             offsetof(CPUX86State, regs[R_EAX]), "rax");
    cpu_regs[R_ECX] = tcg_global_mem_new_i64(TCG_AREG0,
                                             offsetof(CPUX86State, regs[R_ECX]), "rcx");
    cpu_regs[R_EDX] = tcg_global_mem_new_i64(TCG_AREG0,
                                             offsetof(CPUX86State, regs[R_EDX]), "rdx");
    cpu_regs[R_EBX] = tcg_global_mem_new_i64(TCG_AREG0,
                                             offsetof(CPUX86State, regs[R_EBX]), "rbx");
    cpu_regs[R_ESP] = tcg_global_mem_new_i64(TCG_AREG0,
                                             offsetof(CPUX86State, regs[R_ESP]), "rsp");
    cpu_regs[R_EBP] = tcg_global_mem_new_i64(TCG_AREG0,
                                             offsetof(CPUX86State, regs[R_EBP]), "rbp");
    cpu_regs[R_ESI] = tcg_global_mem_new_i64(TCG_AREG0,
                                             offsetof(CPUX86State, regs[R_ESI]), "rsi");
    cpu_regs[R_EDI] = tcg_global_mem_new_i64(TCG_AREG0,
                                             offsetof(CPUX86State, regs[R_EDI]), "rdi");
    cpu_regs[8] = tcg_global_mem_new_i64(TCG_AREG0,
                                         offsetof(CPUX86State, regs[8]), "r8");
    cpu_regs[9] = tcg_global_mem_new_i64(TCG_AREG0,
                                          offsetof(CPUX86State, regs[9]), "r9");
    cpu_regs[10] = tcg_global_mem_new_i64(TCG_AREG0,
                                          offsetof(CPUX86State, regs[10]), "r10");
    cpu_regs[11] = tcg_global_mem_new_i64(TCG_AREG0,
                                          offsetof(CPUX86State, regs[11]), "r11");
    cpu_regs[12] = tcg_global_mem_new_i64(TCG_AREG0,
                                          offsetof(CPUX86State, regs[12]), "r12");
    cpu_regs[13] = tcg_global_mem_new_i64(TCG_AREG0,
                                          offsetof(CPUX86State, regs[13]), "r13");
    cpu_regs[14] = tcg_global_mem_new_i64(TCG_AREG0,
                                          offsetof(CPUX86State, regs[14]), "r14");
    cpu_regs[15] = tcg_global_mem_new_i64(TCG_AREG0,
                                          offsetof(CPUX86State, regs[15]), "r15");
#else
    cpu_regs[R_EAX] = tcg_global_mem_new_i32(TCG_AREG0,
                                             offsetof(CPUX86State, regs[R_EAX]), "eax");
    cpu_regs[R_ECX] = tcg_global_mem_new_i32(TCG_AREG0,
                                             offsetof(CPUX86State, regs[R_ECX]), "ecx");
    cpu_regs[R_EDX] = tcg_global_mem_new_i32(TCG_AREG0,
                                             offsetof(CPUX86State, regs[R_EDX]), "edx");
    cpu_regs[R_EBX] = tcg_global_mem_new_i32(TCG_AREG0,
                                             offsetof(CPUX86State, regs[R_EBX]), "ebx");
    cpu_regs[R_ESP] = tcg_global_mem_new_i32(TCG_AREG0,
                                             offsetof(CPUX86State, regs[R_ESP]), "esp");
    cpu_regs[R_EBP] = tcg_global_mem_new_i32(TCG_AREG0,
                                             offsetof(CPUX86State, regs[R_EBP]), "ebp");
    cpu_regs[R_ESI] = tcg_global_mem_new_i32(TCG_AREG0,
                                             offsetof(CPUX86State, regs[R_ESI]), "esi");
    cpu_regs[R_EDI] = tcg_global_mem_new_i32(TCG_AREG0,
                                             offsetof(CPUX86State, regs[R_EDI]), "edi");
#endif

    /* register helpers */
#define GEN_HELPER 2
#include "helper.h"
}

/* generate intermediate code in gen_opc_buf and gen_opparam_buf for
   basic block 'tb'. If search_pc is TRUE, also generate PC
   information for each intermediate instruction. */
static inline void gen_intermediate_code_internal(CPUX86State *env,
                                                  TranslationBlock *tb,
                                                  int search_pc)
{
    DisasContext dc1, *dc = &dc1;
    target_ulong pc_ptr;
    uint16_t *gen_opc_end;
    CPUBreakpoint *bp;
    int j, lj;
    uint64_t flags;
    target_ulong pc_start;
    target_ulong cs_base;
    int num_insns;
    int max_insns;

    /* generate intermediate code */
    pc_start = tb->pc;
    cs_base = tb->cs_base;
    flags = tb->flags;

    dc->pe = (flags >> HF_PE_SHIFT) & 1;
    dc->code32 = (flags >> HF_CS32_SHIFT) & 1;
    dc->ss32 = (flags >> HF_SS32_SHIFT) & 1;
    dc->addseg = (flags >> HF_ADDSEG_SHIFT) & 1;
    dc->f_st = 0;
    dc->vm86 = (flags >> VM_SHIFT) & 1;
    dc->cpl = (flags >> HF_CPL_SHIFT) & 3;
    dc->iopl = (flags >> IOPL_SHIFT) & 3;
    dc->tf = (flags >> TF_SHIFT) & 1;
    dc->singlestep_enabled = env->singlestep_enabled;
    dc->cc_op = CC_OP_DYNAMIC;
    dc->cc_op_dirty = false;
    dc->cs_base = cs_base;
    dc->tb = tb;
    dc->popl_esp_hack = 0;
    /* select memory access functions */
    dc->mem_index = 0;
    if (flags & HF_SOFTMMU_MASK) {
        dc->mem_index = (cpu_mmu_index(env) + 1) << 2;
    }
    dc->cpuid_features = env->cpuid_features;
    dc->cpuid_ext_features = env->cpuid_ext_features;
    dc->cpuid_ext2_features = env->cpuid_ext2_features;
    dc->cpuid_ext3_features = env->cpuid_ext3_features;
    dc->cpuid_7_0_ebx_features = env->cpuid_7_0_ebx_features;
#ifdef TARGET_X86_64
    dc->lma = (flags >> HF_LMA_SHIFT) & 1;
    dc->code64 = (flags >> HF_CS64_SHIFT) & 1;
#endif
    dc->flags = flags;
    dc->jmp_opt = !(dc->tf || env->singlestep_enabled ||
                    (flags & HF_INHIBIT_IRQ_MASK)
#ifndef CONFIG_SOFTMMU
                    || (flags & HF_SOFTMMU_MASK)
#endif
                    );
#if 0
    /* check addseg logic */
    if (!dc->addseg && (dc->vm86 || !dc->pe || !dc->code32))
        printf("ERROR addseg\n");
#endif

    cpu_T[0] = tcg_temp_new();
    cpu_T[1] = tcg_temp_new();
    cpu_A0 = tcg_temp_new();

    cpu_tmp0 = tcg_temp_new();
    cpu_tmp1_i64 = tcg_temp_new_i64();
    cpu_tmp2_i32 = tcg_temp_new_i32();
    cpu_tmp3_i32 = tcg_temp_new_i32();
    cpu_tmp4 = tcg_temp_new();
    cpu_tmp5 = tcg_temp_new();
    cpu_ptr0 = tcg_temp_new_ptr();
    cpu_ptr1 = tcg_temp_new_ptr();
    cpu_cc_srcT = tcg_temp_local_new();

    gen_opc_end = tcg_ctx.gen_opc_buf + OPC_MAX_SIZE;

    dc->is_jmp = DISAS_NEXT;
    pc_ptr = pc_start;
    lj = -1;
    num_insns = 0;
    max_insns = tb->cflags & CF_COUNT_MASK;
    if (max_insns == 0)
        max_insns = CF_COUNT_MASK;

    gen_icount_start();
    for(;;) {
        if (unlikely(!QTAILQ_EMPTY(&env->breakpoints))) {
            QTAILQ_FOREACH(bp, &env->breakpoints, entry) {
                if (bp->pc == pc_ptr &&
                    !((bp->flags & BP_CPU) && (tb->flags & HF_RF_MASK))) {
                    gen_debug(dc, pc_ptr - dc->cs_base);
                    break;
                }
            }
        }
        if (search_pc) {
            j = tcg_ctx.gen_opc_ptr - tcg_ctx.gen_opc_buf;
            if (lj < j) {
                lj++;
                while (lj < j)
                    tcg_ctx.gen_opc_instr_start[lj++] = 0;
            }
            tcg_ctx.gen_opc_pc[lj] = pc_ptr;
            gen_opc_cc_op[lj] = dc->cc_op;
            tcg_ctx.gen_opc_instr_start[lj] = 1;
            tcg_ctx.gen_opc_icount[lj] = num_insns;
        }
        if (num_insns + 1 == max_insns && (tb->cflags & CF_LAST_IO))
            gen_io_start();

        pc_ptr = disas_insn(env, dc, pc_ptr);
        num_insns++;
        /* stop translation if indicated */
        if (dc->is_jmp)
            break;
        /* if single step mode, we generate only one instruction and
           generate an exception */
        /* if irq were inhibited with HF_INHIBIT_IRQ_MASK, we clear
           the flag and abort the translation to give the irqs a
           change to be happen */
        if (dc->tf || dc->singlestep_enabled ||
            (flags & HF_INHIBIT_IRQ_MASK)) {
            gen_jmp_im(pc_ptr - dc->cs_base);
            gen_eob(dc);
            break;
        }
        /* if too long translation, stop generation too */
        if (tcg_ctx.gen_opc_ptr >= gen_opc_end ||
            (pc_ptr - pc_start) >= (TARGET_PAGE_SIZE - 32) ||
            num_insns >= max_insns) {
            gen_jmp_im(pc_ptr - dc->cs_base);
            gen_eob(dc);
            break;
        }
        if (singlestep) {
            gen_jmp_im(pc_ptr - dc->cs_base);
            gen_eob(dc);
            break;
        }
    }
    if (tb->cflags & CF_LAST_IO)
        gen_io_end();
    gen_icount_end(tb, num_insns);
    *tcg_ctx.gen_opc_ptr = INDEX_op_end;
    /* we don't forget to fill the last values */
    if (search_pc) {
        j = tcg_ctx.gen_opc_ptr - tcg_ctx.gen_opc_buf;
        lj++;
        while (lj <= j)
            tcg_ctx.gen_opc_instr_start[lj++] = 0;
    }

#ifdef DEBUG_DISAS
    if (qemu_loglevel_mask(CPU_LOG_TB_IN_ASM)) {
        int disas_flags;
        qemu_log("----------------\n");
        qemu_log("IN: %s\n", lookup_symbol(pc_start));
#ifdef TARGET_X86_64
        if (dc->code64)
            disas_flags = 2;
        else
#endif
            disas_flags = !dc->code32;
        log_target_disas(env, pc_start, pc_ptr - pc_start, disas_flags);
        qemu_log("\n");
    }
#endif

    if (!search_pc) {
        tb->size = pc_ptr - pc_start;
        tb->icount = num_insns;
    }
}

void gen_intermediate_code(CPUX86State *env, TranslationBlock *tb)
{
    gen_intermediate_code_internal(env, tb, 0);
}

void gen_intermediate_code_pc(CPUX86State *env, TranslationBlock *tb)
{
    gen_intermediate_code_internal(env, tb, 1);
}

void restore_state_to_opc(CPUX86State *env, TranslationBlock *tb, int pc_pos)
{
    int cc_op;
#ifdef DEBUG_DISAS
    if (qemu_loglevel_mask(CPU_LOG_TB_OP)) {
        int i;
        qemu_log("RESTORE:\n");
        for(i = 0;i <= pc_pos; i++) {
            if (tcg_ctx.gen_opc_instr_start[i]) {
                qemu_log("0x%04x: " TARGET_FMT_lx "\n", i,
                        tcg_ctx.gen_opc_pc[i]);
            }
        }
        qemu_log("pc_pos=0x%x eip=" TARGET_FMT_lx " cs_base=%x\n",
                pc_pos, tcg_ctx.gen_opc_pc[pc_pos] - tb->cs_base,
                (uint32_t)tb->cs_base);
    }
#endif
    env->eip = tcg_ctx.gen_opc_pc[pc_pos] - tb->cs_base;
    cc_op = gen_opc_cc_op[pc_pos];
    if (cc_op != CC_OP_DYNAMIC)
        env->cc_op = cc_op;
}