target/riscv: Allow debugger to access seed CSR

[mirror_qemu.git] / tcg / tcg-op.c

/*
 * Tiny Code Generator for QEMU
 *
 * Copyright (c) 2008 Fabrice Bellard
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

#include "qemu/osdep.h"
#include "exec/exec-all.h"
#include "tcg/tcg.h"
#include "tcg/tcg-op.h"
#include "tcg/tcg-mo.h"
#include "exec/plugin-gen.h"
#include "tcg-internal.h"


void tcg_gen_op1(TCGOpcode opc, TCGArg a1)
{
    TCGOp *op = tcg_emit_op(opc, 1);
    op->args[0] = a1;
}

void tcg_gen_op2(TCGOpcode opc, TCGArg a1, TCGArg a2)
{
    TCGOp *op = tcg_emit_op(opc, 2);
    op->args[0] = a1;
    op->args[1] = a2;
}

void tcg_gen_op3(TCGOpcode opc, TCGArg a1, TCGArg a2, TCGArg a3)
{
    TCGOp *op = tcg_emit_op(opc, 3);
    op->args[0] = a1;
    op->args[1] = a2;
    op->args[2] = a3;
}

void tcg_gen_op4(TCGOpcode opc, TCGArg a1, TCGArg a2, TCGArg a3, TCGArg a4)
{
    TCGOp *op = tcg_emit_op(opc, 4);
    op->args[0] = a1;
    op->args[1] = a2;
    op->args[2] = a3;
    op->args[3] = a4;
}

void tcg_gen_op5(TCGOpcode opc, TCGArg a1, TCGArg a2, TCGArg a3,
                 TCGArg a4, TCGArg a5)
{
    TCGOp *op = tcg_emit_op(opc, 5);
    op->args[0] = a1;
    op->args[1] = a2;
    op->args[2] = a3;
    op->args[3] = a4;
    op->args[4] = a5;
}

void tcg_gen_op6(TCGOpcode opc, TCGArg a1, TCGArg a2, TCGArg a3,
                 TCGArg a4, TCGArg a5, TCGArg a6)
{
    TCGOp *op = tcg_emit_op(opc, 6);
    op->args[0] = a1;
    op->args[1] = a2;
    op->args[2] = a3;
    op->args[3] = a4;
    op->args[4] = a5;
    op->args[5] = a6;
}

void tcg_gen_mb(TCGBar mb_type)
{
    if (tcg_ctx->gen_tb->cflags & CF_PARALLEL) {
        tcg_gen_op1(INDEX_op_mb, mb_type);
    }
}

/* 32 bit ops */

void tcg_gen_movi_i32(TCGv_i32 ret, int32_t arg)
{
    tcg_gen_mov_i32(ret, tcg_constant_i32(arg));
}

void tcg_gen_addi_i32(TCGv_i32 ret, TCGv_i32 arg1, int32_t arg2)
{
    /* some cases can be optimized here */
    if (arg2 == 0) {
        tcg_gen_mov_i32(ret, arg1);
    } else {
        tcg_gen_add_i32(ret, arg1, tcg_constant_i32(arg2));
    }
}

void tcg_gen_subfi_i32(TCGv_i32 ret, int32_t arg1, TCGv_i32 arg2)
{
    if (arg1 == 0 && TCG_TARGET_HAS_neg_i32) {
        /* Don't recurse with tcg_gen_neg_i32.  */
        tcg_gen_op2_i32(INDEX_op_neg_i32, ret, arg2);
    } else {
        tcg_gen_sub_i32(ret, tcg_constant_i32(arg1), arg2);
    }
}

void tcg_gen_subi_i32(TCGv_i32 ret, TCGv_i32 arg1, int32_t arg2)
{
    /* some cases can be optimized here */
    if (arg2 == 0) {
        tcg_gen_mov_i32(ret, arg1);
    } else {
        tcg_gen_sub_i32(ret, arg1, tcg_constant_i32(arg2));
    }
}

void tcg_gen_andi_i32(TCGv_i32 ret, TCGv_i32 arg1, int32_t arg2)
{
    /* Some cases can be optimized here.  */
    switch (arg2) {
    case 0:
        tcg_gen_movi_i32(ret, 0);
        return;
    case -1:
        tcg_gen_mov_i32(ret, arg1);
        return;
    case 0xff:
        /* Don't recurse with tcg_gen_ext8u_i32.  */
        if (TCG_TARGET_HAS_ext8u_i32) {
            tcg_gen_op2_i32(INDEX_op_ext8u_i32, ret, arg1);
            return;
        }
        break;
    case 0xffff:
        if (TCG_TARGET_HAS_ext16u_i32) {
            tcg_gen_op2_i32(INDEX_op_ext16u_i32, ret, arg1);
            return;
        }
        break;
    }

    tcg_gen_and_i32(ret, arg1, tcg_constant_i32(arg2));
}

void tcg_gen_ori_i32(TCGv_i32 ret, TCGv_i32 arg1, int32_t arg2)
{
    /* Some cases can be optimized here.  */
    if (arg2 == -1) {
        tcg_gen_movi_i32(ret, -1);
    } else if (arg2 == 0) {
        tcg_gen_mov_i32(ret, arg1);
    } else {
        tcg_gen_or_i32(ret, arg1, tcg_constant_i32(arg2));
    }
}

void tcg_gen_xori_i32(TCGv_i32 ret, TCGv_i32 arg1, int32_t arg2)
{
    /* Some cases can be optimized here.  */
    if (arg2 == 0) {
        tcg_gen_mov_i32(ret, arg1);
    } else if (arg2 == -1 && TCG_TARGET_HAS_not_i32) {
        /* Don't recurse with tcg_gen_not_i32.  */
        tcg_gen_op2_i32(INDEX_op_not_i32, ret, arg1);
    } else {
        tcg_gen_xor_i32(ret, arg1, tcg_constant_i32(arg2));
    }
}

void tcg_gen_shli_i32(TCGv_i32 ret, TCGv_i32 arg1, int32_t arg2)
{
    tcg_debug_assert(arg2 >= 0 && arg2 < 32);
    if (arg2 == 0) {
        tcg_gen_mov_i32(ret, arg1);
    } else {
        tcg_gen_shl_i32(ret, arg1, tcg_constant_i32(arg2));
    }
}

void tcg_gen_shri_i32(TCGv_i32 ret, TCGv_i32 arg1, int32_t arg2)
{
    tcg_debug_assert(arg2 >= 0 && arg2 < 32);
    if (arg2 == 0) {
        tcg_gen_mov_i32(ret, arg1);
    } else {
        tcg_gen_shr_i32(ret, arg1, tcg_constant_i32(arg2));
    }
}

void tcg_gen_sari_i32(TCGv_i32 ret, TCGv_i32 arg1, int32_t arg2)
{
    tcg_debug_assert(arg2 >= 0 && arg2 < 32);
    if (arg2 == 0) {
        tcg_gen_mov_i32(ret, arg1);
    } else {
        tcg_gen_sar_i32(ret, arg1, tcg_constant_i32(arg2));
    }
}

void tcg_gen_brcond_i32(TCGCond cond, TCGv_i32 arg1, TCGv_i32 arg2, TCGLabel *l)
{
    if (cond == TCG_COND_ALWAYS) {
        tcg_gen_br(l);
    } else if (cond != TCG_COND_NEVER) {
        l->refs++;
        tcg_gen_op4ii_i32(INDEX_op_brcond_i32, arg1, arg2, cond, label_arg(l));
    }
}

void tcg_gen_brcondi_i32(TCGCond cond, TCGv_i32 arg1, int32_t arg2, TCGLabel *l)
{
    if (cond == TCG_COND_ALWAYS) {
        tcg_gen_br(l);
    } else if (cond != TCG_COND_NEVER) {
        tcg_gen_brcond_i32(cond, arg1, tcg_constant_i32(arg2), l);
    }
}

void tcg_gen_setcond_i32(TCGCond cond, TCGv_i32 ret,
                         TCGv_i32 arg1, TCGv_i32 arg2)
{
    if (cond == TCG_COND_ALWAYS) {
        tcg_gen_movi_i32(ret, 1);
    } else if (cond == TCG_COND_NEVER) {
        tcg_gen_movi_i32(ret, 0);
    } else {
        tcg_gen_op4i_i32(INDEX_op_setcond_i32, ret, arg1, arg2, cond);
    }
}

void tcg_gen_setcondi_i32(TCGCond cond, TCGv_i32 ret,
                          TCGv_i32 arg1, int32_t arg2)
{
    tcg_gen_setcond_i32(cond, ret, arg1, tcg_constant_i32(arg2));
}

void tcg_gen_muli_i32(TCGv_i32 ret, TCGv_i32 arg1, int32_t arg2)
{
    if (arg2 == 0) {
        tcg_gen_movi_i32(ret, 0);
    } else if (is_power_of_2(arg2)) {
        tcg_gen_shli_i32(ret, arg1, ctz32(arg2));
    } else {
        tcg_gen_mul_i32(ret, arg1, tcg_constant_i32(arg2));
    }
}

void tcg_gen_div_i32(TCGv_i32 ret, TCGv_i32 arg1, TCGv_i32 arg2)
{
    if (TCG_TARGET_HAS_div_i32) {
        tcg_gen_op3_i32(INDEX_op_div_i32, ret, arg1, arg2);
    } else if (TCG_TARGET_HAS_div2_i32) {
        TCGv_i32 t0 = tcg_temp_new_i32();
        tcg_gen_sari_i32(t0, arg1, 31);
        tcg_gen_op5_i32(INDEX_op_div2_i32, ret, t0, arg1, t0, arg2);
        tcg_temp_free_i32(t0);
    } else {
        gen_helper_div_i32(ret, arg1, arg2);
    }
}

void tcg_gen_rem_i32(TCGv_i32 ret, TCGv_i32 arg1, TCGv_i32 arg2)
{
    if (TCG_TARGET_HAS_rem_i32) {
        tcg_gen_op3_i32(INDEX_op_rem_i32, ret, arg1, arg2);
    } else if (TCG_TARGET_HAS_div_i32) {
        TCGv_i32 t0 = tcg_temp_new_i32();
        tcg_gen_op3_i32(INDEX_op_div_i32, t0, arg1, arg2);
        tcg_gen_mul_i32(t0, t0, arg2);
        tcg_gen_sub_i32(ret, arg1, t0);
        tcg_temp_free_i32(t0);
    } else if (TCG_TARGET_HAS_div2_i32) {
        TCGv_i32 t0 = tcg_temp_new_i32();
        tcg_gen_sari_i32(t0, arg1, 31);
        tcg_gen_op5_i32(INDEX_op_div2_i32, t0, ret, arg1, t0, arg2);
        tcg_temp_free_i32(t0);
    } else {
        gen_helper_rem_i32(ret, arg1, arg2);
    }
}

void tcg_gen_divu_i32(TCGv_i32 ret, TCGv_i32 arg1, TCGv_i32 arg2)
{
    if (TCG_TARGET_HAS_div_i32) {
        tcg_gen_op3_i32(INDEX_op_divu_i32, ret, arg1, arg2);
    } else if (TCG_TARGET_HAS_div2_i32) {
        TCGv_i32 t0 = tcg_temp_new_i32();
        tcg_gen_movi_i32(t0, 0);
        tcg_gen_op5_i32(INDEX_op_divu2_i32, ret, t0, arg1, t0, arg2);
        tcg_temp_free_i32(t0);
    } else {
        gen_helper_divu_i32(ret, arg1, arg2);
    }
}

void tcg_gen_remu_i32(TCGv_i32 ret, TCGv_i32 arg1, TCGv_i32 arg2)
{
    if (TCG_TARGET_HAS_rem_i32) {
        tcg_gen_op3_i32(INDEX_op_remu_i32, ret, arg1, arg2);
    } else if (TCG_TARGET_HAS_div_i32) {
        TCGv_i32 t0 = tcg_temp_new_i32();
        tcg_gen_op3_i32(INDEX_op_divu_i32, t0, arg1, arg2);
        tcg_gen_mul_i32(t0, t0, arg2);
        tcg_gen_sub_i32(ret, arg1, t0);
        tcg_temp_free_i32(t0);
    } else if (TCG_TARGET_HAS_div2_i32) {
        TCGv_i32 t0 = tcg_temp_new_i32();
        tcg_gen_movi_i32(t0, 0);
        tcg_gen_op5_i32(INDEX_op_divu2_i32, t0, ret, arg1, t0, arg2);
        tcg_temp_free_i32(t0);
    } else {
        gen_helper_remu_i32(ret, arg1, arg2);
    }
}

void tcg_gen_andc_i32(TCGv_i32 ret, TCGv_i32 arg1, TCGv_i32 arg2)
{
    if (TCG_TARGET_HAS_andc_i32) {
        tcg_gen_op3_i32(INDEX_op_andc_i32, ret, arg1, arg2);
    } else {
        TCGv_i32 t0 = tcg_temp_new_i32();
        tcg_gen_not_i32(t0, arg2);
        tcg_gen_and_i32(ret, arg1, t0);
        tcg_temp_free_i32(t0);
    }
}

void tcg_gen_eqv_i32(TCGv_i32 ret, TCGv_i32 arg1, TCGv_i32 arg2)
{
    if (TCG_TARGET_HAS_eqv_i32) {
        tcg_gen_op3_i32(INDEX_op_eqv_i32, ret, arg1, arg2);
    } else {
        tcg_gen_xor_i32(ret, arg1, arg2);
        tcg_gen_not_i32(ret, ret);
    }
}

void tcg_gen_nand_i32(TCGv_i32 ret, TCGv_i32 arg1, TCGv_i32 arg2)
{
    if (TCG_TARGET_HAS_nand_i32) {
        tcg_gen_op3_i32(INDEX_op_nand_i32, ret, arg1, arg2);
    } else {
        tcg_gen_and_i32(ret, arg1, arg2);
        tcg_gen_not_i32(ret, ret);
    }
}

void tcg_gen_nor_i32(TCGv_i32 ret, TCGv_i32 arg1, TCGv_i32 arg2)
{
    if (TCG_TARGET_HAS_nor_i32) {
        tcg_gen_op3_i32(INDEX_op_nor_i32, ret, arg1, arg2);
    } else {
        tcg_gen_or_i32(ret, arg1, arg2);
        tcg_gen_not_i32(ret, ret);
    }
}

void tcg_gen_orc_i32(TCGv_i32 ret, TCGv_i32 arg1, TCGv_i32 arg2)
{
    if (TCG_TARGET_HAS_orc_i32) {
        tcg_gen_op3_i32(INDEX_op_orc_i32, ret, arg1, arg2);
    } else {
        TCGv_i32 t0 = tcg_temp_new_i32();
        tcg_gen_not_i32(t0, arg2);
        tcg_gen_or_i32(ret, arg1, t0);
        tcg_temp_free_i32(t0);
    }
}

void tcg_gen_clz_i32(TCGv_i32 ret, TCGv_i32 arg1, TCGv_i32 arg2)
{
    if (TCG_TARGET_HAS_clz_i32) {
        tcg_gen_op3_i32(INDEX_op_clz_i32, ret, arg1, arg2);
    } else if (TCG_TARGET_HAS_clz_i64) {
        TCGv_i64 t1 = tcg_temp_new_i64();
        TCGv_i64 t2 = tcg_temp_new_i64();
        tcg_gen_extu_i32_i64(t1, arg1);
        tcg_gen_extu_i32_i64(t2, arg2);
        tcg_gen_addi_i64(t2, t2, 32);
        tcg_gen_clz_i64(t1, t1, t2);
        tcg_gen_extrl_i64_i32(ret, t1);
        tcg_temp_free_i64(t1);
        tcg_temp_free_i64(t2);
        tcg_gen_subi_i32(ret, ret, 32);
    } else {
        gen_helper_clz_i32(ret, arg1, arg2);
    }
}

void tcg_gen_clzi_i32(TCGv_i32 ret, TCGv_i32 arg1, uint32_t arg2)
{
    tcg_gen_clz_i32(ret, arg1, tcg_constant_i32(arg2));
}

void tcg_gen_ctz_i32(TCGv_i32 ret, TCGv_i32 arg1, TCGv_i32 arg2)
{
    if (TCG_TARGET_HAS_ctz_i32) {
        tcg_gen_op3_i32(INDEX_op_ctz_i32, ret, arg1, arg2);
    } else if (TCG_TARGET_HAS_ctz_i64) {
        TCGv_i64 t1 = tcg_temp_new_i64();
        TCGv_i64 t2 = tcg_temp_new_i64();
        tcg_gen_extu_i32_i64(t1, arg1);
        tcg_gen_extu_i32_i64(t2, arg2);
        tcg_gen_ctz_i64(t1, t1, t2);
        tcg_gen_extrl_i64_i32(ret, t1);
        tcg_temp_free_i64(t1);
        tcg_temp_free_i64(t2);
    } else if (TCG_TARGET_HAS_ctpop_i32
               || TCG_TARGET_HAS_ctpop_i64
               || TCG_TARGET_HAS_clz_i32
               || TCG_TARGET_HAS_clz_i64) {
        TCGv_i32 z, t = tcg_temp_new_i32();

        if (TCG_TARGET_HAS_ctpop_i32 || TCG_TARGET_HAS_ctpop_i64) {
            tcg_gen_subi_i32(t, arg1, 1);
            tcg_gen_andc_i32(t, t, arg1);
            tcg_gen_ctpop_i32(t, t);
        } else {
            /* Since all non-x86 hosts have clz(0) == 32, don't fight it.  */
            tcg_gen_neg_i32(t, arg1);
            tcg_gen_and_i32(t, t, arg1);
            tcg_gen_clzi_i32(t, t, 32);
            tcg_gen_xori_i32(t, t, 31);
        }
        z = tcg_constant_i32(0);
        tcg_gen_movcond_i32(TCG_COND_EQ, ret, arg1, z, arg2, t);
        tcg_temp_free_i32(t);
    } else {
        gen_helper_ctz_i32(ret, arg1, arg2);
    }
}

void tcg_gen_ctzi_i32(TCGv_i32 ret, TCGv_i32 arg1, uint32_t arg2)
{
    if (!TCG_TARGET_HAS_ctz_i32 && TCG_TARGET_HAS_ctpop_i32 && arg2 == 32) {
        /* This equivalence has the advantage of not requiring a fixup.  */
        TCGv_i32 t = tcg_temp_new_i32();
        tcg_gen_subi_i32(t, arg1, 1);
        tcg_gen_andc_i32(t, t, arg1);
        tcg_gen_ctpop_i32(ret, t);
        tcg_temp_free_i32(t);
    } else {
        tcg_gen_ctz_i32(ret, arg1, tcg_constant_i32(arg2));
    }
}

void tcg_gen_clrsb_i32(TCGv_i32 ret, TCGv_i32 arg)
{
    if (TCG_TARGET_HAS_clz_i32) {
        TCGv_i32 t = tcg_temp_new_i32();
        tcg_gen_sari_i32(t, arg, 31);
        tcg_gen_xor_i32(t, t, arg);
        tcg_gen_clzi_i32(t, t, 32);
        tcg_gen_subi_i32(ret, t, 1);
        tcg_temp_free_i32(t);
    } else {
        gen_helper_clrsb_i32(ret, arg);
    }
}

void tcg_gen_ctpop_i32(TCGv_i32 ret, TCGv_i32 arg1)
{
    if (TCG_TARGET_HAS_ctpop_i32) {
        tcg_gen_op2_i32(INDEX_op_ctpop_i32, ret, arg1);
    } else if (TCG_TARGET_HAS_ctpop_i64) {
        TCGv_i64 t = tcg_temp_new_i64();
        tcg_gen_extu_i32_i64(t, arg1);
        tcg_gen_ctpop_i64(t, t);
        tcg_gen_extrl_i64_i32(ret, t);
        tcg_temp_free_i64(t);
    } else {
        gen_helper_ctpop_i32(ret, arg1);
    }
}

void tcg_gen_rotl_i32(TCGv_i32 ret, TCGv_i32 arg1, TCGv_i32 arg2)
{
    if (TCG_TARGET_HAS_rot_i32) {
        tcg_gen_op3_i32(INDEX_op_rotl_i32, ret, arg1, arg2);
    } else {
        TCGv_i32 t0, t1;

        t0 = tcg_temp_new_i32();
        t1 = tcg_temp_new_i32();
        tcg_gen_shl_i32(t0, arg1, arg2);
        tcg_gen_subfi_i32(t1, 32, arg2);
        tcg_gen_shr_i32(t1, arg1, t1);
        tcg_gen_or_i32(ret, t0, t1);
        tcg_temp_free_i32(t0);
        tcg_temp_free_i32(t1);
    }
}

void tcg_gen_rotli_i32(TCGv_i32 ret, TCGv_i32 arg1, int32_t arg2)
{
    tcg_debug_assert(arg2 >= 0 && arg2 < 32);
    /* some cases can be optimized here */
    if (arg2 == 0) {
        tcg_gen_mov_i32(ret, arg1);
    } else if (TCG_TARGET_HAS_rot_i32) {
        tcg_gen_rotl_i32(ret, arg1, tcg_constant_i32(arg2));
    } else {
        TCGv_i32 t0, t1;
        t0 = tcg_temp_new_i32();
        t1 = tcg_temp_new_i32();
        tcg_gen_shli_i32(t0, arg1, arg2);
        tcg_gen_shri_i32(t1, arg1, 32 - arg2);
        tcg_gen_or_i32(ret, t0, t1);
        tcg_temp_free_i32(t0);
        tcg_temp_free_i32(t1);
    }
}

void tcg_gen_rotr_i32(TCGv_i32 ret, TCGv_i32 arg1, TCGv_i32 arg2)
{
    if (TCG_TARGET_HAS_rot_i32) {
        tcg_gen_op3_i32(INDEX_op_rotr_i32, ret, arg1, arg2);
    } else {
        TCGv_i32 t0, t1;

        t0 = tcg_temp_new_i32();
        t1 = tcg_temp_new_i32();
        tcg_gen_shr_i32(t0, arg1, arg2);
        tcg_gen_subfi_i32(t1, 32, arg2);
        tcg_gen_shl_i32(t1, arg1, t1);
        tcg_gen_or_i32(ret, t0, t1);
        tcg_temp_free_i32(t0);
        tcg_temp_free_i32(t1);
    }
}

void tcg_gen_rotri_i32(TCGv_i32 ret, TCGv_i32 arg1, int32_t arg2)
{
    tcg_debug_assert(arg2 >= 0 && arg2 < 32);
    /* some cases can be optimized here */
    if (arg2 == 0) {
        tcg_gen_mov_i32(ret, arg1);
    } else {
        tcg_gen_rotli_i32(ret, arg1, 32 - arg2);
    }
}

void tcg_gen_deposit_i32(TCGv_i32 ret, TCGv_i32 arg1, TCGv_i32 arg2,
                         unsigned int ofs, unsigned int len)
{
    uint32_t mask;
    TCGv_i32 t1;

    tcg_debug_assert(ofs < 32);
    tcg_debug_assert(len > 0);
    tcg_debug_assert(len <= 32);
    tcg_debug_assert(ofs + len <= 32);

    if (len == 32) {
        tcg_gen_mov_i32(ret, arg2);
        return;
    }
    if (TCG_TARGET_HAS_deposit_i32 && TCG_TARGET_deposit_i32_valid(ofs, len)) {
        tcg_gen_op5ii_i32(INDEX_op_deposit_i32, ret, arg1, arg2, ofs, len);
        return;
    }

    t1 = tcg_temp_new_i32();

    if (TCG_TARGET_HAS_extract2_i32) {
        if (ofs + len == 32) {
            tcg_gen_shli_i32(t1, arg1, len);
            tcg_gen_extract2_i32(ret, t1, arg2, len);
            goto done;
        }
        if (ofs == 0) {
            tcg_gen_extract2_i32(ret, arg1, arg2, len);
            tcg_gen_rotli_i32(ret, ret, len);
            goto done;
        }
    }

    mask = (1u << len) - 1;
    if (ofs + len < 32) {
        tcg_gen_andi_i32(t1, arg2, mask);
        tcg_gen_shli_i32(t1, t1, ofs);
    } else {
        tcg_gen_shli_i32(t1, arg2, ofs);
    }
    tcg_gen_andi_i32(ret, arg1, ~(mask << ofs));
    tcg_gen_or_i32(ret, ret, t1);
 done:
    tcg_temp_free_i32(t1);
}

void tcg_gen_deposit_z_i32(TCGv_i32 ret, TCGv_i32 arg,
                           unsigned int ofs, unsigned int len)
{
    tcg_debug_assert(ofs < 32);
    tcg_debug_assert(len > 0);
    tcg_debug_assert(len <= 32);
    tcg_debug_assert(ofs + len <= 32);

    if (ofs + len == 32) {
        tcg_gen_shli_i32(ret, arg, ofs);
    } else if (ofs == 0) {
        tcg_gen_andi_i32(ret, arg, (1u << len) - 1);
    } else if (TCG_TARGET_HAS_deposit_i32
               && TCG_TARGET_deposit_i32_valid(ofs, len)) {
        TCGv_i32 zero = tcg_constant_i32(0);
        tcg_gen_op5ii_i32(INDEX_op_deposit_i32, ret, zero, arg, ofs, len);
    } else {
        /* To help two-operand hosts we prefer to zero-extend first,
           which allows ARG to stay live.  */
        switch (len) {
        case 16:
            if (TCG_TARGET_HAS_ext16u_i32) {
                tcg_gen_ext16u_i32(ret, arg);
                tcg_gen_shli_i32(ret, ret, ofs);
                return;
            }
            break;
        case 8:
            if (TCG_TARGET_HAS_ext8u_i32) {
                tcg_gen_ext8u_i32(ret, arg);
                tcg_gen_shli_i32(ret, ret, ofs);
                return;
            }
            break;
        }
        /* Otherwise prefer zero-extension over AND for code size.  */
        switch (ofs + len) {
        case 16:
            if (TCG_TARGET_HAS_ext16u_i32) {
                tcg_gen_shli_i32(ret, arg, ofs);
                tcg_gen_ext16u_i32(ret, ret);
                return;
            }
            break;
        case 8:
            if (TCG_TARGET_HAS_ext8u_i32) {
                tcg_gen_shli_i32(ret, arg, ofs);
                tcg_gen_ext8u_i32(ret, ret);
                return;
            }
            break;
        }
        tcg_gen_andi_i32(ret, arg, (1u << len) - 1);
        tcg_gen_shli_i32(ret, ret, ofs);
    }
}

void tcg_gen_extract_i32(TCGv_i32 ret, TCGv_i32 arg,
                         unsigned int ofs, unsigned int len)
{
    tcg_debug_assert(ofs < 32);
    tcg_debug_assert(len > 0);
    tcg_debug_assert(len <= 32);
    tcg_debug_assert(ofs + len <= 32);

    /* Canonicalize certain special cases, even if extract is supported.  */
    if (ofs + len == 32) {
        tcg_gen_shri_i32(ret, arg, 32 - len);
        return;
    }
    if (ofs == 0) {
        tcg_gen_andi_i32(ret, arg, (1u << len) - 1);
        return;
    }

    if (TCG_TARGET_HAS_extract_i32
        && TCG_TARGET_extract_i32_valid(ofs, len)) {
        tcg_gen_op4ii_i32(INDEX_op_extract_i32, ret, arg, ofs, len);
        return;
    }

    /* Assume that zero-extension, if available, is cheaper than a shift.  */
    switch (ofs + len) {
    case 16:
        if (TCG_TARGET_HAS_ext16u_i32) {
            tcg_gen_ext16u_i32(ret, arg);
            tcg_gen_shri_i32(ret, ret, ofs);
            return;
        }
        break;
    case 8:
        if (TCG_TARGET_HAS_ext8u_i32) {
            tcg_gen_ext8u_i32(ret, arg);
            tcg_gen_shri_i32(ret, ret, ofs);
            return;
        }
        break;
    }

    /* ??? Ideally we'd know what values are available for immediate AND.
       Assume that 8 bits are available, plus the special case of 16,
       so that we get ext8u, ext16u.  */
    switch (len) {
    case 1 ... 8: case 16:
        tcg_gen_shri_i32(ret, arg, ofs);
        tcg_gen_andi_i32(ret, ret, (1u << len) - 1);
        break;
    default:
        tcg_gen_shli_i32(ret, arg, 32 - len - ofs);
        tcg_gen_shri_i32(ret, ret, 32 - len);
        break;
    }
}

void tcg_gen_sextract_i32(TCGv_i32 ret, TCGv_i32 arg,
                          unsigned int ofs, unsigned int len)
{
    tcg_debug_assert(ofs < 32);
    tcg_debug_assert(len > 0);
    tcg_debug_assert(len <= 32);
    tcg_debug_assert(ofs + len <= 32);

    /* Canonicalize certain special cases, even if extract is supported.  */
    if (ofs + len == 32) {
        tcg_gen_sari_i32(ret, arg, 32 - len);
        return;
    }
    if (ofs == 0) {
        switch (len) {
        case 16:
            tcg_gen_ext16s_i32(ret, arg);
            return;
        case 8:
            tcg_gen_ext8s_i32(ret, arg);
            return;
        }
    }

    if (TCG_TARGET_HAS_sextract_i32
        && TCG_TARGET_extract_i32_valid(ofs, len)) {
        tcg_gen_op4ii_i32(INDEX_op_sextract_i32, ret, arg, ofs, len);
        return;
    }

    /* Assume that sign-extension, if available, is cheaper than a shift.  */
    switch (ofs + len) {
    case 16:
        if (TCG_TARGET_HAS_ext16s_i32) {
            tcg_gen_ext16s_i32(ret, arg);
            tcg_gen_sari_i32(ret, ret, ofs);
            return;
        }
        break;
    case 8:
        if (TCG_TARGET_HAS_ext8s_i32) {
            tcg_gen_ext8s_i32(ret, arg);
            tcg_gen_sari_i32(ret, ret, ofs);
            return;
        }
        break;
    }
    switch (len) {
    case 16:
        if (TCG_TARGET_HAS_ext16s_i32) {
            tcg_gen_shri_i32(ret, arg, ofs);
            tcg_gen_ext16s_i32(ret, ret);
            return;
        }
        break;
    case 8:
        if (TCG_TARGET_HAS_ext8s_i32) {
            tcg_gen_shri_i32(ret, arg, ofs);
            tcg_gen_ext8s_i32(ret, ret);
            return;
        }
        break;
    }

    tcg_gen_shli_i32(ret, arg, 32 - len - ofs);
    tcg_gen_sari_i32(ret, ret, 32 - len);
}

/*
 * Extract 32-bits from a 64-bit input, ah:al, starting from ofs.
 * Unlike tcg_gen_extract_i32 above, len is fixed at 32.
 */
void tcg_gen_extract2_i32(TCGv_i32 ret, TCGv_i32 al, TCGv_i32 ah,
                          unsigned int ofs)
{
    tcg_debug_assert(ofs <= 32);
    if (ofs == 0) {
        tcg_gen_mov_i32(ret, al);
    } else if (ofs == 32) {
        tcg_gen_mov_i32(ret, ah);
    } else if (al == ah) {
        tcg_gen_rotri_i32(ret, al, ofs);
    } else if (TCG_TARGET_HAS_extract2_i32) {
        tcg_gen_op4i_i32(INDEX_op_extract2_i32, ret, al, ah, ofs);
    } else {
        TCGv_i32 t0 = tcg_temp_new_i32();
        tcg_gen_shri_i32(t0, al, ofs);
        tcg_gen_deposit_i32(ret, t0, ah, 32 - ofs, ofs);
        tcg_temp_free_i32(t0);
    }
}

void tcg_gen_movcond_i32(TCGCond cond, TCGv_i32 ret, TCGv_i32 c1,
                         TCGv_i32 c2, TCGv_i32 v1, TCGv_i32 v2)
{
    if (cond == TCG_COND_ALWAYS) {
        tcg_gen_mov_i32(ret, v1);
    } else if (cond == TCG_COND_NEVER) {
        tcg_gen_mov_i32(ret, v2);
    } else if (TCG_TARGET_HAS_movcond_i32) {
        tcg_gen_op6i_i32(INDEX_op_movcond_i32, ret, c1, c2, v1, v2, cond);
    } else {
        TCGv_i32 t0 = tcg_temp_new_i32();
        TCGv_i32 t1 = tcg_temp_new_i32();
        tcg_gen_setcond_i32(cond, t0, c1, c2);
        tcg_gen_neg_i32(t0, t0);
        tcg_gen_and_i32(t1, v1, t0);
        tcg_gen_andc_i32(ret, v2, t0);
        tcg_gen_or_i32(ret, ret, t1);
        tcg_temp_free_i32(t0);
        tcg_temp_free_i32(t1);
    }
}

void tcg_gen_add2_i32(TCGv_i32 rl, TCGv_i32 rh, TCGv_i32 al,
                      TCGv_i32 ah, TCGv_i32 bl, TCGv_i32 bh)
{
    if (TCG_TARGET_HAS_add2_i32) {
        tcg_gen_op6_i32(INDEX_op_add2_i32, rl, rh, al, ah, bl, bh);
    } else {
        TCGv_i64 t0 = tcg_temp_new_i64();
        TCGv_i64 t1 = tcg_temp_new_i64();
        tcg_gen_concat_i32_i64(t0, al, ah);
        tcg_gen_concat_i32_i64(t1, bl, bh);
        tcg_gen_add_i64(t0, t0, t1);
        tcg_gen_extr_i64_i32(rl, rh, t0);
        tcg_temp_free_i64(t0);
        tcg_temp_free_i64(t1);
    }
}

void tcg_gen_sub2_i32(TCGv_i32 rl, TCGv_i32 rh, TCGv_i32 al,
                      TCGv_i32 ah, TCGv_i32 bl, TCGv_i32 bh)
{
    if (TCG_TARGET_HAS_sub2_i32) {
        tcg_gen_op6_i32(INDEX_op_sub2_i32, rl, rh, al, ah, bl, bh);
    } else {
        TCGv_i64 t0 = tcg_temp_new_i64();
        TCGv_i64 t1 = tcg_temp_new_i64();
        tcg_gen_concat_i32_i64(t0, al, ah);
        tcg_gen_concat_i32_i64(t1, bl, bh);
        tcg_gen_sub_i64(t0, t0, t1);
        tcg_gen_extr_i64_i32(rl, rh, t0);
        tcg_temp_free_i64(t0);
        tcg_temp_free_i64(t1);
    }
}

void tcg_gen_mulu2_i32(TCGv_i32 rl, TCGv_i32 rh, TCGv_i32 arg1, TCGv_i32 arg2)
{
    if (TCG_TARGET_HAS_mulu2_i32) {
        tcg_gen_op4_i32(INDEX_op_mulu2_i32, rl, rh, arg1, arg2);
    } else if (TCG_TARGET_HAS_muluh_i32) {
        TCGv_i32 t = tcg_temp_new_i32();
        tcg_gen_op3_i32(INDEX_op_mul_i32, t, arg1, arg2);
        tcg_gen_op3_i32(INDEX_op_muluh_i32, rh, arg1, arg2);
        tcg_gen_mov_i32(rl, t);
        tcg_temp_free_i32(t);
    } else if (TCG_TARGET_REG_BITS == 64) {
        TCGv_i64 t0 = tcg_temp_new_i64();
        TCGv_i64 t1 = tcg_temp_new_i64();
        tcg_gen_extu_i32_i64(t0, arg1);
        tcg_gen_extu_i32_i64(t1, arg2);
        tcg_gen_mul_i64(t0, t0, t1);
        tcg_gen_extr_i64_i32(rl, rh, t0);
        tcg_temp_free_i64(t0);
        tcg_temp_free_i64(t1);
    } else {
        qemu_build_not_reached();
    }
}

void tcg_gen_muls2_i32(TCGv_i32 rl, TCGv_i32 rh, TCGv_i32 arg1, TCGv_i32 arg2)
{
    if (TCG_TARGET_HAS_muls2_i32) {
        tcg_gen_op4_i32(INDEX_op_muls2_i32, rl, rh, arg1, arg2);
    } else if (TCG_TARGET_HAS_mulsh_i32) {
        TCGv_i32 t = tcg_temp_new_i32();
        tcg_gen_op3_i32(INDEX_op_mul_i32, t, arg1, arg2);
        tcg_gen_op3_i32(INDEX_op_mulsh_i32, rh, arg1, arg2);
        tcg_gen_mov_i32(rl, t);
        tcg_temp_free_i32(t);
    } else if (TCG_TARGET_REG_BITS == 32) {
        TCGv_i32 t0 = tcg_temp_new_i32();
        TCGv_i32 t1 = tcg_temp_new_i32();
        TCGv_i32 t2 = tcg_temp_new_i32();
        TCGv_i32 t3 = tcg_temp_new_i32();
        tcg_gen_mulu2_i32(t0, t1, arg1, arg2);
        /* Adjust for negative inputs.  */
        tcg_gen_sari_i32(t2, arg1, 31);
        tcg_gen_sari_i32(t3, arg2, 31);
        tcg_gen_and_i32(t2, t2, arg2);
        tcg_gen_and_i32(t3, t3, arg1);
        tcg_gen_sub_i32(rh, t1, t2);
        tcg_gen_sub_i32(rh, rh, t3);
        tcg_gen_mov_i32(rl, t0);
        tcg_temp_free_i32(t0);
        tcg_temp_free_i32(t1);
        tcg_temp_free_i32(t2);
        tcg_temp_free_i32(t3);
    } else {
        TCGv_i64 t0 = tcg_temp_new_i64();
        TCGv_i64 t1 = tcg_temp_new_i64();
        tcg_gen_ext_i32_i64(t0, arg1);
        tcg_gen_ext_i32_i64(t1, arg2);
        tcg_gen_mul_i64(t0, t0, t1);
        tcg_gen_extr_i64_i32(rl, rh, t0);
        tcg_temp_free_i64(t0);
        tcg_temp_free_i64(t1);
    }
}

void tcg_gen_mulsu2_i32(TCGv_i32 rl, TCGv_i32 rh, TCGv_i32 arg1, TCGv_i32 arg2)
{
    if (TCG_TARGET_REG_BITS == 32) {
        TCGv_i32 t0 = tcg_temp_new_i32();
        TCGv_i32 t1 = tcg_temp_new_i32();
        TCGv_i32 t2 = tcg_temp_new_i32();
        tcg_gen_mulu2_i32(t0, t1, arg1, arg2);
        /* Adjust for negative input for the signed arg1.  */
        tcg_gen_sari_i32(t2, arg1, 31);
        tcg_gen_and_i32(t2, t2, arg2);
        tcg_gen_sub_i32(rh, t1, t2);
        tcg_gen_mov_i32(rl, t0);
        tcg_temp_free_i32(t0);
        tcg_temp_free_i32(t1);
        tcg_temp_free_i32(t2);
    } else {
        TCGv_i64 t0 = tcg_temp_new_i64();
        TCGv_i64 t1 = tcg_temp_new_i64();
        tcg_gen_ext_i32_i64(t0, arg1);
        tcg_gen_extu_i32_i64(t1, arg2);
        tcg_gen_mul_i64(t0, t0, t1);
        tcg_gen_extr_i64_i32(rl, rh, t0);
        tcg_temp_free_i64(t0);
        tcg_temp_free_i64(t1);
    }
}

void tcg_gen_ext8s_i32(TCGv_i32 ret, TCGv_i32 arg)
{
    if (TCG_TARGET_HAS_ext8s_i32) {
        tcg_gen_op2_i32(INDEX_op_ext8s_i32, ret, arg);
    } else {
        tcg_gen_shli_i32(ret, arg, 24);
        tcg_gen_sari_i32(ret, ret, 24);
    }
}

void tcg_gen_ext16s_i32(TCGv_i32 ret, TCGv_i32 arg)
{
    if (TCG_TARGET_HAS_ext16s_i32) {
        tcg_gen_op2_i32(INDEX_op_ext16s_i32, ret, arg);
    } else {
        tcg_gen_shli_i32(ret, arg, 16);
        tcg_gen_sari_i32(ret, ret, 16);
    }
}

void tcg_gen_ext8u_i32(TCGv_i32 ret, TCGv_i32 arg)
{
    if (TCG_TARGET_HAS_ext8u_i32) {
        tcg_gen_op2_i32(INDEX_op_ext8u_i32, ret, arg);
    } else {
        tcg_gen_andi_i32(ret, arg, 0xffu);
    }
}

void tcg_gen_ext16u_i32(TCGv_i32 ret, TCGv_i32 arg)
{
    if (TCG_TARGET_HAS_ext16u_i32) {
        tcg_gen_op2_i32(INDEX_op_ext16u_i32, ret, arg);
    } else {
        tcg_gen_andi_i32(ret, arg, 0xffffu);
    }
}

void tcg_gen_bswap16_i32(TCGv_i32 ret, TCGv_i32 arg, int flags)
{
    /* Only one extension flag may be present. */
    tcg_debug_assert(!(flags & TCG_BSWAP_OS) || !(flags & TCG_BSWAP_OZ));

    if (TCG_TARGET_HAS_bswap16_i32) {
        tcg_gen_op3i_i32(INDEX_op_bswap16_i32, ret, arg, flags);
    } else {
        TCGv_i32 t0 = tcg_temp_new_i32();
        TCGv_i32 t1 = tcg_temp_new_i32();

        tcg_gen_shri_i32(t0, arg, 8);
        if (!(flags & TCG_BSWAP_IZ)) {
            tcg_gen_ext8u_i32(t0, t0);
        }

        if (flags & TCG_BSWAP_OS) {
            tcg_gen_shli_i32(t1, arg, 24);
            tcg_gen_sari_i32(t1, t1, 16);
        } else if (flags & TCG_BSWAP_OZ) {
            tcg_gen_ext8u_i32(t1, arg);
            tcg_gen_shli_i32(t1, t1, 8);
        } else {
            tcg_gen_shli_i32(t1, arg, 8);
        }

        tcg_gen_or_i32(ret, t0, t1);
        tcg_temp_free_i32(t0);
        tcg_temp_free_i32(t1);
    }
}

void tcg_gen_bswap32_i32(TCGv_i32 ret, TCGv_i32 arg)
{
    if (TCG_TARGET_HAS_bswap32_i32) {
        tcg_gen_op3i_i32(INDEX_op_bswap32_i32, ret, arg, 0);
    } else {
        TCGv_i32 t0 = tcg_temp_new_i32();
        TCGv_i32 t1 = tcg_temp_new_i32();
        TCGv_i32 t2 = tcg_constant_i32(0x00ff00ff);

                                        /* arg = abcd */
        tcg_gen_shri_i32(t0, arg, 8);   /*  t0 = .abc */
        tcg_gen_and_i32(t1, arg, t2);   /*  t1 = .b.d */
        tcg_gen_and_i32(t0, t0, t2);    /*  t0 = .a.c */
        tcg_gen_shli_i32(t1, t1, 8);    /*  t1 = b.d. */
        tcg_gen_or_i32(ret, t0, t1);    /* ret = badc */

        tcg_gen_shri_i32(t0, ret, 16);  /*  t0 = ..ba */
        tcg_gen_shli_i32(t1, ret, 16);  /*  t1 = dc.. */
        tcg_gen_or_i32(ret, t0, t1);    /* ret = dcba */

        tcg_temp_free_i32(t0);
        tcg_temp_free_i32(t1);
    }
}

void tcg_gen_hswap_i32(TCGv_i32 ret, TCGv_i32 arg)
{
    /* Swapping 2 16-bit elements is a rotate. */
    tcg_gen_rotli_i32(ret, arg, 16);
}

void tcg_gen_smin_i32(TCGv_i32 ret, TCGv_i32 a, TCGv_i32 b)
{
    tcg_gen_movcond_i32(TCG_COND_LT, ret, a, b, a, b);
}

void tcg_gen_umin_i32(TCGv_i32 ret, TCGv_i32 a, TCGv_i32 b)
{
    tcg_gen_movcond_i32(TCG_COND_LTU, ret, a, b, a, b);
}

void tcg_gen_smax_i32(TCGv_i32 ret, TCGv_i32 a, TCGv_i32 b)
{
    tcg_gen_movcond_i32(TCG_COND_LT, ret, a, b, b, a);
}

void tcg_gen_umax_i32(TCGv_i32 ret, TCGv_i32 a, TCGv_i32 b)
{
    tcg_gen_movcond_i32(TCG_COND_LTU, ret, a, b, b, a);
}

void tcg_gen_abs_i32(TCGv_i32 ret, TCGv_i32 a)
{
    TCGv_i32 t = tcg_temp_new_i32();

    tcg_gen_sari_i32(t, a, 31);
    tcg_gen_xor_i32(ret, a, t);
    tcg_gen_sub_i32(ret, ret, t);
    tcg_temp_free_i32(t);
}

/* 64-bit ops */

#if TCG_TARGET_REG_BITS == 32
/* These are all inline for TCG_TARGET_REG_BITS == 64.  */

void tcg_gen_discard_i64(TCGv_i64 arg)
{
    tcg_gen_discard_i32(TCGV_LOW(arg));
    tcg_gen_discard_i32(TCGV_HIGH(arg));
}

void tcg_gen_mov_i64(TCGv_i64 ret, TCGv_i64 arg)
{
    TCGTemp *ts = tcgv_i64_temp(arg);

    /* Canonicalize TCGv_i64 TEMP_CONST into TCGv_i32 TEMP_CONST. */
    if (ts->kind == TEMP_CONST) {
        tcg_gen_movi_i64(ret, ts->val);
    } else {
        tcg_gen_mov_i32(TCGV_LOW(ret), TCGV_LOW(arg));
        tcg_gen_mov_i32(TCGV_HIGH(ret), TCGV_HIGH(arg));
    }
}

void tcg_gen_movi_i64(TCGv_i64 ret, int64_t arg)
{
    tcg_gen_movi_i32(TCGV_LOW(ret), arg);
    tcg_gen_movi_i32(TCGV_HIGH(ret), arg >> 32);
}

void tcg_gen_ld8u_i64(TCGv_i64 ret, TCGv_ptr arg2, tcg_target_long offset)
{
    tcg_gen_ld8u_i32(TCGV_LOW(ret), arg2, offset);
    tcg_gen_movi_i32(TCGV_HIGH(ret), 0);
}

void tcg_gen_ld8s_i64(TCGv_i64 ret, TCGv_ptr arg2, tcg_target_long offset)
{
    tcg_gen_ld8s_i32(TCGV_LOW(ret), arg2, offset);
    tcg_gen_sari_i32(TCGV_HIGH(ret), TCGV_LOW(ret), 31);
}

void tcg_gen_ld16u_i64(TCGv_i64 ret, TCGv_ptr arg2, tcg_target_long offset)
{
    tcg_gen_ld16u_i32(TCGV_LOW(ret), arg2, offset);
    tcg_gen_movi_i32(TCGV_HIGH(ret), 0);
}

void tcg_gen_ld16s_i64(TCGv_i64 ret, TCGv_ptr arg2, tcg_target_long offset)
{
    tcg_gen_ld16s_i32(TCGV_LOW(ret), arg2, offset);
    tcg_gen_sari_i32(TCGV_HIGH(ret), TCGV_LOW(ret), 31);
}

void tcg_gen_ld32u_i64(TCGv_i64 ret, TCGv_ptr arg2, tcg_target_long offset)
{
    tcg_gen_ld_i32(TCGV_LOW(ret), arg2, offset);
    tcg_gen_movi_i32(TCGV_HIGH(ret), 0);
}

void tcg_gen_ld32s_i64(TCGv_i64 ret, TCGv_ptr arg2, tcg_target_long offset)
{
    tcg_gen_ld_i32(TCGV_LOW(ret), arg2, offset);
    tcg_gen_sari_i32(TCGV_HIGH(ret), TCGV_LOW(ret), 31);
}

void tcg_gen_ld_i64(TCGv_i64 ret, TCGv_ptr arg2, tcg_target_long offset)
{
    /* Since arg2 and ret have different types,
       they cannot be the same temporary */
#if HOST_BIG_ENDIAN
    tcg_gen_ld_i32(TCGV_HIGH(ret), arg2, offset);
    tcg_gen_ld_i32(TCGV_LOW(ret), arg2, offset + 4);
#else
    tcg_gen_ld_i32(TCGV_LOW(ret), arg2, offset);
    tcg_gen_ld_i32(TCGV_HIGH(ret), arg2, offset + 4);
#endif
}

void tcg_gen_st8_i64(TCGv_i64 arg1, TCGv_ptr arg2, tcg_target_long offset)
{
    tcg_gen_st8_i32(TCGV_LOW(arg1), arg2, offset);
}

void tcg_gen_st16_i64(TCGv_i64 arg1, TCGv_ptr arg2, tcg_target_long offset)
{
    tcg_gen_st16_i32(TCGV_LOW(arg1), arg2, offset);
}

void tcg_gen_st32_i64(TCGv_i64 arg1, TCGv_ptr arg2, tcg_target_long offset)
{
    tcg_gen_st_i32(TCGV_LOW(arg1), arg2, offset);
}

void tcg_gen_st_i64(TCGv_i64 arg1, TCGv_ptr arg2, tcg_target_long offset)
{
#if HOST_BIG_ENDIAN
    tcg_gen_st_i32(TCGV_HIGH(arg1), arg2, offset);
    tcg_gen_st_i32(TCGV_LOW(arg1), arg2, offset + 4);
#else
    tcg_gen_st_i32(TCGV_LOW(arg1), arg2, offset);
    tcg_gen_st_i32(TCGV_HIGH(arg1), arg2, offset + 4);
#endif
}

void tcg_gen_add_i64(TCGv_i64 ret, TCGv_i64 arg1, TCGv_i64 arg2)
{
    tcg_gen_add2_i32(TCGV_LOW(ret), TCGV_HIGH(ret), TCGV_LOW(arg1),
                     TCGV_HIGH(arg1), TCGV_LOW(arg2), TCGV_HIGH(arg2));
}

void tcg_gen_sub_i64(TCGv_i64 ret, TCGv_i64 arg1, TCGv_i64 arg2)
{
    tcg_gen_sub2_i32(TCGV_LOW(ret), TCGV_HIGH(ret), TCGV_LOW(arg1),
                     TCGV_HIGH(arg1), TCGV_LOW(arg2), TCGV_HIGH(arg2));
}

void tcg_gen_and_i64(TCGv_i64 ret, TCGv_i64 arg1, TCGv_i64 arg2)
{
    tcg_gen_and_i32(TCGV_LOW(ret), TCGV_LOW(arg1), TCGV_LOW(arg2));
    tcg_gen_and_i32(TCGV_HIGH(ret), TCGV_HIGH(arg1), TCGV_HIGH(arg2));
}

void tcg_gen_or_i64(TCGv_i64 ret, TCGv_i64 arg1, TCGv_i64 arg2)
{
    tcg_gen_or_i32(TCGV_LOW(ret), TCGV_LOW(arg1), TCGV_LOW(arg2));
    tcg_gen_or_i32(TCGV_HIGH(ret), TCGV_HIGH(arg1), TCGV_HIGH(arg2));
}

void tcg_gen_xor_i64(TCGv_i64 ret, TCGv_i64 arg1, TCGv_i64 arg2)
{
    tcg_gen_xor_i32(TCGV_LOW(ret), TCGV_LOW(arg1), TCGV_LOW(arg2));
    tcg_gen_xor_i32(TCGV_HIGH(ret), TCGV_HIGH(arg1), TCGV_HIGH(arg2));
}

void tcg_gen_shl_i64(TCGv_i64 ret, TCGv_i64 arg1, TCGv_i64 arg2)
{
    gen_helper_shl_i64(ret, arg1, arg2);
}

void tcg_gen_shr_i64(TCGv_i64 ret, TCGv_i64 arg1, TCGv_i64 arg2)
{
    gen_helper_shr_i64(ret, arg1, arg2);
}

void tcg_gen_sar_i64(TCGv_i64 ret, TCGv_i64 arg1, TCGv_i64 arg2)
{
    gen_helper_sar_i64(ret, arg1, arg2);
}

void tcg_gen_mul_i64(TCGv_i64 ret, TCGv_i64 arg1, TCGv_i64 arg2)
{
    TCGv_i64 t0;
    TCGv_i32 t1;

    t0 = tcg_temp_new_i64();
    t1 = tcg_temp_new_i32();

    tcg_gen_mulu2_i32(TCGV_LOW(t0), TCGV_HIGH(t0),
                      TCGV_LOW(arg1), TCGV_LOW(arg2));

    tcg_gen_mul_i32(t1, TCGV_LOW(arg1), TCGV_HIGH(arg2));
    tcg_gen_add_i32(TCGV_HIGH(t0), TCGV_HIGH(t0), t1);
    tcg_gen_mul_i32(t1, TCGV_HIGH(arg1), TCGV_LOW(arg2));
    tcg_gen_add_i32(TCGV_HIGH(t0), TCGV_HIGH(t0), t1);

    tcg_gen_mov_i64(ret, t0);
    tcg_temp_free_i64(t0);
    tcg_temp_free_i32(t1);
}

#else

void tcg_gen_movi_i64(TCGv_i64 ret, int64_t arg)
{
    tcg_gen_mov_i64(ret, tcg_constant_i64(arg));
}

#endif /* TCG_TARGET_REG_SIZE == 32 */

void tcg_gen_addi_i64(TCGv_i64 ret, TCGv_i64 arg1, int64_t arg2)
{
    /* some cases can be optimized here */
    if (arg2 == 0) {
        tcg_gen_mov_i64(ret, arg1);
    } else if (TCG_TARGET_REG_BITS == 64) {
        tcg_gen_add_i64(ret, arg1, tcg_constant_i64(arg2));
    } else {
        tcg_gen_add2_i32(TCGV_LOW(ret), TCGV_HIGH(ret),
                         TCGV_LOW(arg1), TCGV_HIGH(arg1),
                         tcg_constant_i32(arg2), tcg_constant_i32(arg2 >> 32));
    }
}

void tcg_gen_subfi_i64(TCGv_i64 ret, int64_t arg1, TCGv_i64 arg2)
{
    if (arg1 == 0 && TCG_TARGET_HAS_neg_i64) {
        /* Don't recurse with tcg_gen_neg_i64.  */
        tcg_gen_op2_i64(INDEX_op_neg_i64, ret, arg2);
    } else if (TCG_TARGET_REG_BITS == 64) {
        tcg_gen_sub_i64(ret, tcg_constant_i64(arg1), arg2);
    } else {
        tcg_gen_sub2_i32(TCGV_LOW(ret), TCGV_HIGH(ret),
                         tcg_constant_i32(arg1), tcg_constant_i32(arg1 >> 32),
                         TCGV_LOW(arg2), TCGV_HIGH(arg2));
    }
}

void tcg_gen_subi_i64(TCGv_i64 ret, TCGv_i64 arg1, int64_t arg2)
{
    /* some cases can be optimized here */
    if (arg2 == 0) {
        tcg_gen_mov_i64(ret, arg1);
    } else if (TCG_TARGET_REG_BITS == 64) {
        tcg_gen_sub_i64(ret, arg1, tcg_constant_i64(arg2));
    } else {
        tcg_gen_sub2_i32(TCGV_LOW(ret), TCGV_HIGH(ret),
                         TCGV_LOW(arg1), TCGV_HIGH(arg1),
                         tcg_constant_i32(arg2), tcg_constant_i32(arg2 >> 32));
    }
}

void tcg_gen_andi_i64(TCGv_i64 ret, TCGv_i64 arg1, int64_t arg2)
{
    if (TCG_TARGET_REG_BITS == 32) {
        tcg_gen_andi_i32(TCGV_LOW(ret), TCGV_LOW(arg1), arg2);
        tcg_gen_andi_i32(TCGV_HIGH(ret), TCGV_HIGH(arg1), arg2 >> 32);
        return;
    }

    /* Some cases can be optimized here.  */
    switch (arg2) {
    case 0:
        tcg_gen_movi_i64(ret, 0);
        return;
    case -1:
        tcg_gen_mov_i64(ret, arg1);
        return;
    case 0xff:
        /* Don't recurse with tcg_gen_ext8u_i64.  */
        if (TCG_TARGET_HAS_ext8u_i64) {
            tcg_gen_op2_i64(INDEX_op_ext8u_i64, ret, arg1);
            return;
        }
        break;
    case 0xffff:
        if (TCG_TARGET_HAS_ext16u_i64) {
            tcg_gen_op2_i64(INDEX_op_ext16u_i64, ret, arg1);
            return;
        }
        break;
    case 0xffffffffu:
        if (TCG_TARGET_HAS_ext32u_i64) {
            tcg_gen_op2_i64(INDEX_op_ext32u_i64, ret, arg1);
            return;
        }
        break;
    }

    tcg_gen_and_i64(ret, arg1, tcg_constant_i64(arg2));
}

void tcg_gen_ori_i64(TCGv_i64 ret, TCGv_i64 arg1, int64_t arg2)
{
    if (TCG_TARGET_REG_BITS == 32) {
        tcg_gen_ori_i32(TCGV_LOW(ret), TCGV_LOW(arg1), arg2);
        tcg_gen_ori_i32(TCGV_HIGH(ret), TCGV_HIGH(arg1), arg2 >> 32);
        return;
    }
    /* Some cases can be optimized here.  */
    if (arg2 == -1) {
        tcg_gen_movi_i64(ret, -1);
    } else if (arg2 == 0) {
        tcg_gen_mov_i64(ret, arg1);
    } else {
        tcg_gen_or_i64(ret, arg1, tcg_constant_i64(arg2));
    }
}

void tcg_gen_xori_i64(TCGv_i64 ret, TCGv_i64 arg1, int64_t arg2)
{
    if (TCG_TARGET_REG_BITS == 32) {
        tcg_gen_xori_i32(TCGV_LOW(ret), TCGV_LOW(arg1), arg2);
        tcg_gen_xori_i32(TCGV_HIGH(ret), TCGV_HIGH(arg1), arg2 >> 32);
        return;
    }
    /* Some cases can be optimized here.  */
    if (arg2 == 0) {
        tcg_gen_mov_i64(ret, arg1);
    } else if (arg2 == -1 && TCG_TARGET_HAS_not_i64) {
        /* Don't recurse with tcg_gen_not_i64.  */
        tcg_gen_op2_i64(INDEX_op_not_i64, ret, arg1);
    } else {
        tcg_gen_xor_i64(ret, arg1, tcg_constant_i64(arg2));
    }
}

static inline void tcg_gen_shifti_i64(TCGv_i64 ret, TCGv_i64 arg1,
                                      unsigned c, bool right, bool arith)
{
    tcg_debug_assert(c < 64);
    if (c == 0) {
        tcg_gen_mov_i32(TCGV_LOW(ret), TCGV_LOW(arg1));
        tcg_gen_mov_i32(TCGV_HIGH(ret), TCGV_HIGH(arg1));
    } else if (c >= 32) {
        c -= 32;
        if (right) {
            if (arith) {
                tcg_gen_sari_i32(TCGV_LOW(ret), TCGV_HIGH(arg1), c);
                tcg_gen_sari_i32(TCGV_HIGH(ret), TCGV_HIGH(arg1), 31);
            } else {
                tcg_gen_shri_i32(TCGV_LOW(ret), TCGV_HIGH(arg1), c);
                tcg_gen_movi_i32(TCGV_HIGH(ret), 0);
            }
        } else {
            tcg_gen_shli_i32(TCGV_HIGH(ret), TCGV_LOW(arg1), c);
            tcg_gen_movi_i32(TCGV_LOW(ret), 0);
        }
    } else if (right) {
        if (TCG_TARGET_HAS_extract2_i32) {
            tcg_gen_extract2_i32(TCGV_LOW(ret),
                                 TCGV_LOW(arg1), TCGV_HIGH(arg1), c);
        } else {
            tcg_gen_shri_i32(TCGV_LOW(ret), TCGV_LOW(arg1), c);
            tcg_gen_deposit_i32(TCGV_LOW(ret), TCGV_LOW(ret),
                                TCGV_HIGH(arg1), 32 - c, c);
        }
        if (arith) {
            tcg_gen_sari_i32(TCGV_HIGH(ret), TCGV_HIGH(arg1), c);
        } else {
            tcg_gen_shri_i32(TCGV_HIGH(ret), TCGV_HIGH(arg1), c);
        }
    } else {
        if (TCG_TARGET_HAS_extract2_i32) {
            tcg_gen_extract2_i32(TCGV_HIGH(ret),
                                 TCGV_LOW(arg1), TCGV_HIGH(arg1), 32 - c);
        } else {
            TCGv_i32 t0 = tcg_temp_new_i32();
            tcg_gen_shri_i32(t0, TCGV_LOW(arg1), 32 - c);
            tcg_gen_deposit_i32(TCGV_HIGH(ret), t0,
                                TCGV_HIGH(arg1), c, 32 - c);
            tcg_temp_free_i32(t0);
        }
        tcg_gen_shli_i32(TCGV_LOW(ret), TCGV_LOW(arg1), c);
    }
}

void tcg_gen_shli_i64(TCGv_i64 ret, TCGv_i64 arg1, int64_t arg2)
{
    tcg_debug_assert(arg2 >= 0 && arg2 < 64);
    if (TCG_TARGET_REG_BITS == 32) {
        tcg_gen_shifti_i64(ret, arg1, arg2, 0, 0);
    } else if (arg2 == 0) {
        tcg_gen_mov_i64(ret, arg1);
    } else {
        tcg_gen_shl_i64(ret, arg1, tcg_constant_i64(arg2));
    }
}

void tcg_gen_shri_i64(TCGv_i64 ret, TCGv_i64 arg1, int64_t arg2)
{
    tcg_debug_assert(arg2 >= 0 && arg2 < 64);
    if (TCG_TARGET_REG_BITS == 32) {
        tcg_gen_shifti_i64(ret, arg1, arg2, 1, 0);
    } else if (arg2 == 0) {
        tcg_gen_mov_i64(ret, arg1);
    } else {
        tcg_gen_shr_i64(ret, arg1, tcg_constant_i64(arg2));
    }
}

void tcg_gen_sari_i64(TCGv_i64 ret, TCGv_i64 arg1, int64_t arg2)
{
    tcg_debug_assert(arg2 >= 0 && arg2 < 64);
    if (TCG_TARGET_REG_BITS == 32) {
        tcg_gen_shifti_i64(ret, arg1, arg2, 1, 1);
    } else if (arg2 == 0) {
        tcg_gen_mov_i64(ret, arg1);
    } else {
        tcg_gen_sar_i64(ret, arg1, tcg_constant_i64(arg2));
    }
}

void tcg_gen_brcond_i64(TCGCond cond, TCGv_i64 arg1, TCGv_i64 arg2, TCGLabel *l)
{
    if (cond == TCG_COND_ALWAYS) {
        tcg_gen_br(l);
    } else if (cond != TCG_COND_NEVER) {
        l->refs++;
        if (TCG_TARGET_REG_BITS == 32) {
            tcg_gen_op6ii_i32(INDEX_op_brcond2_i32, TCGV_LOW(arg1),
                              TCGV_HIGH(arg1), TCGV_LOW(arg2),
                              TCGV_HIGH(arg2), cond, label_arg(l));
        } else {
            tcg_gen_op4ii_i64(INDEX_op_brcond_i64, arg1, arg2, cond,
                              label_arg(l));
        }
    }
}

void tcg_gen_brcondi_i64(TCGCond cond, TCGv_i64 arg1, int64_t arg2, TCGLabel *l)
{
    if (TCG_TARGET_REG_BITS == 64) {
        tcg_gen_brcond_i64(cond, arg1, tcg_constant_i64(arg2), l);
    } else if (cond == TCG_COND_ALWAYS) {
        tcg_gen_br(l);
    } else if (cond != TCG_COND_NEVER) {
        l->refs++;
        tcg_gen_op6ii_i32(INDEX_op_brcond2_i32,
                          TCGV_LOW(arg1), TCGV_HIGH(arg1),
                          tcg_constant_i32(arg2),
                          tcg_constant_i32(arg2 >> 32),
                          cond, label_arg(l));
    }
}

void tcg_gen_setcond_i64(TCGCond cond, TCGv_i64 ret,
                         TCGv_i64 arg1, TCGv_i64 arg2)
{
    if (cond == TCG_COND_ALWAYS) {
        tcg_gen_movi_i64(ret, 1);
    } else if (cond == TCG_COND_NEVER) {
        tcg_gen_movi_i64(ret, 0);
    } else {
        if (TCG_TARGET_REG_BITS == 32) {
            tcg_gen_op6i_i32(INDEX_op_setcond2_i32, TCGV_LOW(ret),
                             TCGV_LOW(arg1), TCGV_HIGH(arg1),
                             TCGV_LOW(arg2), TCGV_HIGH(arg2), cond);
            tcg_gen_movi_i32(TCGV_HIGH(ret), 0);
        } else {
            tcg_gen_op4i_i64(INDEX_op_setcond_i64, ret, arg1, arg2, cond);
        }
    }
}

void tcg_gen_setcondi_i64(TCGCond cond, TCGv_i64 ret,
                          TCGv_i64 arg1, int64_t arg2)
{
    if (TCG_TARGET_REG_BITS == 64) {
        tcg_gen_setcond_i64(cond, ret, arg1, tcg_constant_i64(arg2));
    } else if (cond == TCG_COND_ALWAYS) {
        tcg_gen_movi_i64(ret, 1);
    } else if (cond == TCG_COND_NEVER) {
        tcg_gen_movi_i64(ret, 0);
    } else {
        tcg_gen_op6i_i32(INDEX_op_setcond2_i32, TCGV_LOW(ret),
                         TCGV_LOW(arg1), TCGV_HIGH(arg1),
                         tcg_constant_i32(arg2),
                         tcg_constant_i32(arg2 >> 32), cond);
        tcg_gen_movi_i32(TCGV_HIGH(ret), 0);
    }
}

void tcg_gen_muli_i64(TCGv_i64 ret, TCGv_i64 arg1, int64_t arg2)
{
    if (arg2 == 0) {
        tcg_gen_movi_i64(ret, 0);
    } else if (is_power_of_2(arg2)) {
        tcg_gen_shli_i64(ret, arg1, ctz64(arg2));
    } else {
        TCGv_i64 t0 = tcg_const_i64(arg2);
        tcg_gen_mul_i64(ret, arg1, t0);
        tcg_temp_free_i64(t0);
    }
}

void tcg_gen_div_i64(TCGv_i64 ret, TCGv_i64 arg1, TCGv_i64 arg2)
{
    if (TCG_TARGET_HAS_div_i64) {
        tcg_gen_op3_i64(INDEX_op_div_i64, ret, arg1, arg2);
    } else if (TCG_TARGET_HAS_div2_i64) {
        TCGv_i64 t0 = tcg_temp_new_i64();
        tcg_gen_sari_i64(t0, arg1, 63);
        tcg_gen_op5_i64(INDEX_op_div2_i64, ret, t0, arg1, t0, arg2);
        tcg_temp_free_i64(t0);
    } else {
        gen_helper_div_i64(ret, arg1, arg2);
    }
}

void tcg_gen_rem_i64(TCGv_i64 ret, TCGv_i64 arg1, TCGv_i64 arg2)
{
    if (TCG_TARGET_HAS_rem_i64) {
        tcg_gen_op3_i64(INDEX_op_rem_i64, ret, arg1, arg2);
    } else if (TCG_TARGET_HAS_div_i64) {
        TCGv_i64 t0 = tcg_temp_new_i64();
        tcg_gen_op3_i64(INDEX_op_div_i64, t0, arg1, arg2);
        tcg_gen_mul_i64(t0, t0, arg2);
        tcg_gen_sub_i64(ret, arg1, t0);
        tcg_temp_free_i64(t0);
    } else if (TCG_TARGET_HAS_div2_i64) {
        TCGv_i64 t0 = tcg_temp_new_i64();
        tcg_gen_sari_i64(t0, arg1, 63);
        tcg_gen_op5_i64(INDEX_op_div2_i64, t0, ret, arg1, t0, arg2);
        tcg_temp_free_i64(t0);
    } else {
        gen_helper_rem_i64(ret, arg1, arg2);
    }
}

void tcg_gen_divu_i64(TCGv_i64 ret, TCGv_i64 arg1, TCGv_i64 arg2)
{
    if (TCG_TARGET_HAS_div_i64) {
        tcg_gen_op3_i64(INDEX_op_divu_i64, ret, arg1, arg2);
    } else if (TCG_TARGET_HAS_div2_i64) {
        TCGv_i64 t0 = tcg_temp_new_i64();
        tcg_gen_movi_i64(t0, 0);
        tcg_gen_op5_i64(INDEX_op_divu2_i64, ret, t0, arg1, t0, arg2);
        tcg_temp_free_i64(t0);
    } else {
        gen_helper_divu_i64(ret, arg1, arg2);
    }
}

void tcg_gen_remu_i64(TCGv_i64 ret, TCGv_i64 arg1, TCGv_i64 arg2)
{
    if (TCG_TARGET_HAS_rem_i64) {
        tcg_gen_op3_i64(INDEX_op_remu_i64, ret, arg1, arg2);
    } else if (TCG_TARGET_HAS_div_i64) {
        TCGv_i64 t0 = tcg_temp_new_i64();
        tcg_gen_op3_i64(INDEX_op_divu_i64, t0, arg1, arg2);
        tcg_gen_mul_i64(t0, t0, arg2);
        tcg_gen_sub_i64(ret, arg1, t0);
        tcg_temp_free_i64(t0);
    } else if (TCG_TARGET_HAS_div2_i64) {
        TCGv_i64 t0 = tcg_temp_new_i64();
        tcg_gen_movi_i64(t0, 0);
        tcg_gen_op5_i64(INDEX_op_divu2_i64, t0, ret, arg1, t0, arg2);
        tcg_temp_free_i64(t0);
    } else {
        gen_helper_remu_i64(ret, arg1, arg2);
    }
}

void tcg_gen_ext8s_i64(TCGv_i64 ret, TCGv_i64 arg)
{
    if (TCG_TARGET_REG_BITS == 32) {
        tcg_gen_ext8s_i32(TCGV_LOW(ret), TCGV_LOW(arg));
        tcg_gen_sari_i32(TCGV_HIGH(ret), TCGV_LOW(ret), 31);
    } else if (TCG_TARGET_HAS_ext8s_i64) {
        tcg_gen_op2_i64(INDEX_op_ext8s_i64, ret, arg);
    } else {
        tcg_gen_shli_i64(ret, arg, 56);
        tcg_gen_sari_i64(ret, ret, 56);
    }
}

void tcg_gen_ext16s_i64(TCGv_i64 ret, TCGv_i64 arg)
{
    if (TCG_TARGET_REG_BITS == 32) {
        tcg_gen_ext16s_i32(TCGV_LOW(ret), TCGV_LOW(arg));
        tcg_gen_sari_i32(TCGV_HIGH(ret), TCGV_LOW(ret), 31);
    } else if (TCG_TARGET_HAS_ext16s_i64) {
        tcg_gen_op2_i64(INDEX_op_ext16s_i64, ret, arg);
    } else {
        tcg_gen_shli_i64(ret, arg, 48);
        tcg_gen_sari_i64(ret, ret, 48);
    }
}

void tcg_gen_ext32s_i64(TCGv_i64 ret, TCGv_i64 arg)
{
    if (TCG_TARGET_REG_BITS == 32) {
        tcg_gen_mov_i32(TCGV_LOW(ret), TCGV_LOW(arg));
        tcg_gen_sari_i32(TCGV_HIGH(ret), TCGV_LOW(ret), 31);
    } else if (TCG_TARGET_HAS_ext32s_i64) {
        tcg_gen_op2_i64(INDEX_op_ext32s_i64, ret, arg);
    } else {
        tcg_gen_shli_i64(ret, arg, 32);
        tcg_gen_sari_i64(ret, ret, 32);
    }
}

void tcg_gen_ext8u_i64(TCGv_i64 ret, TCGv_i64 arg)
{
    if (TCG_TARGET_REG_BITS == 32) {
        tcg_gen_ext8u_i32(TCGV_LOW(ret), TCGV_LOW(arg));
        tcg_gen_movi_i32(TCGV_HIGH(ret), 0);
    } else if (TCG_TARGET_HAS_ext8u_i64) {
        tcg_gen_op2_i64(INDEX_op_ext8u_i64, ret, arg);
    } else {
        tcg_gen_andi_i64(ret, arg, 0xffu);
    }
}

void tcg_gen_ext16u_i64(TCGv_i64 ret, TCGv_i64 arg)
{
    if (TCG_TARGET_REG_BITS == 32) {
        tcg_gen_ext16u_i32(TCGV_LOW(ret), TCGV_LOW(arg));
        tcg_gen_movi_i32(TCGV_HIGH(ret), 0);
    } else if (TCG_TARGET_HAS_ext16u_i64) {
        tcg_gen_op2_i64(INDEX_op_ext16u_i64, ret, arg);
    } else {
        tcg_gen_andi_i64(ret, arg, 0xffffu);
    }
}

void tcg_gen_ext32u_i64(TCGv_i64 ret, TCGv_i64 arg)
{
    if (TCG_TARGET_REG_BITS == 32) {
        tcg_gen_mov_i32(TCGV_LOW(ret), TCGV_LOW(arg));
        tcg_gen_movi_i32(TCGV_HIGH(ret), 0);
    } else if (TCG_TARGET_HAS_ext32u_i64) {
        tcg_gen_op2_i64(INDEX_op_ext32u_i64, ret, arg);
    } else {
        tcg_gen_andi_i64(ret, arg, 0xffffffffu);
    }
}

void tcg_gen_bswap16_i64(TCGv_i64 ret, TCGv_i64 arg, int flags)
{
    /* Only one extension flag may be present. */
    tcg_debug_assert(!(flags & TCG_BSWAP_OS) || !(flags & TCG_BSWAP_OZ));

    if (TCG_TARGET_REG_BITS == 32) {
        tcg_gen_bswap16_i32(TCGV_LOW(ret), TCGV_LOW(arg), flags);
        if (flags & TCG_BSWAP_OS) {
            tcg_gen_sari_i32(TCGV_HIGH(ret), TCGV_LOW(ret), 31);
        } else {
            tcg_gen_movi_i32(TCGV_HIGH(ret), 0);
        }
    } else if (TCG_TARGET_HAS_bswap16_i64) {
        tcg_gen_op3i_i64(INDEX_op_bswap16_i64, ret, arg, flags);
    } else {
        TCGv_i64 t0 = tcg_temp_new_i64();
        TCGv_i64 t1 = tcg_temp_new_i64();

        tcg_gen_shri_i64(t0, arg, 8);
        if (!(flags & TCG_BSWAP_IZ)) {
            tcg_gen_ext8u_i64(t0, t0);
        }

        if (flags & TCG_BSWAP_OS) {
            tcg_gen_shli_i64(t1, arg, 56);
            tcg_gen_sari_i64(t1, t1, 48);
        } else if (flags & TCG_BSWAP_OZ) {
            tcg_gen_ext8u_i64(t1, arg);
            tcg_gen_shli_i64(t1, t1, 8);
        } else {
            tcg_gen_shli_i64(t1, arg, 8);
        }

        tcg_gen_or_i64(ret, t0, t1);
        tcg_temp_free_i64(t0);
        tcg_temp_free_i64(t1);
    }
}

void tcg_gen_bswap32_i64(TCGv_i64 ret, TCGv_i64 arg, int flags)
{
    /* Only one extension flag may be present. */
    tcg_debug_assert(!(flags & TCG_BSWAP_OS) || !(flags & TCG_BSWAP_OZ));

    if (TCG_TARGET_REG_BITS == 32) {
        tcg_gen_bswap32_i32(TCGV_LOW(ret), TCGV_LOW(arg));
        if (flags & TCG_BSWAP_OS) {
            tcg_gen_sari_i32(TCGV_HIGH(ret), TCGV_LOW(ret), 31);
        } else {
            tcg_gen_movi_i32(TCGV_HIGH(ret), 0);
        }
    } else if (TCG_TARGET_HAS_bswap32_i64) {
        tcg_gen_op3i_i64(INDEX_op_bswap32_i64, ret, arg, flags);
    } else {
        TCGv_i64 t0 = tcg_temp_new_i64();
        TCGv_i64 t1 = tcg_temp_new_i64();
        TCGv_i64 t2 = tcg_constant_i64(0x00ff00ff);

                                            /* arg = xxxxabcd */
        tcg_gen_shri_i64(t0, arg, 8);       /*  t0 = .xxxxabc */
        tcg_gen_and_i64(t1, arg, t2);       /*  t1 = .....b.d */
        tcg_gen_and_i64(t0, t0, t2);        /*  t0 = .....a.c */
        tcg_gen_shli_i64(t1, t1, 8);        /*  t1 = ....b.d. */
        tcg_gen_or_i64(ret, t0, t1);        /* ret = ....badc */

        tcg_gen_shli_i64(t1, ret, 48);      /*  t1 = dc...... */
        tcg_gen_shri_i64(t0, ret, 16);      /*  t0 = ......ba */
        if (flags & TCG_BSWAP_OS) {
            tcg_gen_sari_i64(t1, t1, 32);   /*  t1 = ssssdc.. */
        } else {
            tcg_gen_shri_i64(t1, t1, 32);   /*  t1 = ....dc.. */
        }
        tcg_gen_or_i64(ret, t0, t1);        /* ret = ssssdcba */

        tcg_temp_free_i64(t0);
        tcg_temp_free_i64(t1);
    }
}

void tcg_gen_bswap64_i64(TCGv_i64 ret, TCGv_i64 arg)
{
    if (TCG_TARGET_REG_BITS == 32) {
        TCGv_i32 t0, t1;
        t0 = tcg_temp_new_i32();
        t1 = tcg_temp_new_i32();

        tcg_gen_bswap32_i32(t0, TCGV_LOW(arg));
        tcg_gen_bswap32_i32(t1, TCGV_HIGH(arg));
        tcg_gen_mov_i32(TCGV_LOW(ret), t1);
        tcg_gen_mov_i32(TCGV_HIGH(ret), t0);
        tcg_temp_free_i32(t0);
        tcg_temp_free_i32(t1);
    } else if (TCG_TARGET_HAS_bswap64_i64) {
        tcg_gen_op3i_i64(INDEX_op_bswap64_i64, ret, arg, 0);
    } else {
        TCGv_i64 t0 = tcg_temp_new_i64();
        TCGv_i64 t1 = tcg_temp_new_i64();
        TCGv_i64 t2 = tcg_temp_new_i64();

                                        /* arg = abcdefgh */
        tcg_gen_movi_i64(t2, 0x00ff00ff00ff00ffull);
        tcg_gen_shri_i64(t0, arg, 8);   /*  t0 = .abcdefg */
        tcg_gen_and_i64(t1, arg, t2);   /*  t1 = .b.d.f.h */
        tcg_gen_and_i64(t0, t0, t2);    /*  t0 = .a.c.e.g */
        tcg_gen_shli_i64(t1, t1, 8);    /*  t1 = b.d.f.h. */
        tcg_gen_or_i64(ret, t0, t1);    /* ret = badcfehg */

        tcg_gen_movi_i64(t2, 0x0000ffff0000ffffull);
        tcg_gen_shri_i64(t0, ret, 16);  /*  t0 = ..badcfe */
        tcg_gen_and_i64(t1, ret, t2);   /*  t1 = ..dc..hg */
        tcg_gen_and_i64(t0, t0, t2);    /*  t0 = ..ba..fe */
        tcg_gen_shli_i64(t1, t1, 16);   /*  t1 = dc..hg.. */
        tcg_gen_or_i64(ret, t0, t1);    /* ret = dcbahgfe */

        tcg_gen_shri_i64(t0, ret, 32);  /*  t0 = ....dcba */
        tcg_gen_shli_i64(t1, ret, 32);  /*  t1 = hgfe.... */
        tcg_gen_or_i64(ret, t0, t1);    /* ret = hgfedcba */

        tcg_temp_free_i64(t0);
        tcg_temp_free_i64(t1);
        tcg_temp_free_i64(t2);
    }
}

void tcg_gen_hswap_i64(TCGv_i64 ret, TCGv_i64 arg)
{
    uint64_t m = 0x0000ffff0000ffffull;
    TCGv_i64 t0 = tcg_temp_new_i64();
    TCGv_i64 t1 = tcg_temp_new_i64();

    /* See include/qemu/bitops.h, hswap64. */
    tcg_gen_rotli_i64(t1, arg, 32);
    tcg_gen_andi_i64(t0, t1, m);
    tcg_gen_shli_i64(t0, t0, 16);
    tcg_gen_shri_i64(t1, t1, 16);
    tcg_gen_andi_i64(t1, t1, m);
    tcg_gen_or_i64(ret, t0, t1);

    tcg_temp_free_i64(t0);
    tcg_temp_free_i64(t1);
}

void tcg_gen_wswap_i64(TCGv_i64 ret, TCGv_i64 arg)
{
    /* Swapping 2 32-bit elements is a rotate. */
    tcg_gen_rotli_i64(ret, arg, 32);
}

void tcg_gen_not_i64(TCGv_i64 ret, TCGv_i64 arg)
{
    if (TCG_TARGET_REG_BITS == 32) {
        tcg_gen_not_i32(TCGV_LOW(ret), TCGV_LOW(arg));
        tcg_gen_not_i32(TCGV_HIGH(ret), TCGV_HIGH(arg));
    } else if (TCG_TARGET_HAS_not_i64) {
        tcg_gen_op2_i64(INDEX_op_not_i64, ret, arg);
    } else {
        tcg_gen_xori_i64(ret, arg, -1);
    }
}

void tcg_gen_andc_i64(TCGv_i64 ret, TCGv_i64 arg1, TCGv_i64 arg2)
{
    if (TCG_TARGET_REG_BITS == 32) {
        tcg_gen_andc_i32(TCGV_LOW(ret), TCGV_LOW(arg1), TCGV_LOW(arg2));
        tcg_gen_andc_i32(TCGV_HIGH(ret), TCGV_HIGH(arg1), TCGV_HIGH(arg2));
    } else if (TCG_TARGET_HAS_andc_i64) {
        tcg_gen_op3_i64(INDEX_op_andc_i64, ret, arg1, arg2);
    } else {
        TCGv_i64 t0 = tcg_temp_new_i64();
        tcg_gen_not_i64(t0, arg2);
        tcg_gen_and_i64(ret, arg1, t0);
        tcg_temp_free_i64(t0);
    }
}

void tcg_gen_eqv_i64(TCGv_i64 ret, TCGv_i64 arg1, TCGv_i64 arg2)
{
    if (TCG_TARGET_REG_BITS == 32) {
        tcg_gen_eqv_i32(TCGV_LOW(ret), TCGV_LOW(arg1), TCGV_LOW(arg2));
        tcg_gen_eqv_i32(TCGV_HIGH(ret), TCGV_HIGH(arg1), TCGV_HIGH(arg2));
    } else if (TCG_TARGET_HAS_eqv_i64) {
        tcg_gen_op3_i64(INDEX_op_eqv_i64, ret, arg1, arg2);
    } else {
        tcg_gen_xor_i64(ret, arg1, arg2);
        tcg_gen_not_i64(ret, ret);
    }
}

void tcg_gen_nand_i64(TCGv_i64 ret, TCGv_i64 arg1, TCGv_i64 arg2)
{
    if (TCG_TARGET_REG_BITS == 32) {
        tcg_gen_nand_i32(TCGV_LOW(ret), TCGV_LOW(arg1), TCGV_LOW(arg2));
        tcg_gen_nand_i32(TCGV_HIGH(ret), TCGV_HIGH(arg1), TCGV_HIGH(arg2));
    } else if (TCG_TARGET_HAS_nand_i64) {
        tcg_gen_op3_i64(INDEX_op_nand_i64, ret, arg1, arg2);
    } else {
        tcg_gen_and_i64(ret, arg1, arg2);
        tcg_gen_not_i64(ret, ret);
    }
}

void tcg_gen_nor_i64(TCGv_i64 ret, TCGv_i64 arg1, TCGv_i64 arg2)
{
    if (TCG_TARGET_REG_BITS == 32) {
        tcg_gen_nor_i32(TCGV_LOW(ret), TCGV_LOW(arg1), TCGV_LOW(arg2));
        tcg_gen_nor_i32(TCGV_HIGH(ret), TCGV_HIGH(arg1), TCGV_HIGH(arg2));
    } else if (TCG_TARGET_HAS_nor_i64) {
        tcg_gen_op3_i64(INDEX_op_nor_i64, ret, arg1, arg2);
    } else {
        tcg_gen_or_i64(ret, arg1, arg2);
        tcg_gen_not_i64(ret, ret);
    }
}

void tcg_gen_orc_i64(TCGv_i64 ret, TCGv_i64 arg1, TCGv_i64 arg2)
{
    if (TCG_TARGET_REG_BITS == 32) {
        tcg_gen_orc_i32(TCGV_LOW(ret), TCGV_LOW(arg1), TCGV_LOW(arg2));
        tcg_gen_orc_i32(TCGV_HIGH(ret), TCGV_HIGH(arg1), TCGV_HIGH(arg2));
    } else if (TCG_TARGET_HAS_orc_i64) {
        tcg_gen_op3_i64(INDEX_op_orc_i64, ret, arg1, arg2);
    } else {
        TCGv_i64 t0 = tcg_temp_new_i64();
        tcg_gen_not_i64(t0, arg2);
        tcg_gen_or_i64(ret, arg1, t0);
        tcg_temp_free_i64(t0);
    }
}

void tcg_gen_clz_i64(TCGv_i64 ret, TCGv_i64 arg1, TCGv_i64 arg2)
{
    if (TCG_TARGET_HAS_clz_i64) {
        tcg_gen_op3_i64(INDEX_op_clz_i64, ret, arg1, arg2);
    } else {
        gen_helper_clz_i64(ret, arg1, arg2);
    }
}

void tcg_gen_clzi_i64(TCGv_i64 ret, TCGv_i64 arg1, uint64_t arg2)
{
    if (TCG_TARGET_REG_BITS == 32
        && TCG_TARGET_HAS_clz_i32
        && arg2 <= 0xffffffffu) {
        TCGv_i32 t = tcg_temp_new_i32();
        tcg_gen_clzi_i32(t, TCGV_LOW(arg1), arg2 - 32);
        tcg_gen_addi_i32(t, t, 32);
        tcg_gen_clz_i32(TCGV_LOW(ret), TCGV_HIGH(arg1), t);
        tcg_gen_movi_i32(TCGV_HIGH(ret), 0);
        tcg_temp_free_i32(t);
    } else {
        TCGv_i64 t0 = tcg_const_i64(arg2);
        tcg_gen_clz_i64(ret, arg1, t0);
        tcg_temp_free_i64(t0);
    }
}

void tcg_gen_ctz_i64(TCGv_i64 ret, TCGv_i64 arg1, TCGv_i64 arg2)
{
    if (TCG_TARGET_HAS_ctz_i64) {
        tcg_gen_op3_i64(INDEX_op_ctz_i64, ret, arg1, arg2);
    } else if (TCG_TARGET_HAS_ctpop_i64 || TCG_TARGET_HAS_clz_i64) {
        TCGv_i64 z, t = tcg_temp_new_i64();

        if (TCG_TARGET_HAS_ctpop_i64) {
            tcg_gen_subi_i64(t, arg1, 1);
            tcg_gen_andc_i64(t, t, arg1);
            tcg_gen_ctpop_i64(t, t);
        } else {
            /* Since all non-x86 hosts have clz(0) == 64, don't fight it.  */
            tcg_gen_neg_i64(t, arg1);
            tcg_gen_and_i64(t, t, arg1);
            tcg_gen_clzi_i64(t, t, 64);
            tcg_gen_xori_i64(t, t, 63);
        }
        z = tcg_constant_i64(0);
        tcg_gen_movcond_i64(TCG_COND_EQ, ret, arg1, z, arg2, t);
        tcg_temp_free_i64(t);
        tcg_temp_free_i64(z);
    } else {
        gen_helper_ctz_i64(ret, arg1, arg2);
    }
}

void tcg_gen_ctzi_i64(TCGv_i64 ret, TCGv_i64 arg1, uint64_t arg2)
{
    if (TCG_TARGET_REG_BITS == 32
        && TCG_TARGET_HAS_ctz_i32
        && arg2 <= 0xffffffffu) {
        TCGv_i32 t32 = tcg_temp_new_i32();
        tcg_gen_ctzi_i32(t32, TCGV_HIGH(arg1), arg2 - 32);
        tcg_gen_addi_i32(t32, t32, 32);
        tcg_gen_ctz_i32(TCGV_LOW(ret), TCGV_LOW(arg1), t32);
        tcg_gen_movi_i32(TCGV_HIGH(ret), 0);
        tcg_temp_free_i32(t32);
    } else if (!TCG_TARGET_HAS_ctz_i64
               && TCG_TARGET_HAS_ctpop_i64
               && arg2 == 64) {
        /* This equivalence has the advantage of not requiring a fixup.  */
        TCGv_i64 t = tcg_temp_new_i64();
        tcg_gen_subi_i64(t, arg1, 1);
        tcg_gen_andc_i64(t, t, arg1);
        tcg_gen_ctpop_i64(ret, t);
        tcg_temp_free_i64(t);
    } else {
        TCGv_i64 t0 = tcg_const_i64(arg2);
        tcg_gen_ctz_i64(ret, arg1, t0);
        tcg_temp_free_i64(t0);
    }
}

void tcg_gen_clrsb_i64(TCGv_i64 ret, TCGv_i64 arg)
{
    if (TCG_TARGET_HAS_clz_i64 || TCG_TARGET_HAS_clz_i32) {
        TCGv_i64 t = tcg_temp_new_i64();
        tcg_gen_sari_i64(t, arg, 63);
        tcg_gen_xor_i64(t, t, arg);
        tcg_gen_clzi_i64(t, t, 64);
        tcg_gen_subi_i64(ret, t, 1);
        tcg_temp_free_i64(t);
    } else {
        gen_helper_clrsb_i64(ret, arg);
    }
}

void tcg_gen_ctpop_i64(TCGv_i64 ret, TCGv_i64 arg1)
{
    if (TCG_TARGET_HAS_ctpop_i64) {
        tcg_gen_op2_i64(INDEX_op_ctpop_i64, ret, arg1);
    } else if (TCG_TARGET_REG_BITS == 32 && TCG_TARGET_HAS_ctpop_i32) {
        tcg_gen_ctpop_i32(TCGV_HIGH(ret), TCGV_HIGH(arg1));
        tcg_gen_ctpop_i32(TCGV_LOW(ret), TCGV_LOW(arg1));
        tcg_gen_add_i32(TCGV_LOW(ret), TCGV_LOW(ret), TCGV_HIGH(ret));
        tcg_gen_movi_i32(TCGV_HIGH(ret), 0);
    } else {
        gen_helper_ctpop_i64(ret, arg1);
    }
}

void tcg_gen_rotl_i64(TCGv_i64 ret, TCGv_i64 arg1, TCGv_i64 arg2)
{
    if (TCG_TARGET_HAS_rot_i64) {
        tcg_gen_op3_i64(INDEX_op_rotl_i64, ret, arg1, arg2);
    } else {
        TCGv_i64 t0, t1;
        t0 = tcg_temp_new_i64();
        t1 = tcg_temp_new_i64();
        tcg_gen_shl_i64(t0, arg1, arg2);
        tcg_gen_subfi_i64(t1, 64, arg2);
        tcg_gen_shr_i64(t1, arg1, t1);
        tcg_gen_or_i64(ret, t0, t1);
        tcg_temp_free_i64(t0);
        tcg_temp_free_i64(t1);
    }
}

void tcg_gen_rotli_i64(TCGv_i64 ret, TCGv_i64 arg1, int64_t arg2)
{
    tcg_debug_assert(arg2 >= 0 && arg2 < 64);
    /* some cases can be optimized here */
    if (arg2 == 0) {
        tcg_gen_mov_i64(ret, arg1);
    } else if (TCG_TARGET_HAS_rot_i64) {
        tcg_gen_rotl_i64(ret, arg1, tcg_constant_i64(arg2));
    } else {
        TCGv_i64 t0, t1;
        t0 = tcg_temp_new_i64();
        t1 = tcg_temp_new_i64();
        tcg_gen_shli_i64(t0, arg1, arg2);
        tcg_gen_shri_i64(t1, arg1, 64 - arg2);
        tcg_gen_or_i64(ret, t0, t1);
        tcg_temp_free_i64(t0);
        tcg_temp_free_i64(t1);
    }
}

void tcg_gen_rotr_i64(TCGv_i64 ret, TCGv_i64 arg1, TCGv_i64 arg2)
{
    if (TCG_TARGET_HAS_rot_i64) {
        tcg_gen_op3_i64(INDEX_op_rotr_i64, ret, arg1, arg2);
    } else {
        TCGv_i64 t0, t1;
        t0 = tcg_temp_new_i64();
        t1 = tcg_temp_new_i64();
        tcg_gen_shr_i64(t0, arg1, arg2);
        tcg_gen_subfi_i64(t1, 64, arg2);
        tcg_gen_shl_i64(t1, arg1, t1);
        tcg_gen_or_i64(ret, t0, t1);
        tcg_temp_free_i64(t0);
        tcg_temp_free_i64(t1);
    }
}

void tcg_gen_rotri_i64(TCGv_i64 ret, TCGv_i64 arg1, int64_t arg2)
{
    tcg_debug_assert(arg2 >= 0 && arg2 < 64);
    /* some cases can be optimized here */
    if (arg2 == 0) {
        tcg_gen_mov_i64(ret, arg1);
    } else {
        tcg_gen_rotli_i64(ret, arg1, 64 - arg2);
    }
}

void tcg_gen_deposit_i64(TCGv_i64 ret, TCGv_i64 arg1, TCGv_i64 arg2,
                         unsigned int ofs, unsigned int len)
{
    uint64_t mask;
    TCGv_i64 t1;

    tcg_debug_assert(ofs < 64);
    tcg_debug_assert(len > 0);
    tcg_debug_assert(len <= 64);
    tcg_debug_assert(ofs + len <= 64);

    if (len == 64) {
        tcg_gen_mov_i64(ret, arg2);
        return;
    }
    if (TCG_TARGET_HAS_deposit_i64 && TCG_TARGET_deposit_i64_valid(ofs, len)) {
        tcg_gen_op5ii_i64(INDEX_op_deposit_i64, ret, arg1, arg2, ofs, len);
        return;
    }

    if (TCG_TARGET_REG_BITS == 32) {
        if (ofs >= 32) {
            tcg_gen_deposit_i32(TCGV_HIGH(ret), TCGV_HIGH(arg1),
                                TCGV_LOW(arg2), ofs - 32, len);
            tcg_gen_mov_i32(TCGV_LOW(ret), TCGV_LOW(arg1));
            return;
        }
        if (ofs + len <= 32) {
            tcg_gen_deposit_i32(TCGV_LOW(ret), TCGV_LOW(arg1),
                                TCGV_LOW(arg2), ofs, len);
            tcg_gen_mov_i32(TCGV_HIGH(ret), TCGV_HIGH(arg1));
            return;
        }
    }

    t1 = tcg_temp_new_i64();

    if (TCG_TARGET_HAS_extract2_i64) {
        if (ofs + len == 64) {
            tcg_gen_shli_i64(t1, arg1, len);
            tcg_gen_extract2_i64(ret, t1, arg2, len);
            goto done;
        }
        if (ofs == 0) {
            tcg_gen_extract2_i64(ret, arg1, arg2, len);
            tcg_gen_rotli_i64(ret, ret, len);
            goto done;
        }
    }

    mask = (1ull << len) - 1;
    if (ofs + len < 64) {
        tcg_gen_andi_i64(t1, arg2, mask);
        tcg_gen_shli_i64(t1, t1, ofs);
    } else {
        tcg_gen_shli_i64(t1, arg2, ofs);
    }
    tcg_gen_andi_i64(ret, arg1, ~(mask << ofs));
    tcg_gen_or_i64(ret, ret, t1);
 done:
    tcg_temp_free_i64(t1);
}

void tcg_gen_deposit_z_i64(TCGv_i64 ret, TCGv_i64 arg,
                           unsigned int ofs, unsigned int len)
{
    tcg_debug_assert(ofs < 64);
    tcg_debug_assert(len > 0);
    tcg_debug_assert(len <= 64);
    tcg_debug_assert(ofs + len <= 64);

    if (ofs + len == 64) {
        tcg_gen_shli_i64(ret, arg, ofs);
    } else if (ofs == 0) {
        tcg_gen_andi_i64(ret, arg, (1ull << len) - 1);
    } else if (TCG_TARGET_HAS_deposit_i64
               && TCG_TARGET_deposit_i64_valid(ofs, len)) {
        TCGv_i64 zero = tcg_constant_i64(0);
        tcg_gen_op5ii_i64(INDEX_op_deposit_i64, ret, zero, arg, ofs, len);
    } else {
        if (TCG_TARGET_REG_BITS == 32) {
            if (ofs >= 32) {
                tcg_gen_deposit_z_i32(TCGV_HIGH(ret), TCGV_LOW(arg),
                                      ofs - 32, len);
                tcg_gen_movi_i32(TCGV_LOW(ret), 0);
                return;
            }
            if (ofs + len <= 32) {
                tcg_gen_deposit_z_i32(TCGV_LOW(ret), TCGV_LOW(arg), ofs, len);
                tcg_gen_movi_i32(TCGV_HIGH(ret), 0);
                return;
            }
        }
        /* To help two-operand hosts we prefer to zero-extend first,
           which allows ARG to stay live.  */
        switch (len) {
        case 32:
            if (TCG_TARGET_HAS_ext32u_i64) {
                tcg_gen_ext32u_i64(ret, arg);
                tcg_gen_shli_i64(ret, ret, ofs);
                return;
            }
            break;
        case 16:
            if (TCG_TARGET_HAS_ext16u_i64) {
                tcg_gen_ext16u_i64(ret, arg);
                tcg_gen_shli_i64(ret, ret, ofs);
                return;
            }
            break;
        case 8:
            if (TCG_TARGET_HAS_ext8u_i64) {
                tcg_gen_ext8u_i64(ret, arg);
                tcg_gen_shli_i64(ret, ret, ofs);
                return;
            }
            break;
        }
        /* Otherwise prefer zero-extension over AND for code size.  */
        switch (ofs + len) {
        case 32:
            if (TCG_TARGET_HAS_ext32u_i64) {
                tcg_gen_shli_i64(ret, arg, ofs);
                tcg_gen_ext32u_i64(ret, ret);
                return;
            }
            break;
        case 16:
            if (TCG_TARGET_HAS_ext16u_i64) {
                tcg_gen_shli_i64(ret, arg, ofs);
                tcg_gen_ext16u_i64(ret, ret);
                return;
            }
            break;
        case 8:
            if (TCG_TARGET_HAS_ext8u_i64) {
                tcg_gen_shli_i64(ret, arg, ofs);
                tcg_gen_ext8u_i64(ret, ret);
                return;
            }
            break;
        }
        tcg_gen_andi_i64(ret, arg, (1ull << len) - 1);
        tcg_gen_shli_i64(ret, ret, ofs);
    }
}

void tcg_gen_extract_i64(TCGv_i64 ret, TCGv_i64 arg,
                         unsigned int ofs, unsigned int len)
{
    tcg_debug_assert(ofs < 64);
    tcg_debug_assert(len > 0);
    tcg_debug_assert(len <= 64);
    tcg_debug_assert(ofs + len <= 64);

    /* Canonicalize certain special cases, even if extract is supported.  */
    if (ofs + len == 64) {
        tcg_gen_shri_i64(ret, arg, 64 - len);
        return;
    }
    if (ofs == 0) {
        tcg_gen_andi_i64(ret, arg, (1ull << len) - 1);
        return;
    }

    if (TCG_TARGET_REG_BITS == 32) {
        /* Look for a 32-bit extract within one of the two words.  */
        if (ofs >= 32) {
            tcg_gen_extract_i32(TCGV_LOW(ret), TCGV_HIGH(arg), ofs - 32, len);
            tcg_gen_movi_i32(TCGV_HIGH(ret), 0);
            return;
        }
        if (ofs + len <= 32) {
            tcg_gen_extract_i32(TCGV_LOW(ret), TCGV_LOW(arg), ofs, len);
            tcg_gen_movi_i32(TCGV_HIGH(ret), 0);
            return;
        }
        /* The field is split across two words.  One double-word
           shift is better than two double-word shifts.  */
        goto do_shift_and;
    }

    if (TCG_TARGET_HAS_extract_i64
        && TCG_TARGET_extract_i64_valid(ofs, len)) {
        tcg_gen_op4ii_i64(INDEX_op_extract_i64, ret, arg, ofs, len);
        return;
    }

    /* Assume that zero-extension, if available, is cheaper than a shift.  */
    switch (ofs + len) {
    case 32:
        if (TCG_TARGET_HAS_ext32u_i64) {
            tcg_gen_ext32u_i64(ret, arg);
            tcg_gen_shri_i64(ret, ret, ofs);
            return;
        }
        break;
    case 16:
        if (TCG_TARGET_HAS_ext16u_i64) {
            tcg_gen_ext16u_i64(ret, arg);
            tcg_gen_shri_i64(ret, ret, ofs);
            return;
        }
        break;
    case 8:
        if (TCG_TARGET_HAS_ext8u_i64) {
            tcg_gen_ext8u_i64(ret, arg);
            tcg_gen_shri_i64(ret, ret, ofs);
            return;
        }
        break;
    }

    /* ??? Ideally we'd know what values are available for immediate AND.
       Assume that 8 bits are available, plus the special cases of 16 and 32,
       so that we get ext8u, ext16u, and ext32u.  */
    switch (len) {
    case 1 ... 8: case 16: case 32:
    do_shift_and:
        tcg_gen_shri_i64(ret, arg, ofs);
        tcg_gen_andi_i64(ret, ret, (1ull << len) - 1);
        break;
    default:
        tcg_gen_shli_i64(ret, arg, 64 - len - ofs);
        tcg_gen_shri_i64(ret, ret, 64 - len);
        break;
    }
}

void tcg_gen_sextract_i64(TCGv_i64 ret, TCGv_i64 arg,
                          unsigned int ofs, unsigned int len)
{
    tcg_debug_assert(ofs < 64);
    tcg_debug_assert(len > 0);
    tcg_debug_assert(len <= 64);
    tcg_debug_assert(ofs + len <= 64);

    /* Canonicalize certain special cases, even if sextract is supported.  */
    if (ofs + len == 64) {
        tcg_gen_sari_i64(ret, arg, 64 - len);
        return;
    }
    if (ofs == 0) {
        switch (len) {
        case 32:
            tcg_gen_ext32s_i64(ret, arg);
            return;
        case 16:
            tcg_gen_ext16s_i64(ret, arg);
            return;
        case 8:
            tcg_gen_ext8s_i64(ret, arg);
            return;
        }
    }

    if (TCG_TARGET_REG_BITS == 32) {
        /* Look for a 32-bit extract within one of the two words.  */
        if (ofs >= 32) {
            tcg_gen_sextract_i32(TCGV_LOW(ret), TCGV_HIGH(arg), ofs - 32, len);
        } else if (ofs + len <= 32) {
            tcg_gen_sextract_i32(TCGV_LOW(ret), TCGV_LOW(arg), ofs, len);
        } else if (ofs == 0) {
            tcg_gen_mov_i32(TCGV_LOW(ret), TCGV_LOW(arg));
            tcg_gen_sextract_i32(TCGV_HIGH(ret), TCGV_HIGH(arg), 0, len - 32);
            return;
        } else if (len > 32) {
            TCGv_i32 t = tcg_temp_new_i32();
            /* Extract the bits for the high word normally.  */
            tcg_gen_sextract_i32(t, TCGV_HIGH(arg), ofs + 32, len - 32);
            /* Shift the field down for the low part.  */
            tcg_gen_shri_i64(ret, arg, ofs);
            /* Overwrite the shift into the high part.  */
            tcg_gen_mov_i32(TCGV_HIGH(ret), t);
            tcg_temp_free_i32(t);
            return;
        } else {
            /* Shift the field down for the low part, such that the
               field sits at the MSB.  */
            tcg_gen_shri_i64(ret, arg, ofs + len - 32);
            /* Shift the field down from the MSB, sign extending.  */
            tcg_gen_sari_i32(TCGV_LOW(ret), TCGV_LOW(ret), 32 - len);
        }
        /* Sign-extend the field from 32 bits.  */
        tcg_gen_sari_i32(TCGV_HIGH(ret), TCGV_LOW(ret), 31);
        return;
    }

    if (TCG_TARGET_HAS_sextract_i64
        && TCG_TARGET_extract_i64_valid(ofs, len)) {
        tcg_gen_op4ii_i64(INDEX_op_sextract_i64, ret, arg, ofs, len);
        return;
    }

    /* Assume that sign-extension, if available, is cheaper than a shift.  */
    switch (ofs + len) {
    case 32:
        if (TCG_TARGET_HAS_ext32s_i64) {
            tcg_gen_ext32s_i64(ret, arg);
            tcg_gen_sari_i64(ret, ret, ofs);
            return;
        }
        break;
    case 16:
        if (TCG_TARGET_HAS_ext16s_i64) {
            tcg_gen_ext16s_i64(ret, arg);
            tcg_gen_sari_i64(ret, ret, ofs);
            return;
        }
        break;
    case 8:
        if (TCG_TARGET_HAS_ext8s_i64) {
            tcg_gen_ext8s_i64(ret, arg);
            tcg_gen_sari_i64(ret, ret, ofs);
            return;
        }
        break;
    }
    switch (len) {
    case 32:
        if (TCG_TARGET_HAS_ext32s_i64) {
            tcg_gen_shri_i64(ret, arg, ofs);
            tcg_gen_ext32s_i64(ret, ret);
            return;
        }
        break;
    case 16:
        if (TCG_TARGET_HAS_ext16s_i64) {
            tcg_gen_shri_i64(ret, arg, ofs);
            tcg_gen_ext16s_i64(ret, ret);
            return;
        }
        break;
    case 8:
        if (TCG_TARGET_HAS_ext8s_i64) {
            tcg_gen_shri_i64(ret, arg, ofs);
            tcg_gen_ext8s_i64(ret, ret);
            return;
        }
        break;
    }
    tcg_gen_shli_i64(ret, arg, 64 - len - ofs);
    tcg_gen_sari_i64(ret, ret, 64 - len);
}

/*
 * Extract 64 bits from a 128-bit input, ah:al, starting from ofs.
 * Unlike tcg_gen_extract_i64 above, len is fixed at 64.
 */
void tcg_gen_extract2_i64(TCGv_i64 ret, TCGv_i64 al, TCGv_i64 ah,
                          unsigned int ofs)
{
    tcg_debug_assert(ofs <= 64);
    if (ofs == 0) {
        tcg_gen_mov_i64(ret, al);
    } else if (ofs == 64) {
        tcg_gen_mov_i64(ret, ah);
    } else if (al == ah) {
        tcg_gen_rotri_i64(ret, al, ofs);
    } else if (TCG_TARGET_HAS_extract2_i64) {
        tcg_gen_op4i_i64(INDEX_op_extract2_i64, ret, al, ah, ofs);
    } else {
        TCGv_i64 t0 = tcg_temp_new_i64();
        tcg_gen_shri_i64(t0, al, ofs);
        tcg_gen_deposit_i64(ret, t0, ah, 64 - ofs, ofs);
        tcg_temp_free_i64(t0);
    }
}

void tcg_gen_movcond_i64(TCGCond cond, TCGv_i64 ret, TCGv_i64 c1,
                         TCGv_i64 c2, TCGv_i64 v1, TCGv_i64 v2)
{
    if (cond == TCG_COND_ALWAYS) {
        tcg_gen_mov_i64(ret, v1);
    } else if (cond == TCG_COND_NEVER) {
        tcg_gen_mov_i64(ret, v2);
    } else if (TCG_TARGET_REG_BITS == 32) {
        TCGv_i32 t0 = tcg_temp_new_i32();
        TCGv_i32 t1 = tcg_temp_new_i32();
        tcg_gen_op6i_i32(INDEX_op_setcond2_i32, t0,
                         TCGV_LOW(c1), TCGV_HIGH(c1),
                         TCGV_LOW(c2), TCGV_HIGH(c2), cond);

        if (TCG_TARGET_HAS_movcond_i32) {
            tcg_gen_movi_i32(t1, 0);
            tcg_gen_movcond_i32(TCG_COND_NE, TCGV_LOW(ret), t0, t1,
                                TCGV_LOW(v1), TCGV_LOW(v2));
            tcg_gen_movcond_i32(TCG_COND_NE, TCGV_HIGH(ret), t0, t1,
                                TCGV_HIGH(v1), TCGV_HIGH(v2));
        } else {
            tcg_gen_neg_i32(t0, t0);

            tcg_gen_and_i32(t1, TCGV_LOW(v1), t0);
            tcg_gen_andc_i32(TCGV_LOW(ret), TCGV_LOW(v2), t0);
            tcg_gen_or_i32(TCGV_LOW(ret), TCGV_LOW(ret), t1);

            tcg_gen_and_i32(t1, TCGV_HIGH(v1), t0);
            tcg_gen_andc_i32(TCGV_HIGH(ret), TCGV_HIGH(v2), t0);
            tcg_gen_or_i32(TCGV_HIGH(ret), TCGV_HIGH(ret), t1);
        }
        tcg_temp_free_i32(t0);
        tcg_temp_free_i32(t1);
    } else if (TCG_TARGET_HAS_movcond_i64) {
        tcg_gen_op6i_i64(INDEX_op_movcond_i64, ret, c1, c2, v1, v2, cond);
    } else {
        TCGv_i64 t0 = tcg_temp_new_i64();
        TCGv_i64 t1 = tcg_temp_new_i64();
        tcg_gen_setcond_i64(cond, t0, c1, c2);
        tcg_gen_neg_i64(t0, t0);
        tcg_gen_and_i64(t1, v1, t0);
        tcg_gen_andc_i64(ret, v2, t0);
        tcg_gen_or_i64(ret, ret, t1);
        tcg_temp_free_i64(t0);
        tcg_temp_free_i64(t1);
    }
}

void tcg_gen_add2_i64(TCGv_i64 rl, TCGv_i64 rh, TCGv_i64 al,
                      TCGv_i64 ah, TCGv_i64 bl, TCGv_i64 bh)
{
    if (TCG_TARGET_HAS_add2_i64) {
        tcg_gen_op6_i64(INDEX_op_add2_i64, rl, rh, al, ah, bl, bh);
    } else {
        TCGv_i64 t0 = tcg_temp_new_i64();
        TCGv_i64 t1 = tcg_temp_new_i64();
        tcg_gen_add_i64(t0, al, bl);
        tcg_gen_setcond_i64(TCG_COND_LTU, t1, t0, al);
        tcg_gen_add_i64(rh, ah, bh);
        tcg_gen_add_i64(rh, rh, t1);
        tcg_gen_mov_i64(rl, t0);
        tcg_temp_free_i64(t0);
        tcg_temp_free_i64(t1);
    }
}

void tcg_gen_sub2_i64(TCGv_i64 rl, TCGv_i64 rh, TCGv_i64 al,
                      TCGv_i64 ah, TCGv_i64 bl, TCGv_i64 bh)
{
    if (TCG_TARGET_HAS_sub2_i64) {
        tcg_gen_op6_i64(INDEX_op_sub2_i64, rl, rh, al, ah, bl, bh);
    } else {
        TCGv_i64 t0 = tcg_temp_new_i64();
        TCGv_i64 t1 = tcg_temp_new_i64();
        tcg_gen_sub_i64(t0, al, bl);
        tcg_gen_setcond_i64(TCG_COND_LTU, t1, al, bl);
        tcg_gen_sub_i64(rh, ah, bh);
        tcg_gen_sub_i64(rh, rh, t1);
        tcg_gen_mov_i64(rl, t0);
        tcg_temp_free_i64(t0);
        tcg_temp_free_i64(t1);
    }
}

void tcg_gen_mulu2_i64(TCGv_i64 rl, TCGv_i64 rh, TCGv_i64 arg1, TCGv_i64 arg2)
{
    if (TCG_TARGET_HAS_mulu2_i64) {
        tcg_gen_op4_i64(INDEX_op_mulu2_i64, rl, rh, arg1, arg2);
    } else if (TCG_TARGET_HAS_muluh_i64) {
        TCGv_i64 t = tcg_temp_new_i64();
        tcg_gen_op3_i64(INDEX_op_mul_i64, t, arg1, arg2);
        tcg_gen_op3_i64(INDEX_op_muluh_i64, rh, arg1, arg2);
        tcg_gen_mov_i64(rl, t);
        tcg_temp_free_i64(t);
    } else {
        TCGv_i64 t0 = tcg_temp_new_i64();
        tcg_gen_mul_i64(t0, arg1, arg2);
        gen_helper_muluh_i64(rh, arg1, arg2);
        tcg_gen_mov_i64(rl, t0);
        tcg_temp_free_i64(t0);
    }
}

void tcg_gen_muls2_i64(TCGv_i64 rl, TCGv_i64 rh, TCGv_i64 arg1, TCGv_i64 arg2)
{
    if (TCG_TARGET_HAS_muls2_i64) {
        tcg_gen_op4_i64(INDEX_op_muls2_i64, rl, rh, arg1, arg2);
    } else if (TCG_TARGET_HAS_mulsh_i64) {
        TCGv_i64 t = tcg_temp_new_i64();
        tcg_gen_op3_i64(INDEX_op_mul_i64, t, arg1, arg2);
        tcg_gen_op3_i64(INDEX_op_mulsh_i64, rh, arg1, arg2);
        tcg_gen_mov_i64(rl, t);
        tcg_temp_free_i64(t);
    } else if (TCG_TARGET_HAS_mulu2_i64 || TCG_TARGET_HAS_muluh_i64) {
        TCGv_i64 t0 = tcg_temp_new_i64();
        TCGv_i64 t1 = tcg_temp_new_i64();
        TCGv_i64 t2 = tcg_temp_new_i64();
        TCGv_i64 t3 = tcg_temp_new_i64();
        tcg_gen_mulu2_i64(t0, t1, arg1, arg2);
        /* Adjust for negative inputs.  */
        tcg_gen_sari_i64(t2, arg1, 63);
        tcg_gen_sari_i64(t3, arg2, 63);
        tcg_gen_and_i64(t2, t2, arg2);
        tcg_gen_and_i64(t3, t3, arg1);
        tcg_gen_sub_i64(rh, t1, t2);
        tcg_gen_sub_i64(rh, rh, t3);
        tcg_gen_mov_i64(rl, t0);
        tcg_temp_free_i64(t0);
        tcg_temp_free_i64(t1);
        tcg_temp_free_i64(t2);
        tcg_temp_free_i64(t3);
    } else {
        TCGv_i64 t0 = tcg_temp_new_i64();
        tcg_gen_mul_i64(t0, arg1, arg2);
        gen_helper_mulsh_i64(rh, arg1, arg2);
        tcg_gen_mov_i64(rl, t0);
        tcg_temp_free_i64(t0);
    }
}

void tcg_gen_mulsu2_i64(TCGv_i64 rl, TCGv_i64 rh, TCGv_i64 arg1, TCGv_i64 arg2)
{
    TCGv_i64 t0 = tcg_temp_new_i64();
    TCGv_i64 t1 = tcg_temp_new_i64();
    TCGv_i64 t2 = tcg_temp_new_i64();
    tcg_gen_mulu2_i64(t0, t1, arg1, arg2);
    /* Adjust for negative input for the signed arg1.  */
    tcg_gen_sari_i64(t2, arg1, 63);
    tcg_gen_and_i64(t2, t2, arg2);
    tcg_gen_sub_i64(rh, t1, t2);
    tcg_gen_mov_i64(rl, t0);
    tcg_temp_free_i64(t0);
    tcg_temp_free_i64(t1);
    tcg_temp_free_i64(t2);
}

void tcg_gen_smin_i64(TCGv_i64 ret, TCGv_i64 a, TCGv_i64 b)
{
    tcg_gen_movcond_i64(TCG_COND_LT, ret, a, b, a, b);
}

void tcg_gen_umin_i64(TCGv_i64 ret, TCGv_i64 a, TCGv_i64 b)
{
    tcg_gen_movcond_i64(TCG_COND_LTU, ret, a, b, a, b);
}

void tcg_gen_smax_i64(TCGv_i64 ret, TCGv_i64 a, TCGv_i64 b)
{
    tcg_gen_movcond_i64(TCG_COND_LT, ret, a, b, b, a);
}

void tcg_gen_umax_i64(TCGv_i64 ret, TCGv_i64 a, TCGv_i64 b)
{
    tcg_gen_movcond_i64(TCG_COND_LTU, ret, a, b, b, a);
}

void tcg_gen_abs_i64(TCGv_i64 ret, TCGv_i64 a)
{
    TCGv_i64 t = tcg_temp_new_i64();

    tcg_gen_sari_i64(t, a, 63);
    tcg_gen_xor_i64(ret, a, t);
    tcg_gen_sub_i64(ret, ret, t);
    tcg_temp_free_i64(t);
}

/* Size changing operations.  */

void tcg_gen_extrl_i64_i32(TCGv_i32 ret, TCGv_i64 arg)
{
    if (TCG_TARGET_REG_BITS == 32) {
        tcg_gen_mov_i32(ret, TCGV_LOW(arg));
    } else if (TCG_TARGET_HAS_extrl_i64_i32) {
        tcg_gen_op2(INDEX_op_extrl_i64_i32,
                    tcgv_i32_arg(ret), tcgv_i64_arg(arg));
    } else {
        tcg_gen_mov_i32(ret, (TCGv_i32)arg);
    }
}

void tcg_gen_extrh_i64_i32(TCGv_i32 ret, TCGv_i64 arg)
{
    if (TCG_TARGET_REG_BITS == 32) {
        tcg_gen_mov_i32(ret, TCGV_HIGH(arg));
    } else if (TCG_TARGET_HAS_extrh_i64_i32) {
        tcg_gen_op2(INDEX_op_extrh_i64_i32,
                    tcgv_i32_arg(ret), tcgv_i64_arg(arg));
    } else {
        TCGv_i64 t = tcg_temp_new_i64();
        tcg_gen_shri_i64(t, arg, 32);
        tcg_gen_mov_i32(ret, (TCGv_i32)t);
        tcg_temp_free_i64(t);
    }
}

void tcg_gen_extu_i32_i64(TCGv_i64 ret, TCGv_i32 arg)
{
    if (TCG_TARGET_REG_BITS == 32) {
        tcg_gen_mov_i32(TCGV_LOW(ret), arg);
        tcg_gen_movi_i32(TCGV_HIGH(ret), 0);
    } else {
        tcg_gen_op2(INDEX_op_extu_i32_i64,
                    tcgv_i64_arg(ret), tcgv_i32_arg(arg));
    }
}

void tcg_gen_ext_i32_i64(TCGv_i64 ret, TCGv_i32 arg)
{
    if (TCG_TARGET_REG_BITS == 32) {
        tcg_gen_mov_i32(TCGV_LOW(ret), arg);
        tcg_gen_sari_i32(TCGV_HIGH(ret), TCGV_LOW(ret), 31);
    } else {
        tcg_gen_op2(INDEX_op_ext_i32_i64,
                    tcgv_i64_arg(ret), tcgv_i32_arg(arg));
    }
}

void tcg_gen_concat_i32_i64(TCGv_i64 dest, TCGv_i32 low, TCGv_i32 high)
{
    TCGv_i64 tmp;

    if (TCG_TARGET_REG_BITS == 32) {
        tcg_gen_mov_i32(TCGV_LOW(dest), low);
        tcg_gen_mov_i32(TCGV_HIGH(dest), high);
        return;
    }

    tmp = tcg_temp_new_i64();
    /* These extensions are only needed for type correctness.
       We may be able to do better given target specific information.  */
    tcg_gen_extu_i32_i64(tmp, high);
    tcg_gen_extu_i32_i64(dest, low);
    /* If deposit is available, use it.  Otherwise use the extra
       knowledge that we have of the zero-extensions above.  */
    if (TCG_TARGET_HAS_deposit_i64 && TCG_TARGET_deposit_i64_valid(32, 32)) {
        tcg_gen_deposit_i64(dest, dest, tmp, 32, 32);
    } else {
        tcg_gen_shli_i64(tmp, tmp, 32);
        tcg_gen_or_i64(dest, dest, tmp);
    }
    tcg_temp_free_i64(tmp);
}

void tcg_gen_extr_i64_i32(TCGv_i32 lo, TCGv_i32 hi, TCGv_i64 arg)
{
    if (TCG_TARGET_REG_BITS == 32) {
        tcg_gen_mov_i32(lo, TCGV_LOW(arg));
        tcg_gen_mov_i32(hi, TCGV_HIGH(arg));
    } else {
        tcg_gen_extrl_i64_i32(lo, arg);
        tcg_gen_extrh_i64_i32(hi, arg);
    }
}

void tcg_gen_extr32_i64(TCGv_i64 lo, TCGv_i64 hi, TCGv_i64 arg)
{
    tcg_gen_ext32u_i64(lo, arg);
    tcg_gen_shri_i64(hi, arg, 32);
}

void tcg_gen_extr_i128_i64(TCGv_i64 lo, TCGv_i64 hi, TCGv_i128 arg)
{
    tcg_gen_mov_i64(lo, TCGV128_LOW(arg));
    tcg_gen_mov_i64(hi, TCGV128_HIGH(arg));
}

void tcg_gen_concat_i64_i128(TCGv_i128 ret, TCGv_i64 lo, TCGv_i64 hi)
{
    tcg_gen_mov_i64(TCGV128_LOW(ret), lo);
    tcg_gen_mov_i64(TCGV128_HIGH(ret), hi);
}

void tcg_gen_mov_i128(TCGv_i128 dst, TCGv_i128 src)
{
    if (dst != src) {
        tcg_gen_mov_i64(TCGV128_LOW(dst), TCGV128_LOW(src));
        tcg_gen_mov_i64(TCGV128_HIGH(dst), TCGV128_HIGH(src));
    }
}

/* QEMU specific operations.  */

void tcg_gen_exit_tb(const TranslationBlock *tb, unsigned idx)
{
    /*
     * Let the jit code return the read-only version of the
     * TranslationBlock, so that we minimize the pc-relative
     * distance of the address of the exit_tb code to TB.
     * This will improve utilization of pc-relative address loads.
     *
     * TODO: Move this to translator_loop, so that all const
     * TranslationBlock pointers refer to read-only memory.
     * This requires coordination with targets that do not use
     * the translator_loop.
     */
    uintptr_t val = (uintptr_t)tcg_splitwx_to_rx((void *)tb) + idx;

    if (tb == NULL) {
        tcg_debug_assert(idx == 0);
    } else if (idx <= TB_EXIT_IDXMAX) {
#ifdef CONFIG_DEBUG_TCG
        /* This is an exit following a goto_tb.  Verify that we have
           seen this numbered exit before, via tcg_gen_goto_tb.  */
        tcg_debug_assert(tcg_ctx->goto_tb_issue_mask & (1 << idx));
#endif
    } else {
        /* This is an exit via the exitreq label.  */
        tcg_debug_assert(idx == TB_EXIT_REQUESTED);
    }

    plugin_gen_disable_mem_helpers();
    tcg_gen_op1i(INDEX_op_exit_tb, val);
}

void tcg_gen_goto_tb(unsigned idx)
{
    /* We tested CF_NO_GOTO_TB in translator_use_goto_tb. */
    tcg_debug_assert(!(tcg_ctx->gen_tb->cflags & CF_NO_GOTO_TB));
    /* We only support two chained exits.  */
    tcg_debug_assert(idx <= TB_EXIT_IDXMAX);
#ifdef CONFIG_DEBUG_TCG
    /* Verify that we haven't seen this numbered exit before.  */
    tcg_debug_assert((tcg_ctx->goto_tb_issue_mask & (1 << idx)) == 0);
    tcg_ctx->goto_tb_issue_mask |= 1 << idx;
#endif
    plugin_gen_disable_mem_helpers();
    tcg_gen_op1i(INDEX_op_goto_tb, idx);
}

void tcg_gen_lookup_and_goto_ptr(void)
{
    TCGv_ptr ptr;

    if (tcg_ctx->gen_tb->cflags & CF_NO_GOTO_PTR) {
        tcg_gen_exit_tb(NULL, 0);
        return;
    }

    plugin_gen_disable_mem_helpers();
    ptr = tcg_temp_new_ptr();
    gen_helper_lookup_tb_ptr(ptr, cpu_env);
    tcg_gen_op1i(INDEX_op_goto_ptr, tcgv_ptr_arg(ptr));
    tcg_temp_free_ptr(ptr);
}

static inline MemOp tcg_canonicalize_memop(MemOp op, bool is64, bool st)
{
    /* Trigger the asserts within as early as possible.  */
    unsigned a_bits = get_alignment_bits(op);

    /* Prefer MO_ALIGN+MO_XX over MO_ALIGN_XX+MO_XX */
    if (a_bits == (op & MO_SIZE)) {
        op = (op & ~MO_AMASK) | MO_ALIGN;
    }

    switch (op & MO_SIZE) {
    case MO_8:
        op &= ~MO_BSWAP;
        break;
    case MO_16:
        break;
    case MO_32:
        if (!is64) {
            op &= ~MO_SIGN;
        }
        break;
    case MO_64:
        if (is64) {
            op &= ~MO_SIGN;
            break;
        }
        /* fall through */
    default:
        g_assert_not_reached();
    }
    if (st) {
        op &= ~MO_SIGN;
    }
    return op;
}

static void gen_ldst_i32(TCGOpcode opc, TCGv_i32 val, TCGv addr,
                         MemOp memop, TCGArg idx)
{
    MemOpIdx oi = make_memop_idx(memop, idx);
#if TARGET_LONG_BITS == 32
    tcg_gen_op3i_i32(opc, val, addr, oi);
#else
    if (TCG_TARGET_REG_BITS == 32) {
        tcg_gen_op4i_i32(opc, val, TCGV_LOW(addr), TCGV_HIGH(addr), oi);
    } else {
        tcg_gen_op3(opc, tcgv_i32_arg(val), tcgv_i64_arg(addr), oi);
    }
#endif
}

static void gen_ldst_i64(TCGOpcode opc, TCGv_i64 val, TCGv addr,
                         MemOp memop, TCGArg idx)
{
    MemOpIdx oi = make_memop_idx(memop, idx);
#if TARGET_LONG_BITS == 32
    if (TCG_TARGET_REG_BITS == 32) {
        tcg_gen_op4i_i32(opc, TCGV_LOW(val), TCGV_HIGH(val), addr, oi);
    } else {
        tcg_gen_op3(opc, tcgv_i64_arg(val), tcgv_i32_arg(addr), oi);
    }
#else
    if (TCG_TARGET_REG_BITS == 32) {
        tcg_gen_op5i_i32(opc, TCGV_LOW(val), TCGV_HIGH(val),
                         TCGV_LOW(addr), TCGV_HIGH(addr), oi);
    } else {
        tcg_gen_op3i_i64(opc, val, addr, oi);
    }
#endif
}

static void tcg_gen_req_mo(TCGBar type)
{
#ifdef TCG_GUEST_DEFAULT_MO
    type &= TCG_GUEST_DEFAULT_MO;
#endif
    type &= ~TCG_TARGET_DEFAULT_MO;
    if (type) {
        tcg_gen_mb(type | TCG_BAR_SC);
    }
}

static inline TCGv plugin_prep_mem_callbacks(TCGv vaddr)
{
#ifdef CONFIG_PLUGIN
    if (tcg_ctx->plugin_insn != NULL) {
        /* Save a copy of the vaddr for use after a load.  */
        TCGv temp = tcg_temp_new();
        tcg_gen_mov_tl(temp, vaddr);
        return temp;
    }
#endif
    return vaddr;
}

static void plugin_gen_mem_callbacks(TCGv vaddr, MemOpIdx oi,
                                     enum qemu_plugin_mem_rw rw)
{
#ifdef CONFIG_PLUGIN
    if (tcg_ctx->plugin_insn != NULL) {
        qemu_plugin_meminfo_t info = make_plugin_meminfo(oi, rw);
        plugin_gen_empty_mem_callback(vaddr, info);
        tcg_temp_free(vaddr);
    }
#endif
}

void tcg_gen_qemu_ld_i32(TCGv_i32 val, TCGv addr, TCGArg idx, MemOp memop)
{
    MemOp orig_memop;
    MemOpIdx oi;

    tcg_gen_req_mo(TCG_MO_LD_LD | TCG_MO_ST_LD);
    memop = tcg_canonicalize_memop(memop, 0, 0);
    oi = make_memop_idx(memop, idx);

    orig_memop = memop;
    if (!TCG_TARGET_HAS_MEMORY_BSWAP && (memop & MO_BSWAP)) {
        memop &= ~MO_BSWAP;
        /* The bswap primitive benefits from zero-extended input.  */
        if ((memop & MO_SSIZE) == MO_SW) {
            memop &= ~MO_SIGN;
        }
    }

    addr = plugin_prep_mem_callbacks(addr);
    gen_ldst_i32(INDEX_op_qemu_ld_i32, val, addr, memop, idx);
    plugin_gen_mem_callbacks(addr, oi, QEMU_PLUGIN_MEM_R);

    if ((orig_memop ^ memop) & MO_BSWAP) {
        switch (orig_memop & MO_SIZE) {
        case MO_16:
            tcg_gen_bswap16_i32(val, val, (orig_memop & MO_SIGN
                                           ? TCG_BSWAP_IZ | TCG_BSWAP_OS
                                           : TCG_BSWAP_IZ | TCG_BSWAP_OZ));
            break;
        case MO_32:
            tcg_gen_bswap32_i32(val, val);
            break;
        default:
            g_assert_not_reached();
        }
    }
}

void tcg_gen_qemu_st_i32(TCGv_i32 val, TCGv addr, TCGArg idx, MemOp memop)
{
    TCGv_i32 swap = NULL;
    MemOpIdx oi;

    tcg_gen_req_mo(TCG_MO_LD_ST | TCG_MO_ST_ST);
    memop = tcg_canonicalize_memop(memop, 0, 1);
    oi = make_memop_idx(memop, idx);

    if (!TCG_TARGET_HAS_MEMORY_BSWAP && (memop & MO_BSWAP)) {
        swap = tcg_temp_new_i32();
        switch (memop & MO_SIZE) {
        case MO_16:
            tcg_gen_bswap16_i32(swap, val, 0);
            break;
        case MO_32:
            tcg_gen_bswap32_i32(swap, val);
            break;
        default:
            g_assert_not_reached();
        }
        val = swap;
        memop &= ~MO_BSWAP;
    }

    addr = plugin_prep_mem_callbacks(addr);
    if (TCG_TARGET_HAS_qemu_st8_i32 && (memop & MO_SIZE) == MO_8) {
        gen_ldst_i32(INDEX_op_qemu_st8_i32, val, addr, memop, idx);
    } else {
        gen_ldst_i32(INDEX_op_qemu_st_i32, val, addr, memop, idx);
    }
    plugin_gen_mem_callbacks(addr, oi, QEMU_PLUGIN_MEM_W);

    if (swap) {
        tcg_temp_free_i32(swap);
    }
}

void tcg_gen_qemu_ld_i64(TCGv_i64 val, TCGv addr, TCGArg idx, MemOp memop)
{
    MemOp orig_memop;
    MemOpIdx oi;

    if (TCG_TARGET_REG_BITS == 32 && (memop & MO_SIZE) < MO_64) {
        tcg_gen_qemu_ld_i32(TCGV_LOW(val), addr, idx, memop);
        if (memop & MO_SIGN) {
            tcg_gen_sari_i32(TCGV_HIGH(val), TCGV_LOW(val), 31);
        } else {
            tcg_gen_movi_i32(TCGV_HIGH(val), 0);
        }
        return;
    }

    tcg_gen_req_mo(TCG_MO_LD_LD | TCG_MO_ST_LD);
    memop = tcg_canonicalize_memop(memop, 1, 0);
    oi = make_memop_idx(memop, idx);

    orig_memop = memop;
    if (!TCG_TARGET_HAS_MEMORY_BSWAP && (memop & MO_BSWAP)) {
        memop &= ~MO_BSWAP;
        /* The bswap primitive benefits from zero-extended input.  */
        if ((memop & MO_SIGN) && (memop & MO_SIZE) < MO_64) {
            memop &= ~MO_SIGN;
        }
    }

    addr = plugin_prep_mem_callbacks(addr);
    gen_ldst_i64(INDEX_op_qemu_ld_i64, val, addr, memop, idx);
    plugin_gen_mem_callbacks(addr, oi, QEMU_PLUGIN_MEM_R);

    if ((orig_memop ^ memop) & MO_BSWAP) {
        int flags = (orig_memop & MO_SIGN
                     ? TCG_BSWAP_IZ | TCG_BSWAP_OS
                     : TCG_BSWAP_IZ | TCG_BSWAP_OZ);
        switch (orig_memop & MO_SIZE) {
        case MO_16:
            tcg_gen_bswap16_i64(val, val, flags);
            break;
        case MO_32:
            tcg_gen_bswap32_i64(val, val, flags);
            break;
        case MO_64:
            tcg_gen_bswap64_i64(val, val);
            break;
        default:
            g_assert_not_reached();
        }
    }
}

void tcg_gen_qemu_st_i64(TCGv_i64 val, TCGv addr, TCGArg idx, MemOp memop)
{
    TCGv_i64 swap = NULL;
    MemOpIdx oi;

    if (TCG_TARGET_REG_BITS == 32 && (memop & MO_SIZE) < MO_64) {
        tcg_gen_qemu_st_i32(TCGV_LOW(val), addr, idx, memop);
        return;
    }

    tcg_gen_req_mo(TCG_MO_LD_ST | TCG_MO_ST_ST);
    memop = tcg_canonicalize_memop(memop, 1, 1);
    oi = make_memop_idx(memop, idx);

    if (!TCG_TARGET_HAS_MEMORY_BSWAP && (memop & MO_BSWAP)) {
        swap = tcg_temp_new_i64();
        switch (memop & MO_SIZE) {
        case MO_16:
            tcg_gen_bswap16_i64(swap, val, 0);
            break;
        case MO_32:
            tcg_gen_bswap32_i64(swap, val, 0);
            break;
        case MO_64:
            tcg_gen_bswap64_i64(swap, val);
            break;
        default:
            g_assert_not_reached();
        }
        val = swap;
        memop &= ~MO_BSWAP;
    }

    addr = plugin_prep_mem_callbacks(addr);
    gen_ldst_i64(INDEX_op_qemu_st_i64, val, addr, memop, idx);
    plugin_gen_mem_callbacks(addr, oi, QEMU_PLUGIN_MEM_W);

    if (swap) {
        tcg_temp_free_i64(swap);
    }
}

static void canonicalize_memop_i128_as_i64(MemOp ret[2], MemOp orig)
{
    MemOp mop_1 = orig, mop_2;

    tcg_debug_assert((orig & MO_SIZE) == MO_128);
    tcg_debug_assert((orig & MO_SIGN) == 0);

    /* Use a memory ordering implemented by the host. */
    if (!TCG_TARGET_HAS_MEMORY_BSWAP && (orig & MO_BSWAP)) {
        mop_1 &= ~MO_BSWAP;
    }

    /* Reduce the size to 64-bit. */
    mop_1 = (mop_1 & ~MO_SIZE) | MO_64;

    /* Retain the alignment constraints of the original. */
    switch (orig & MO_AMASK) {
    case MO_UNALN:
    case MO_ALIGN_2:
    case MO_ALIGN_4:
        mop_2 = mop_1;
        break;
    case MO_ALIGN_8:
        /* Prefer MO_ALIGN+MO_64 to MO_ALIGN_8+MO_64. */
        mop_1 = (mop_1 & ~MO_AMASK) | MO_ALIGN;
        mop_2 = mop_1;
        break;
    case MO_ALIGN:
        /* Second has 8-byte alignment; first has 16-byte alignment. */
        mop_2 = mop_1;
        mop_1 = (mop_1 & ~MO_AMASK) | MO_ALIGN_16;
        break;
    case MO_ALIGN_16:
    case MO_ALIGN_32:
    case MO_ALIGN_64:
        /* Second has 8-byte alignment; first retains original. */
        mop_2 = (mop_1 & ~MO_AMASK) | MO_ALIGN;
        break;
    default:
        g_assert_not_reached();
    }
    ret[0] = mop_1;
    ret[1] = mop_2;
}

void tcg_gen_qemu_ld_i128(TCGv_i128 val, TCGv addr, TCGArg idx, MemOp memop)
{
    MemOp mop[2];
    TCGv addr_p8;
    TCGv_i64 x, y;

    canonicalize_memop_i128_as_i64(mop, memop);

    tcg_gen_req_mo(TCG_MO_LD_LD | TCG_MO_ST_LD);
    addr = plugin_prep_mem_callbacks(addr);

    /* TODO: respect atomicity of the operation. */
    /* TODO: allow the tcg backend to see the whole operation. */

    /*
     * Since there are no global TCGv_i128, there is no visible state
     * changed if the second load faults.  Load directly into the two
     * subwords.
     */
    if ((memop & MO_BSWAP) == MO_LE) {
        x = TCGV128_LOW(val);
        y = TCGV128_HIGH(val);
    } else {
        x = TCGV128_HIGH(val);
        y = TCGV128_LOW(val);
    }

    gen_ldst_i64(INDEX_op_qemu_ld_i64, x, addr, mop[0], idx);

    if ((mop[0] ^ memop) & MO_BSWAP) {
        tcg_gen_bswap64_i64(x, x);
    }

    addr_p8 = tcg_temp_new();
    tcg_gen_addi_tl(addr_p8, addr, 8);
    gen_ldst_i64(INDEX_op_qemu_ld_i64, y, addr_p8, mop[1], idx);
    tcg_temp_free(addr_p8);

    if ((mop[0] ^ memop) & MO_BSWAP) {
        tcg_gen_bswap64_i64(y, y);
    }

    plugin_gen_mem_callbacks(addr, make_memop_idx(memop, idx),
                             QEMU_PLUGIN_MEM_R);
}

void tcg_gen_qemu_st_i128(TCGv_i128 val, TCGv addr, TCGArg idx, MemOp memop)
{
    MemOp mop[2];
    TCGv addr_p8;
    TCGv_i64 x, y;

    canonicalize_memop_i128_as_i64(mop, memop);

    tcg_gen_req_mo(TCG_MO_ST_LD | TCG_MO_ST_ST);
    addr = plugin_prep_mem_callbacks(addr);

    /* TODO: respect atomicity of the operation. */
    /* TODO: allow the tcg backend to see the whole operation. */

    if ((memop & MO_BSWAP) == MO_LE) {
        x = TCGV128_LOW(val);
        y = TCGV128_HIGH(val);
    } else {
        x = TCGV128_HIGH(val);
        y = TCGV128_LOW(val);
    }

    addr_p8 = tcg_temp_new();
    if ((mop[0] ^ memop) & MO_BSWAP) {
        TCGv_i64 t = tcg_temp_new_i64();

        tcg_gen_bswap64_i64(t, x);
        gen_ldst_i64(INDEX_op_qemu_st_i64, t, addr, mop[0], idx);
        tcg_gen_bswap64_i64(t, y);
        tcg_gen_addi_tl(addr_p8, addr, 8);
        gen_ldst_i64(INDEX_op_qemu_st_i64, t, addr_p8, mop[1], idx);
        tcg_temp_free_i64(t);
    } else {
        gen_ldst_i64(INDEX_op_qemu_st_i64, x, addr, mop[0], idx);
        tcg_gen_addi_tl(addr_p8, addr, 8);
        gen_ldst_i64(INDEX_op_qemu_st_i64, y, addr_p8, mop[1], idx);
    }
    tcg_temp_free(addr_p8);

    plugin_gen_mem_callbacks(addr, make_memop_idx(memop, idx),
                             QEMU_PLUGIN_MEM_W);
}

static void tcg_gen_ext_i32(TCGv_i32 ret, TCGv_i32 val, MemOp opc)
{
    switch (opc & MO_SSIZE) {
    case MO_SB:
        tcg_gen_ext8s_i32(ret, val);
        break;
    case MO_UB:
        tcg_gen_ext8u_i32(ret, val);
        break;
    case MO_SW:
        tcg_gen_ext16s_i32(ret, val);
        break;
    case MO_UW:
        tcg_gen_ext16u_i32(ret, val);
        break;
    default:
        tcg_gen_mov_i32(ret, val);
        break;
    }
}

static void tcg_gen_ext_i64(TCGv_i64 ret, TCGv_i64 val, MemOp opc)
{
    switch (opc & MO_SSIZE) {
    case MO_SB:
        tcg_gen_ext8s_i64(ret, val);
        break;
    case MO_UB:
        tcg_gen_ext8u_i64(ret, val);
        break;
    case MO_SW:
        tcg_gen_ext16s_i64(ret, val);
        break;
    case MO_UW:
        tcg_gen_ext16u_i64(ret, val);
        break;
    case MO_SL:
        tcg_gen_ext32s_i64(ret, val);
        break;
    case MO_UL:
        tcg_gen_ext32u_i64(ret, val);
        break;
    default:
        tcg_gen_mov_i64(ret, val);
        break;
    }
}

typedef void (*gen_atomic_cx_i32)(TCGv_i32, TCGv_env, TCGv,
                                  TCGv_i32, TCGv_i32, TCGv_i32);
typedef void (*gen_atomic_cx_i64)(TCGv_i64, TCGv_env, TCGv,
                                  TCGv_i64, TCGv_i64, TCGv_i32);
typedef void (*gen_atomic_cx_i128)(TCGv_i128, TCGv_env, TCGv,
                                   TCGv_i128, TCGv_i128, TCGv_i32);
typedef void (*gen_atomic_op_i32)(TCGv_i32, TCGv_env, TCGv,
                                  TCGv_i32, TCGv_i32);
typedef void (*gen_atomic_op_i64)(TCGv_i64, TCGv_env, TCGv,
                                  TCGv_i64, TCGv_i32);

#ifdef CONFIG_ATOMIC64
# define WITH_ATOMIC64(X) X,
#else
# define WITH_ATOMIC64(X)
#endif
#ifdef CONFIG_CMPXCHG128
# define WITH_ATOMIC128(X) X,
#else
# define WITH_ATOMIC128(X)
#endif

static void * const table_cmpxchg[(MO_SIZE | MO_BSWAP) + 1] = {
    [MO_8] = gen_helper_atomic_cmpxchgb,
    [MO_16 | MO_LE] = gen_helper_atomic_cmpxchgw_le,
    [MO_16 | MO_BE] = gen_helper_atomic_cmpxchgw_be,
    [MO_32 | MO_LE] = gen_helper_atomic_cmpxchgl_le,
    [MO_32 | MO_BE] = gen_helper_atomic_cmpxchgl_be,
    WITH_ATOMIC64([MO_64 | MO_LE] = gen_helper_atomic_cmpxchgq_le)
    WITH_ATOMIC64([MO_64 | MO_BE] = gen_helper_atomic_cmpxchgq_be)
    WITH_ATOMIC128([MO_128 | MO_LE] = gen_helper_atomic_cmpxchgo_le)
    WITH_ATOMIC128([MO_128 | MO_BE] = gen_helper_atomic_cmpxchgo_be)
};

void tcg_gen_nonatomic_cmpxchg_i32(TCGv_i32 retv, TCGv addr, TCGv_i32 cmpv,
                                   TCGv_i32 newv, TCGArg idx, MemOp memop)
{
    TCGv_i32 t1 = tcg_temp_new_i32();
    TCGv_i32 t2 = tcg_temp_new_i32();

    tcg_gen_ext_i32(t2, cmpv, memop & MO_SIZE);

    tcg_gen_qemu_ld_i32(t1, addr, idx, memop & ~MO_SIGN);
    tcg_gen_movcond_i32(TCG_COND_EQ, t2, t1, t2, newv, t1);
    tcg_gen_qemu_st_i32(t2, addr, idx, memop);
    tcg_temp_free_i32(t2);

    if (memop & MO_SIGN) {
        tcg_gen_ext_i32(retv, t1, memop);
    } else {
        tcg_gen_mov_i32(retv, t1);
    }
    tcg_temp_free_i32(t1);
}

void tcg_gen_atomic_cmpxchg_i32(TCGv_i32 retv, TCGv addr, TCGv_i32 cmpv,
                                TCGv_i32 newv, TCGArg idx, MemOp memop)
{
    gen_atomic_cx_i32 gen;
    MemOpIdx oi;

    if (!(tcg_ctx->gen_tb->cflags & CF_PARALLEL)) {
        tcg_gen_nonatomic_cmpxchg_i32(retv, addr, cmpv, newv, idx, memop);
        return;
    }

    memop = tcg_canonicalize_memop(memop, 0, 0);
    gen = table_cmpxchg[memop & (MO_SIZE | MO_BSWAP)];
    tcg_debug_assert(gen != NULL);

    oi = make_memop_idx(memop & ~MO_SIGN, idx);
    gen(retv, cpu_env, addr, cmpv, newv, tcg_constant_i32(oi));

    if (memop & MO_SIGN) {
        tcg_gen_ext_i32(retv, retv, memop);
    }
}

void tcg_gen_nonatomic_cmpxchg_i64(TCGv_i64 retv, TCGv addr, TCGv_i64 cmpv,
                                   TCGv_i64 newv, TCGArg idx, MemOp memop)
{
    TCGv_i64 t1, t2;

    if (TCG_TARGET_REG_BITS == 32 && (memop & MO_SIZE) < MO_64) {
        tcg_gen_nonatomic_cmpxchg_i32(TCGV_LOW(retv), addr, TCGV_LOW(cmpv),
                                      TCGV_LOW(newv), idx, memop);
        if (memop & MO_SIGN) {
            tcg_gen_sari_i32(TCGV_HIGH(retv), TCGV_LOW(retv), 31);
        } else {
            tcg_gen_movi_i32(TCGV_HIGH(retv), 0);
        }
        return;
    }

    t1 = tcg_temp_new_i64();
    t2 = tcg_temp_new_i64();

    tcg_gen_ext_i64(t2, cmpv, memop & MO_SIZE);

    tcg_gen_qemu_ld_i64(t1, addr, idx, memop & ~MO_SIGN);
    tcg_gen_movcond_i64(TCG_COND_EQ, t2, t1, t2, newv, t1);
    tcg_gen_qemu_st_i64(t2, addr, idx, memop);
    tcg_temp_free_i64(t2);

    if (memop & MO_SIGN) {
        tcg_gen_ext_i64(retv, t1, memop);
    } else {
        tcg_gen_mov_i64(retv, t1);
    }
    tcg_temp_free_i64(t1);
}

void tcg_gen_atomic_cmpxchg_i64(TCGv_i64 retv, TCGv addr, TCGv_i64 cmpv,
                                TCGv_i64 newv, TCGArg idx, MemOp memop)
{
    if (!(tcg_ctx->gen_tb->cflags & CF_PARALLEL)) {
        tcg_gen_nonatomic_cmpxchg_i64(retv, addr, cmpv, newv, idx, memop);
        return;
    }

    if ((memop & MO_SIZE) == MO_64) {
        gen_atomic_cx_i64 gen;

        memop = tcg_canonicalize_memop(memop, 1, 0);
        gen = table_cmpxchg[memop & (MO_SIZE | MO_BSWAP)];
        if (gen) {
            MemOpIdx oi = make_memop_idx(memop, idx);
            gen(retv, cpu_env, addr, cmpv, newv, tcg_constant_i32(oi));
            return;
        }

        gen_helper_exit_atomic(cpu_env);

        /*
         * Produce a result for a well-formed opcode stream.  This satisfies
         * liveness for set before used, which happens before this dead code
         * is removed.
         */
        tcg_gen_movi_i64(retv, 0);
        return;
    }

    if (TCG_TARGET_REG_BITS == 32) {
        tcg_gen_atomic_cmpxchg_i32(TCGV_LOW(retv), addr, TCGV_LOW(cmpv),
                                   TCGV_LOW(newv), idx, memop);
        if (memop & MO_SIGN) {
            tcg_gen_sari_i32(TCGV_HIGH(retv), TCGV_LOW(retv), 31);
        } else {
            tcg_gen_movi_i32(TCGV_HIGH(retv), 0);
        }
    } else {
        TCGv_i32 c32 = tcg_temp_new_i32();
        TCGv_i32 n32 = tcg_temp_new_i32();
        TCGv_i32 r32 = tcg_temp_new_i32();

        tcg_gen_extrl_i64_i32(c32, cmpv);
        tcg_gen_extrl_i64_i32(n32, newv);
        tcg_gen_atomic_cmpxchg_i32(r32, addr, c32, n32, idx, memop & ~MO_SIGN);
        tcg_temp_free_i32(c32);
        tcg_temp_free_i32(n32);

        tcg_gen_extu_i32_i64(retv, r32);
        tcg_temp_free_i32(r32);

        if (memop & MO_SIGN) {
            tcg_gen_ext_i64(retv, retv, memop);
        }
    }
}

void tcg_gen_nonatomic_cmpxchg_i128(TCGv_i128 retv, TCGv addr, TCGv_i128 cmpv,
                                    TCGv_i128 newv, TCGArg idx, MemOp memop)
{
    if (TCG_TARGET_REG_BITS == 32) {
        /* Inline expansion below is simply too large for 32-bit hosts. */
        gen_atomic_cx_i128 gen = ((memop & MO_BSWAP) == MO_LE
                                  ? gen_helper_nonatomic_cmpxchgo_le 
                                  : gen_helper_nonatomic_cmpxchgo_be);
        MemOpIdx oi = make_memop_idx(memop, idx);

        tcg_debug_assert((memop & MO_SIZE) == MO_128);
        tcg_debug_assert((memop & MO_SIGN) == 0);

        gen(retv, cpu_env, addr, cmpv, newv, tcg_constant_i32(oi));
    } else {
        TCGv_i128 oldv = tcg_temp_new_i128();
        TCGv_i128 tmpv = tcg_temp_new_i128();
        TCGv_i64 t0 = tcg_temp_new_i64();
        TCGv_i64 t1 = tcg_temp_new_i64();
        TCGv_i64 z = tcg_constant_i64(0);

        tcg_gen_qemu_ld_i128(oldv, addr, idx, memop);

        /* Compare i128 */
        tcg_gen_xor_i64(t0, TCGV128_LOW(oldv), TCGV128_LOW(cmpv));
        tcg_gen_xor_i64(t1, TCGV128_HIGH(oldv), TCGV128_HIGH(cmpv));
        tcg_gen_or_i64(t0, t0, t1);

        /* tmpv = equal ? newv : oldv */
        tcg_gen_movcond_i64(TCG_COND_EQ, TCGV128_LOW(tmpv), t0, z,
                            TCGV128_LOW(newv), TCGV128_LOW(oldv));
        tcg_gen_movcond_i64(TCG_COND_EQ, TCGV128_HIGH(tmpv), t0, z,
                            TCGV128_HIGH(newv), TCGV128_HIGH(oldv));

        /* Unconditional writeback. */
        tcg_gen_qemu_st_i128(tmpv, addr, idx, memop);
        tcg_gen_mov_i128(retv, oldv);

        tcg_temp_free_i64(t0);
        tcg_temp_free_i64(t1);
        tcg_temp_free_i128(tmpv);
        tcg_temp_free_i128(oldv);
    }
}

void tcg_gen_atomic_cmpxchg_i128(TCGv_i128 retv, TCGv addr, TCGv_i128 cmpv,
                                 TCGv_i128 newv, TCGArg idx, MemOp memop)
{
    gen_atomic_cx_i128 gen;

    if (!(tcg_ctx->gen_tb->cflags & CF_PARALLEL)) {
        tcg_gen_nonatomic_cmpxchg_i128(retv, addr, cmpv, newv, idx, memop);
        return;
    }

    tcg_debug_assert((memop & MO_SIZE) == MO_128);
    tcg_debug_assert((memop & MO_SIGN) == 0);
    gen = table_cmpxchg[memop & (MO_SIZE | MO_BSWAP)];

    if (gen) {
        MemOpIdx oi = make_memop_idx(memop, idx);
        gen(retv, cpu_env, addr, cmpv, newv, tcg_constant_i32(oi));
        return;
    }

    gen_helper_exit_atomic(cpu_env);

    /*
     * Produce a result for a well-formed opcode stream.  This satisfies
     * liveness for set before used, which happens before this dead code
     * is removed.
     */
    tcg_gen_movi_i64(TCGV128_LOW(retv), 0);
    tcg_gen_movi_i64(TCGV128_HIGH(retv), 0);
}

static void do_nonatomic_op_i32(TCGv_i32 ret, TCGv addr, TCGv_i32 val,
                                TCGArg idx, MemOp memop, bool new_val,
                                void (*gen)(TCGv_i32, TCGv_i32, TCGv_i32))
{
    TCGv_i32 t1 = tcg_temp_new_i32();
    TCGv_i32 t2 = tcg_temp_new_i32();

    memop = tcg_canonicalize_memop(memop, 0, 0);

    tcg_gen_qemu_ld_i32(t1, addr, idx, memop);
    tcg_gen_ext_i32(t2, val, memop);
    gen(t2, t1, t2);
    tcg_gen_qemu_st_i32(t2, addr, idx, memop);

    tcg_gen_ext_i32(ret, (new_val ? t2 : t1), memop);
    tcg_temp_free_i32(t1);
    tcg_temp_free_i32(t2);
}

static void do_atomic_op_i32(TCGv_i32 ret, TCGv addr, TCGv_i32 val,
                             TCGArg idx, MemOp memop, void * const table[])
{
    gen_atomic_op_i32 gen;
    MemOpIdx oi;

    memop = tcg_canonicalize_memop(memop, 0, 0);

    gen = table[memop & (MO_SIZE | MO_BSWAP)];
    tcg_debug_assert(gen != NULL);

    oi = make_memop_idx(memop & ~MO_SIGN, idx);
    gen(ret, cpu_env, addr, val, tcg_constant_i32(oi));

    if (memop & MO_SIGN) {
        tcg_gen_ext_i32(ret, ret, memop);
    }
}

static void do_nonatomic_op_i64(TCGv_i64 ret, TCGv addr, TCGv_i64 val,
                                TCGArg idx, MemOp memop, bool new_val,
                                void (*gen)(TCGv_i64, TCGv_i64, TCGv_i64))
{
    TCGv_i64 t1 = tcg_temp_new_i64();
    TCGv_i64 t2 = tcg_temp_new_i64();

    memop = tcg_canonicalize_memop(memop, 1, 0);

    tcg_gen_qemu_ld_i64(t1, addr, idx, memop);
    tcg_gen_ext_i64(t2, val, memop);
    gen(t2, t1, t2);
    tcg_gen_qemu_st_i64(t2, addr, idx, memop);

    tcg_gen_ext_i64(ret, (new_val ? t2 : t1), memop);
    tcg_temp_free_i64(t1);
    tcg_temp_free_i64(t2);
}

static void do_atomic_op_i64(TCGv_i64 ret, TCGv addr, TCGv_i64 val,
                             TCGArg idx, MemOp memop, void * const table[])
{
    memop = tcg_canonicalize_memop(memop, 1, 0);

    if ((memop & MO_SIZE) == MO_64) {
#ifdef CONFIG_ATOMIC64
        gen_atomic_op_i64 gen;
        MemOpIdx oi;

        gen = table[memop & (MO_SIZE | MO_BSWAP)];
        tcg_debug_assert(gen != NULL);

        oi = make_memop_idx(memop & ~MO_SIGN, idx);
        gen(ret, cpu_env, addr, val, tcg_constant_i32(oi));
#else
        gen_helper_exit_atomic(cpu_env);
        /* Produce a result, so that we have a well-formed opcode stream
           with respect to uses of the result in the (dead) code following.  */
        tcg_gen_movi_i64(ret, 0);
#endif /* CONFIG_ATOMIC64 */
    } else {
        TCGv_i32 v32 = tcg_temp_new_i32();
        TCGv_i32 r32 = tcg_temp_new_i32();

        tcg_gen_extrl_i64_i32(v32, val);
        do_atomic_op_i32(r32, addr, v32, idx, memop & ~MO_SIGN, table);
        tcg_temp_free_i32(v32);

        tcg_gen_extu_i32_i64(ret, r32);
        tcg_temp_free_i32(r32);

        if (memop & MO_SIGN) {
            tcg_gen_ext_i64(ret, ret, memop);
        }
    }
}

#define GEN_ATOMIC_HELPER(NAME, OP, NEW)                                \
static void * const table_##NAME[(MO_SIZE | MO_BSWAP) + 1] = {          \
    [MO_8] = gen_helper_atomic_##NAME##b,                               \
    [MO_16 | MO_LE] = gen_helper_atomic_##NAME##w_le,                   \
    [MO_16 | MO_BE] = gen_helper_atomic_##NAME##w_be,                   \
    [MO_32 | MO_LE] = gen_helper_atomic_##NAME##l_le,                   \
    [MO_32 | MO_BE] = gen_helper_atomic_##NAME##l_be,                   \
    WITH_ATOMIC64([MO_64 | MO_LE] = gen_helper_atomic_##NAME##q_le)     \
    WITH_ATOMIC64([MO_64 | MO_BE] = gen_helper_atomic_##NAME##q_be)     \
};                                                                      \
void tcg_gen_atomic_##NAME##_i32                                        \
    (TCGv_i32 ret, TCGv addr, TCGv_i32 val, TCGArg idx, MemOp memop)    \
{                                                                       \
    if (tcg_ctx->gen_tb->cflags & CF_PARALLEL) {                        \
        do_atomic_op_i32(ret, addr, val, idx, memop, table_##NAME);     \
    } else {                                                            \
        do_nonatomic_op_i32(ret, addr, val, idx, memop, NEW,            \
                            tcg_gen_##OP##_i32);                        \
    }                                                                   \
}                                                                       \
void tcg_gen_atomic_##NAME##_i64                                        \
    (TCGv_i64 ret, TCGv addr, TCGv_i64 val, TCGArg idx, MemOp memop)    \
{                                                                       \
    if (tcg_ctx->gen_tb->cflags & CF_PARALLEL) {                        \
        do_atomic_op_i64(ret, addr, val, idx, memop, table_##NAME);     \
    } else {                                                            \
        do_nonatomic_op_i64(ret, addr, val, idx, memop, NEW,            \
                            tcg_gen_##OP##_i64);                        \
    }                                                                   \
}

GEN_ATOMIC_HELPER(fetch_add, add, 0)
GEN_ATOMIC_HELPER(fetch_and, and, 0)
GEN_ATOMIC_HELPER(fetch_or, or, 0)
GEN_ATOMIC_HELPER(fetch_xor, xor, 0)
GEN_ATOMIC_HELPER(fetch_smin, smin, 0)
GEN_ATOMIC_HELPER(fetch_umin, umin, 0)
GEN_ATOMIC_HELPER(fetch_smax, smax, 0)
GEN_ATOMIC_HELPER(fetch_umax, umax, 0)

GEN_ATOMIC_HELPER(add_fetch, add, 1)
GEN_ATOMIC_HELPER(and_fetch, and, 1)
GEN_ATOMIC_HELPER(or_fetch, or, 1)
GEN_ATOMIC_HELPER(xor_fetch, xor, 1)
GEN_ATOMIC_HELPER(smin_fetch, smin, 1)
GEN_ATOMIC_HELPER(umin_fetch, umin, 1)
GEN_ATOMIC_HELPER(smax_fetch, smax, 1)
GEN_ATOMIC_HELPER(umax_fetch, umax, 1)

static void tcg_gen_mov2_i32(TCGv_i32 r, TCGv_i32 a, TCGv_i32 b)
{
    tcg_gen_mov_i32(r, b);
}

static void tcg_gen_mov2_i64(TCGv_i64 r, TCGv_i64 a, TCGv_i64 b)
{
    tcg_gen_mov_i64(r, b);
}

GEN_ATOMIC_HELPER(xchg, mov2, 0)

#undef GEN_ATOMIC_HELPER