[qemu.git] / target-microblaze / op_helper.c

/*
 *  Microblaze helper routines.
 *
 *  Copyright (c) 2009 Edgar E. Iglesias <edgar.iglesias@gmail.com>.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
 */

#include <assert.h>
#include "exec.h"
#include "helper.h"
#include "host-utils.h"

#define D(x)

#if !defined(CONFIG_USER_ONLY)
#define MMUSUFFIX _mmu
#define SHIFT 0
#include "softmmu_template.h"
#define SHIFT 1
#include "softmmu_template.h"
#define SHIFT 2
#include "softmmu_template.h"
#define SHIFT 3
#include "softmmu_template.h"

/* Try to fill the TLB and return an exception if error. If retaddr is
   NULL, it means that the function was called in C code (i.e. not
   from generated code or from helper.c) */
/* XXX: fix it to restore all registers */
void tlb_fill (target_ulong addr, int is_write, int mmu_idx, void *retaddr)
{
    TranslationBlock *tb;
    CPUState *saved_env;
    unsigned long pc;
    int ret;

    /* XXX: hack to restore env in all cases, even if not called from
       generated code */
    saved_env = env;
    env = cpu_single_env;

    ret = cpu_mb_handle_mmu_fault(env, addr, is_write, mmu_idx, 1);
    if (unlikely(ret)) {
        if (retaddr) {
            /* now we have a real cpu fault */
            pc = (unsigned long)retaddr;
            tb = tb_find_pc(pc);
            if (tb) {
                /* the PC is inside the translated code. It means that we have
                   a virtual CPU fault */
                cpu_restore_state(tb, env, pc, NULL);
            }
        }
        cpu_loop_exit();
    }
    env = saved_env;
}
#endif

void helper_raise_exception(uint32_t index)
{
    env->exception_index = index;
    cpu_loop_exit();
}

void helper_debug(void)
{
    int i;

    qemu_log("PC=%8.8x\n", env->sregs[SR_PC]);
    qemu_log("rmsr=%x resr=%x rear=%x debug[%x] imm=%x iflags=%x\n",
             env->sregs[SR_MSR], env->sregs[SR_ESR], env->sregs[SR_EAR],
             env->debug, env->imm, env->iflags);
    qemu_log("btaken=%d btarget=%x mode=%s(saved=%s) eip=%d ie=%d\n",
             env->btaken, env->btarget,
             (env->sregs[SR_MSR] & MSR_UM) ? "user" : "kernel",
             (env->sregs[SR_MSR] & MSR_UMS) ? "user" : "kernel",
             (env->sregs[SR_MSR] & MSR_EIP),
             (env->sregs[SR_MSR] & MSR_IE));
    for (i = 0; i < 32; i++) {
        qemu_log("r%2.2d=%8.8x ", i, env->regs[i]);
        if ((i + 1) % 4 == 0)
            qemu_log("\n");
    }
    qemu_log("\n\n");
}

static inline uint32_t compute_carry(uint32_t a, uint32_t b, uint32_t cin)
{
    uint32_t cout = 0;

    if ((b == ~0) && cin)
        cout = 1;
    else if ((~0 - a) < (b + cin))
        cout = 1;
    return cout;
}

uint32_t helper_cmp(uint32_t a, uint32_t b)
{
    uint32_t t;

    t = b + ~a + 1;
    if ((b & 0x80000000) ^ (a & 0x80000000))
        t = (t & 0x7fffffff) | (b & 0x80000000);
    return t;
}

uint32_t helper_cmpu(uint32_t a, uint32_t b)
{
    uint32_t t;

    t = b + ~a + 1;
    if ((b & 0x80000000) ^ (a & 0x80000000))
        t = (t & 0x7fffffff) | (a & 0x80000000);
    return t;
}

uint32_t helper_addkc(uint32_t a, uint32_t b, uint32_t k, uint32_t c)
{
    uint32_t d, cf = 0, ncf;

    if (c)
        cf = env->sregs[SR_MSR] >> 31;
    assert(cf == 0 || cf == 1);
    d = a + b + cf;

    if (!k) {
        ncf = compute_carry(a, b, cf);
        assert(ncf == 0 || ncf == 1);
        if (ncf)
            env->sregs[SR_MSR] |= MSR_C | MSR_CC;
        else
            env->sregs[SR_MSR] &= ~(MSR_C | MSR_CC);
    }
    D(qemu_log("%x = %x + %x cf=%d ncf=%d k=%d c=%d\n",
               d, a, b, cf, ncf, k, c));
    return d;
}

uint32_t helper_subkc(uint32_t a, uint32_t b, uint32_t k, uint32_t c)
{
    uint32_t d, cf = 1, ncf;

    if (c)
        cf = env->sregs[SR_MSR] >> 31; 
    assert(cf == 0 || cf == 1);
    d = b + ~a + cf;

    if (!k) {
        ncf = compute_carry(b, ~a, cf);
        assert(ncf == 0 || ncf == 1);
        if (ncf)
            env->sregs[SR_MSR] |= MSR_C | MSR_CC;
        else
            env->sregs[SR_MSR] &= ~(MSR_C | MSR_CC);
    }
    D(qemu_log("%x = %x + %x cf=%d ncf=%d k=%d c=%d\n",
               d, a, b, cf, ncf, k, c));
    return d;
}

static inline int div_prepare(uint32_t a, uint32_t b)
{
    if (b == 0) {
        env->sregs[SR_MSR] |= MSR_DZ;

        if ((env->sregs[SR_MSR] & MSR_EE)
            && !(env->pvr.regs[2] & PVR2_DIV_ZERO_EXC_MASK)) {
            env->sregs[SR_ESR] = ESR_EC_DIVZERO;
            helper_raise_exception(EXCP_HW_EXCP);
        }
        return 0;
    }
    env->sregs[SR_MSR] &= ~MSR_DZ;
    return 1;
}

uint32_t helper_divs(uint32_t a, uint32_t b)
{
    if (!div_prepare(a, b))
        return 0;
    return (int32_t)a / (int32_t)b;
}

uint32_t helper_divu(uint32_t a, uint32_t b)
{
    if (!div_prepare(a, b))
        return 0;
    return a / b;
}

/* raise FPU exception.  */
static void raise_fpu_exception(void)
{
    env->sregs[SR_ESR] = ESR_EC_FPU;
    helper_raise_exception(EXCP_HW_EXCP);
}

static void update_fpu_flags(int flags)
{
    int raise = 0;

    if (flags & float_flag_invalid) {
        env->sregs[SR_FSR] |= FSR_IO;
        raise = 1;
    }
    if (flags & float_flag_divbyzero) {
        env->sregs[SR_FSR] |= FSR_DZ;
        raise = 1;
    }
    if (flags & float_flag_overflow) {
        env->sregs[SR_FSR] |= FSR_OF;
        raise = 1;
    }
    if (flags & float_flag_underflow) {
        env->sregs[SR_FSR] |= FSR_UF;
        raise = 1;
    }
    if (raise
        && (env->pvr.regs[2] & PVR2_FPU_EXC_MASK)
        && (env->sregs[SR_MSR] & MSR_EE)) {
        raise_fpu_exception();
    }
}

uint32_t helper_fadd(uint32_t a, uint32_t b)
{
    CPU_FloatU fd, fa, fb;
    int flags;

    set_float_exception_flags(0, &env->fp_status);
    fa.l = a;
    fb.l = b;
    fd.f = float32_add(fa.f, fb.f, &env->fp_status);

    flags = get_float_exception_flags(&env->fp_status);
    update_fpu_flags(flags);
    return fd.l;
}

uint32_t helper_frsub(uint32_t a, uint32_t b)
{
    CPU_FloatU fd, fa, fb;
    int flags;

    set_float_exception_flags(0, &env->fp_status);
    fa.l = a;
    fb.l = b;
    fd.f = float32_sub(fb.f, fa.f, &env->fp_status);
    flags = get_float_exception_flags(&env->fp_status);
    update_fpu_flags(flags);
    return fd.l;
}

uint32_t helper_fmul(uint32_t a, uint32_t b)
{
    CPU_FloatU fd, fa, fb;
    int flags;

    set_float_exception_flags(0, &env->fp_status);
    fa.l = a;
    fb.l = b;
    fd.f = float32_mul(fa.f, fb.f, &env->fp_status);
    flags = get_float_exception_flags(&env->fp_status);
    update_fpu_flags(flags);

    return fd.l;
}

uint32_t helper_fdiv(uint32_t a, uint32_t b)
{
    CPU_FloatU fd, fa, fb;
    int flags;

    set_float_exception_flags(0, &env->fp_status);
    fa.l = a;
    fb.l = b;
    fd.f = float32_div(fb.f, fa.f, &env->fp_status);
    flags = get_float_exception_flags(&env->fp_status);
    update_fpu_flags(flags);

    return fd.l;
}

uint32_t helper_fcmp_un(uint32_t a, uint32_t b)
{
    cpu_abort(env, "Unsupported fcmp.un\n");
    return 0;
}

uint32_t helper_fcmp_lt(uint32_t a, uint32_t b)
{
    CPU_FloatU fa, fb;
    int r;
    int flags;

    set_float_exception_flags(0, &env->fp_status);
    fa.l = a;
    fb.l = b;
    r = float32_lt(fb.f, fa.f, &env->fp_status);
    flags = get_float_exception_flags(&env->fp_status);
    update_fpu_flags(flags & float_flag_invalid);

    return r;
}

uint32_t helper_fcmp_eq(uint32_t a, uint32_t b)
{
    CPU_FloatU fa, fb;
    int flags;
    int r;

    set_float_exception_flags(0, &env->fp_status);
    fa.l = a;
    fb.l = b;
    r = float32_eq(fa.f, fb.f, &env->fp_status);
    flags = get_float_exception_flags(&env->fp_status);
    update_fpu_flags(flags & float_flag_invalid);

    return r;
}

uint32_t helper_fcmp_le(uint32_t a, uint32_t b)
{
    CPU_FloatU fa, fb;
    int flags;
    int r;

    fa.l = a;
    fb.l = b;
    set_float_exception_flags(0, &env->fp_status);
    r = float32_le(fa.f, fb.f, &env->fp_status);
    flags = get_float_exception_flags(&env->fp_status);
    update_fpu_flags(flags & float_flag_invalid);


    return r;
}

uint32_t helper_fcmp_gt(uint32_t a, uint32_t b)
{
    CPU_FloatU fa, fb;
    int flags, r;

    fa.l = a;
    fb.l = b;
    set_float_exception_flags(0, &env->fp_status);
    r = float32_lt(fa.f, fb.f, &env->fp_status);
    flags = get_float_exception_flags(&env->fp_status);
    update_fpu_flags(flags & float_flag_invalid);
    return r;
}

uint32_t helper_fcmp_ne(uint32_t a, uint32_t b)
{
    CPU_FloatU fa, fb;
    int flags, r;

    fa.l = a;
    fb.l = b;
    set_float_exception_flags(0, &env->fp_status);
    r = !float32_eq(fa.f, fb.f, &env->fp_status);
    flags = get_float_exception_flags(&env->fp_status);
    update_fpu_flags(flags & float_flag_invalid);

    return r;
}

uint32_t helper_fcmp_ge(uint32_t a, uint32_t b)
{
    CPU_FloatU fa, fb;
    int flags, r;

    fa.l = a;
    fb.l = b;
    set_float_exception_flags(0, &env->fp_status);
    r = !float32_lt(fa.f, fb.f, &env->fp_status);
    flags = get_float_exception_flags(&env->fp_status);
    update_fpu_flags(flags & float_flag_invalid);

    return r;
}

uint32_t helper_flt(uint32_t a)
{
    CPU_FloatU fd, fa;

    fa.l = a;
    fd.f = int32_to_float32(fa.l, &env->fp_status);
    return fd.l;
}

uint32_t helper_fint(uint32_t a)
{
    CPU_FloatU fa;
    uint32_t r;
    int flags;

    set_float_exception_flags(0, &env->fp_status);
    fa.l = a;
    r = float32_to_int32(fa.f, &env->fp_status);
    flags = get_float_exception_flags(&env->fp_status);
    update_fpu_flags(flags);

    return r;
}

uint32_t helper_fsqrt(uint32_t a)
{
    CPU_FloatU fd, fa;
    int flags;

    set_float_exception_flags(0, &env->fp_status);
    fa.l = a;
    fd.l = float32_sqrt(fa.f, &env->fp_status);
    flags = get_float_exception_flags(&env->fp_status);
    update_fpu_flags(flags);

    return fd.l;
}

uint32_t helper_pcmpbf(uint32_t a, uint32_t b)
{
    unsigned int i;
    uint32_t mask = 0xff000000;

    for (i = 0; i < 4; i++) {
        if ((a & mask) == (b & mask))
            return i + 1;
        mask >>= 8;
    }
    return 0;
}

void helper_memalign(uint32_t addr, uint32_t dr, uint32_t wr, uint32_t mask)
{
    if (addr & mask) {
            qemu_log_mask(CPU_LOG_INT,
                          "unaligned access addr=%x mask=%x, wr=%d dr=r%d\n",
                          addr, mask, wr, dr);
            env->sregs[SR_EAR] = addr;
            env->sregs[SR_ESR] = ESR_EC_UNALIGNED_DATA | (wr << 10) \
                                 | (dr & 31) << 5;
            if (mask == 3) {
                env->sregs[SR_ESR] |= 1 << 11;
            }
            if (!(env->sregs[SR_MSR] & MSR_EE)) {
                return;
            }
            helper_raise_exception(EXCP_HW_EXCP);
    }
}

#if !defined(CONFIG_USER_ONLY)
/* Writes/reads to the MMU's special regs end up here.  */
uint32_t helper_mmu_read(uint32_t rn)
{
    return mmu_read(env, rn);
}

void helper_mmu_write(uint32_t rn, uint32_t v)
{
    mmu_write(env, rn, v);
}

void do_unassigned_access(target_phys_addr_t addr, int is_write, int is_exec,
                          int is_asi, int size)
{
    CPUState *saved_env;

    if (!cpu_single_env) {
        /* XXX: ???   */
        return;
    }

    /* XXX: hack to restore env in all cases, even if not called from
       generated code */
    saved_env = env;
    env = cpu_single_env;
    qemu_log_mask(CPU_LOG_INT, "Unassigned " TARGET_FMT_plx " wr=%d exe=%d\n",
             addr, is_write, is_exec);
    if (!(env->sregs[SR_MSR] & MSR_EE)) {
        env = saved_env;
        return;
    }

    env->sregs[SR_EAR] = addr;
    if (is_exec) {
        if ((env->pvr.regs[2] & PVR2_IOPB_BUS_EXC_MASK)) {
            env->sregs[SR_ESR] = ESR_EC_INSN_BUS;
            helper_raise_exception(EXCP_HW_EXCP);
        }
    } else {
        if ((env->pvr.regs[2] & PVR2_DOPB_BUS_EXC_MASK)) {
            env->sregs[SR_ESR] = ESR_EC_DATA_BUS;
            helper_raise_exception(EXCP_HW_EXCP);
        }
    }
    env = saved_env;
}
#endif
Commit	Line	Data
4acb54ba EI	1	/*
	2	* Microblaze helper routines.
	3	*
	4	* Copyright (c) 2009 Edgar E. Iglesias <edgar.iglesias@gmail.com>.
	5	*
	6	* This library is free software; you can redistribute it and/or
	7	* modify it under the terms of the GNU Lesser General Public
	8	* License as published by the Free Software Foundation; either
	9	* version 2 of the License, or (at your option) any later version.
	10	*
	11	* This library is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	14	* Lesser General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU Lesser General Public
8167ee88	17	* License along with this library; if not, see <http://www.gnu.org/licenses/>.
4acb54ba EI	18	*/
	19
	20	#include <assert.h>
	21	#include "exec.h"
	22	#include "helper.h"
	23	#include "host-utils.h"
	24
	25	#define D(x)
	26
	27	#if !defined(CONFIG_USER_ONLY)
	28	#define MMUSUFFIX _mmu
	29	#define SHIFT 0
	30	#include "softmmu_template.h"
	31	#define SHIFT 1
	32	#include "softmmu_template.h"
	33	#define SHIFT 2
	34	#include "softmmu_template.h"
	35	#define SHIFT 3
	36	#include "softmmu_template.h"
	37
	38	/* Try to fill the TLB and return an exception if error. If retaddr is
	39	NULL, it means that the function was called in C code (i.e. not
	40	from generated code or from helper.c) */
	41	/* XXX: fix it to restore all registers */
	42	void tlb_fill (target_ulong addr, int is_write, int mmu_idx, void *retaddr)
	43	{
	44	TranslationBlock *tb;
	45	CPUState *saved_env;
	46	unsigned long pc;
	47	int ret;
	48
	49	/* XXX: hack to restore env in all cases, even if not called from
	50	generated code */
	51	saved_env = env;
	52	env = cpu_single_env;
	53
	54	ret = cpu_mb_handle_mmu_fault(env, addr, is_write, mmu_idx, 1);
	55	if (unlikely(ret)) {
	56	if (retaddr) {
	57	/* now we have a real cpu fault */
	58	pc = (unsigned long)retaddr;
	59	tb = tb_find_pc(pc);
	60	if (tb) {
	61	/* the PC is inside the translated code. It means that we have
	62	a virtual CPU fault */
	63	cpu_restore_state(tb, env, pc, NULL);
	64	}
	65	}
	66	cpu_loop_exit();
	67	}
	68	env = saved_env;
	69	}
	70	#endif
	71
	72	void helper_raise_exception(uint32_t index)
	73	{
	74	env->exception_index = index;
	75	cpu_loop_exit();
	76	}
	77
	78	void helper_debug(void)
	79	{
	80	int i;
	81
82	qemu_log("PC=%8.8x\n", env->sregs[SR_PC]);
4c24aa0a MS	83	qemu_log("rmsr=%x resr=%x rear=%x debug[%x] imm=%x iflags=%x\n",
4c24aa0a MS	84	env->sregs[SR_MSR], env->sregs[SR_ESR], env->sregs[SR_EAR],
17c52a43 EI	85	env->debug, env->imm, env->iflags);
	86	qemu_log("btaken=%d btarget=%x mode=%s(saved=%s) eip=%d ie=%d\n",
	87	env->btaken, env->btarget,
	88	(env->sregs[SR_MSR] & MSR_UM) ? "user" : "kernel",
	89	(env->sregs[SR_MSR] & MSR_UMS) ? "user" : "kernel",
	90	(env->sregs[SR_MSR] & MSR_EIP),
	91	(env->sregs[SR_MSR] & MSR_IE));
4acb54ba EI	92	for (i = 0; i < 32; i++) {
	93	qemu_log("r%2.2d=%8.8x ", i, env->regs[i]);
	94	if ((i + 1) % 4 == 0)
	95	qemu_log("\n");
	96	}
	97	qemu_log("\n\n");
	98	}
	99
	100	static inline uint32_t compute_carry(uint32_t a, uint32_t b, uint32_t cin)
	101	{
	102	uint32_t cout = 0;
	103
	104	if ((b == ~0) && cin)
	105	cout = 1;
	106	else if ((~0 - a) < (b + cin))
	107	cout = 1;
	108	return cout;
	109	}
	110
	111	uint32_t helper_cmp(uint32_t a, uint32_t b)
	112	{
	113	uint32_t t;
	114
	115	t = b + ~a + 1;
	116	if ((b & 0x80000000) ^ (a & 0x80000000))
	117	t = (t & 0x7fffffff) \| (b & 0x80000000);
	118	return t;
	119	}
	120
	121	uint32_t helper_cmpu(uint32_t a, uint32_t b)
	122	{
	123	uint32_t t;
	124
	125	t = b + ~a + 1;
	126	if ((b & 0x80000000) ^ (a & 0x80000000))
	127	t = (t & 0x7fffffff) \| (a & 0x80000000);
	128	return t;
	129	}
	130
	131	uint32_t helper_addkc(uint32_t a, uint32_t b, uint32_t k, uint32_t c)
	132	{
	133	uint32_t d, cf = 0, ncf;
	134
	135	if (c)
	136	cf = env->sregs[SR_MSR] >> 31;
	137	assert(cf == 0 \|\| cf == 1);
	138	d = a + b + cf;
	139
	140	if (!k) {
	141	ncf = compute_carry(a, b, cf);
	142	assert(ncf == 0 \|\| ncf == 1);
	143	if (ncf)
	144	env->sregs[SR_MSR] \|= MSR_C \| MSR_CC;
	145	else
	146	env->sregs[SR_MSR] &= ~(MSR_C \| MSR_CC);
	147	}
	148	D(qemu_log("%x = %x + %x cf=%d ncf=%d k=%d c=%d\n",
	149	d, a, b, cf, ncf, k, c));
	150	return d;
	151	}
	152
	153	uint32_t helper_subkc(uint32_t a, uint32_t b, uint32_t k, uint32_t c)
	154	{
	155	uint32_t d, cf = 1, ncf;
156
157	if (c)
158	cf = env->sregs[SR_MSR] >> 31;
159	assert(cf == 0 \|\| cf == 1);
160	d = b + ~a + cf;
161
162	if (!k) {
163	ncf = compute_carry(b, ~a, cf);
164	assert(ncf == 0 \|\| ncf == 1);
165	if (ncf)
166	env->sregs[SR_MSR] \|= MSR_C \| MSR_CC;
167	else
168	env->sregs[SR_MSR] &= ~(MSR_C \| MSR_CC);
169	}
170	D(qemu_log("%x = %x + %x cf=%d ncf=%d k=%d c=%d\n",
171	d, a, b, cf, ncf, k, c));
172	return d;
173	}
174
175	static inline int div_prepare(uint32_t a, uint32_t b)
176	{
177	if (b == 0) {
178	env->sregs[SR_MSR] \|= MSR_DZ;
821ebb33 EI	179
	180	if ((env->sregs[SR_MSR] & MSR_EE)
	181	&& !(env->pvr.regs[2] & PVR2_DIV_ZERO_EXC_MASK)) {
	182	env->sregs[SR_ESR] = ESR_EC_DIVZERO;
	183	helper_raise_exception(EXCP_HW_EXCP);
	184	}
4acb54ba EI	185	return 0;
	186	}
	187	env->sregs[SR_MSR] &= ~MSR_DZ;
	188	return 1;
	189	}
	190
	191	uint32_t helper_divs(uint32_t a, uint32_t b)
	192	{
	193	if (!div_prepare(a, b))
	194	return 0;
	195	return (int32_t)a / (int32_t)b;
	196	}
	197
	198	uint32_t helper_divu(uint32_t a, uint32_t b)
	199	{
	200	if (!div_prepare(a, b))
	201	return 0;
	202	return a / b;
	203	}
	204
97694c57 EI	205	/* raise FPU exception. */
	206	static void raise_fpu_exception(void)
	207	{
	208	env->sregs[SR_ESR] = ESR_EC_FPU;
	209	helper_raise_exception(EXCP_HW_EXCP);
	210	}
	211
	212	static void update_fpu_flags(int flags)
	213	{
	214	int raise = 0;
	215
	216	if (flags & float_flag_invalid) {
	217	env->sregs[SR_FSR] \|= FSR_IO;
	218	raise = 1;
	219	}
	220	if (flags & float_flag_divbyzero) {
	221	env->sregs[SR_FSR] \|= FSR_DZ;
	222	raise = 1;
	223	}
	224	if (flags & float_flag_overflow) {
	225	env->sregs[SR_FSR] \|= FSR_OF;
	226	raise = 1;
	227	}
	228	if (flags & float_flag_underflow) {
	229	env->sregs[SR_FSR] \|= FSR_UF;
	230	raise = 1;
	231	}
	232	if (raise
	233	&& (env->pvr.regs[2] & PVR2_FPU_EXC_MASK)
	234	&& (env->sregs[SR_MSR] & MSR_EE)) {
	235	raise_fpu_exception();
	236	}
	237	}
	238
	239	uint32_t helper_fadd(uint32_t a, uint32_t b)
	240	{
	241	CPU_FloatU fd, fa, fb;
	242	int flags;
	243
	244	set_float_exception_flags(0, &env->fp_status);
	245	fa.l = a;
	246	fb.l = b;
	247	fd.f = float32_add(fa.f, fb.f, &env->fp_status);
	248
	249	flags = get_float_exception_flags(&env->fp_status);
	250	update_fpu_flags(flags);
	251	return fd.l;
	252	}
	253
	254	uint32_t helper_frsub(uint32_t a, uint32_t b)
	255	{
	256	CPU_FloatU fd, fa, fb;
	257	int flags;
	258
	259	set_float_exception_flags(0, &env->fp_status);
	260	fa.l = a;
	261	fb.l = b;
	262	fd.f = float32_sub(fb.f, fa.f, &env->fp_status);
	263	flags = get_float_exception_flags(&env->fp_status);
	264	update_fpu_flags(flags);
	265	return fd.l;
	266	}
	267
	268	uint32_t helper_fmul(uint32_t a, uint32_t b)
269	{
270	CPU_FloatU fd, fa, fb;
271	int flags;
272
273	set_float_exception_flags(0, &env->fp_status);
274	fa.l = a;
275	fb.l = b;
276	fd.f = float32_mul(fa.f, fb.f, &env->fp_status);
277	flags = get_float_exception_flags(&env->fp_status);
278	update_fpu_flags(flags);
279
280	return fd.l;
281	}
282
283	uint32_t helper_fdiv(uint32_t a, uint32_t b)
284	{
285	CPU_FloatU fd, fa, fb;
286	int flags;
287
288	set_float_exception_flags(0, &env->fp_status);
289	fa.l = a;
290	fb.l = b;
291	fd.f = float32_div(fb.f, fa.f, &env->fp_status);
292	flags = get_float_exception_flags(&env->fp_status);
293	update_fpu_flags(flags);
294
295	return fd.l;
296	}
297
298	uint32_t helper_fcmp_un(uint32_t a, uint32_t b)
299	{
300	cpu_abort(env, "Unsupported fcmp.un\n");
301	return 0;
302	}
303
304	uint32_t helper_fcmp_lt(uint32_t a, uint32_t b)
305	{
306	CPU_FloatU fa, fb;
307	int r;
308	int flags;
309
310	set_float_exception_flags(0, &env->fp_status);
311	fa.l = a;
312	fb.l = b;
313	r = float32_lt(fb.f, fa.f, &env->fp_status);
314	flags = get_float_exception_flags(&env->fp_status);
315	update_fpu_flags(flags & float_flag_invalid);
316
317	return r;
318	}
319
320	uint32_t helper_fcmp_eq(uint32_t a, uint32_t b)
321	{
322	CPU_FloatU fa, fb;
323	int flags;
324	int r;
325
326	set_float_exception_flags(0, &env->fp_status);
327	fa.l = a;
328	fb.l = b;
329	r = float32_eq(fa.f, fb.f, &env->fp_status);
330	flags = get_float_exception_flags(&env->fp_status);
331	update_fpu_flags(flags & float_flag_invalid);
332
333	return r;
334	}
335
336	uint32_t helper_fcmp_le(uint32_t a, uint32_t b)
337	{
338	CPU_FloatU fa, fb;
339	int flags;
340	int r;
341
342	fa.l = a;
343	fb.l = b;
344	set_float_exception_flags(0, &env->fp_status);
345	r = float32_le(fa.f, fb.f, &env->fp_status);
346	flags = get_float_exception_flags(&env->fp_status);
347	update_fpu_flags(flags & float_flag_invalid);
348
349
350	return r;
351	}
352
353	uint32_t helper_fcmp_gt(uint32_t a, uint32_t b)
354	{
355	CPU_FloatU fa, fb;
356	int flags, r;
357
358	fa.l = a;
359	fb.l = b;
360	set_float_exception_flags(0, &env->fp_status);
361	r = float32_lt(fa.f, fb.f, &env->fp_status);
362	flags = get_float_exception_flags(&env->fp_status);
363	update_fpu_flags(flags & float_flag_invalid);
364	return r;
365	}
366
367	uint32_t helper_fcmp_ne(uint32_t a, uint32_t b)
368	{
369	CPU_FloatU fa, fb;
370	int flags, r;
371
372	fa.l = a;
373	fb.l = b;
374	set_float_exception_flags(0, &env->fp_status);
375	r = !float32_eq(fa.f, fb.f, &env->fp_status);
376	flags = get_float_exception_flags(&env->fp_status);
377	update_fpu_flags(flags & float_flag_invalid);
378
379	return r;
380	}
381
382	uint32_t helper_fcmp_ge(uint32_t a, uint32_t b)
383	{
384	CPU_FloatU fa, fb;
385	int flags, r;
386
387	fa.l = a;
388	fb.l = b;
389	set_float_exception_flags(0, &env->fp_status);
390	r = !float32_lt(fa.f, fb.f, &env->fp_status);
391	flags = get_float_exception_flags(&env->fp_status);
392	update_fpu_flags(flags & float_flag_invalid);
393
394	return r;
395	}
396
397	uint32_t helper_flt(uint32_t a)
398	{
399	CPU_FloatU fd, fa;
400
401	fa.l = a;
402	fd.f = int32_to_float32(fa.l, &env->fp_status);
403	return fd.l;
404	}
405
406	uint32_t helper_fint(uint32_t a)
407	{
408	CPU_FloatU fa;
409	uint32_t r;
410	int flags;
411
412	set_float_exception_flags(0, &env->fp_status);
413	fa.l = a;
414	r = float32_to_int32(fa.f, &env->fp_status);
415	flags = get_float_exception_flags(&env->fp_status);
416	update_fpu_flags(flags);
417
418	return r;
419	}
420
421	uint32_t helper_fsqrt(uint32_t a)
422	{
423	CPU_FloatU fd, fa;
424	int flags;
425
426	set_float_exception_flags(0, &env->fp_status);
427	fa.l = a;
428	fd.l = float32_sqrt(fa.f, &env->fp_status);
429	flags = get_float_exception_flags(&env->fp_status);
430	update_fpu_flags(flags);
431
432	return fd.l;
433	}
434
4acb54ba EI	435	uint32_t helper_pcmpbf(uint32_t a, uint32_t b)
	436	{
	437	unsigned int i;
	438	uint32_t mask = 0xff000000;
	439
	440	for (i = 0; i < 4; i++) {
	441	if ((a & mask) == (b & mask))
	442	return i + 1;
	443	mask >>= 8;
	444	}
	445	return 0;
	446	}
	447
3aa80988	448	void helper_memalign(uint32_t addr, uint32_t dr, uint32_t wr, uint32_t mask)
968a40f6	449	{
968a40f6	450	if (addr & mask) {
97f90cbf EI	451	qemu_log_mask(CPU_LOG_INT,
	452	"unaligned access addr=%x mask=%x, wr=%d dr=r%d\n",
	453	addr, mask, wr, dr);
	454	env->sregs[SR_EAR] = addr;
968a40f6 EI	455	env->sregs[SR_ESR] = ESR_EC_UNALIGNED_DATA \| (wr << 10) \
968a40f6 EI	456	\| (dr & 31) << 5;
3aa80988	457	if (mask == 3) {
968a40f6 EI	458	env->sregs[SR_ESR] \|= 1 << 11;
968a40f6 EI	459	}
97f90cbf EI	460	if (!(env->sregs[SR_MSR] & MSR_EE)) {
	461	return;
	462	}
968a40f6 EI	463	helper_raise_exception(EXCP_HW_EXCP);
	464	}
	465	}
	466
4acb54ba EI	467	#if !defined(CONFIG_USER_ONLY)
	468	/* Writes/reads to the MMU's special regs end up here. */
	469	uint32_t helper_mmu_read(uint32_t rn)
	470	{
	471	return mmu_read(env, rn);
	472	}
	473
	474	void helper_mmu_write(uint32_t rn, uint32_t v)
	475	{
	476	mmu_write(env, rn, v);
	477	}
faed1c2a	478
c227f099	479	void do_unassigned_access(target_phys_addr_t addr, int is_write, int is_exec,
faed1c2a EI	480	int is_asi, int size)
	481	{
	482	CPUState *saved_env;
e1aa3254 EI	483
	484	if (!cpu_single_env) {
	485	/* XXX: ??? */
	486	return;
	487	}
	488
faed1c2a EI	489	/* XXX: hack to restore env in all cases, even if not called from
	490	generated code */
	491	saved_env = env;
	492	env = cpu_single_env;
97f90cbf	493	qemu_log_mask(CPU_LOG_INT, "Unassigned " TARGET_FMT_plx " wr=%d exe=%d\n",
faed1c2a EI	494	addr, is_write, is_exec);
faed1c2a EI	495	if (!(env->sregs[SR_MSR] & MSR_EE)) {
95b279de	496	env = saved_env;
faed1c2a EI	497	return;
	498	}
	499
97f90cbf	500	env->sregs[SR_EAR] = addr;
faed1c2a	501	if (is_exec) {
97f90cbf	502	if ((env->pvr.regs[2] & PVR2_IOPB_BUS_EXC_MASK)) {
faed1c2a EI	503	env->sregs[SR_ESR] = ESR_EC_INSN_BUS;
	504	helper_raise_exception(EXCP_HW_EXCP);
	505	}
	506	} else {
97f90cbf	507	if ((env->pvr.regs[2] & PVR2_DOPB_BUS_EXC_MASK)) {
faed1c2a EI	508	env->sregs[SR_ESR] = ESR_EC_DATA_BUS;
	509	helper_raise_exception(EXCP_HW_EXCP);
	510	}
	511	}
95b279de	512	env = saved_env;
faed1c2a	513	}
3c7b48b7	514	#endif