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target/i386: Convert helper_{fbld,fbst}_ST0 to X86Access

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Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2024-04-07 23:58:17 -10:00
parent d3e8b648ab
commit 4526f58a27
1 changed files with 15 additions and 10 deletions
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25
target/i386/tcg/fpu_helper.c
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@ -773,18 +773,21 @@ void helper_fninit(CPUX86State *env)
void helper_fbld_ST0(CPUX86State *env, target_ulong ptr)
{
X86Access ac;
floatx80 tmp;
uint64_t val;
unsigned int v;
int i;
access_prepare(&ac, env, ptr, 10, MMU_DATA_LOAD, GETPC());
val = 0;
for (i = 8; i >= 0; i--) {
v = cpu_ldub_data_ra(env, ptr + i, GETPC());
v = access_ldb(&ac, ptr + i);
val = (val * 100) + ((v >> 4) * 10) + (v & 0xf);
}
tmp = int64_to_floatx80(val, &env->fp_status);
if (cpu_ldub_data_ra(env, ptr + 9, GETPC()) & 0x80) {
if (access_ldb(&ac, ptr + 9) & 0x80) {
tmp = floatx80_chs(tmp);
}
fpush(env);
@ -798,7 +801,9 @@ void helper_fbst_ST0(CPUX86State *env, target_ulong ptr)
target_ulong mem_ref, mem_end;
int64_t val;
CPU_LDoubleU temp;
X86Access ac;
access_prepare(&ac, env, ptr, 10, MMU_DATA_STORE, GETPC());
temp.d = ST0;
val = floatx80_to_int64(ST0, &env->fp_status);
@ -806,20 +811,20 @@ void helper_fbst_ST0(CPUX86State *env, target_ulong ptr)
if (val >= 1000000000000000000LL || val <= -1000000000000000000LL) {
set_float_exception_flags(float_flag_invalid, &env->fp_status);
while (mem_ref < ptr + 7) {
cpu_stb_data_ra(env, mem_ref++, 0, GETPC());
access_stb(&ac, mem_ref++, 0);
}
cpu_stb_data_ra(env, mem_ref++, 0xc0, GETPC());
cpu_stb_data_ra(env, mem_ref++, 0xff, GETPC());
cpu_stb_data_ra(env, mem_ref++, 0xff, GETPC());
access_stb(&ac, mem_ref++, 0xc0);
access_stb(&ac, mem_ref++, 0xff);
access_stb(&ac, mem_ref++, 0xff);
merge_exception_flags(env, old_flags);
return;
}
mem_end = mem_ref + 9;
if (SIGND(temp)) {
cpu_stb_data_ra(env, mem_end, 0x80, GETPC());
access_stb(&ac, mem_end, 0x80);
val = -val;
} else {
cpu_stb_data_ra(env, mem_end, 0x00, GETPC());
access_stb(&ac, mem_end, 0x00);
}
while (mem_ref < mem_end) {
if (val == 0) {
@ -828,10 +833,10 @@ void helper_fbst_ST0(CPUX86State *env, target_ulong ptr)
v = val % 100;
val = val / 100;
v = ((v / 10) << 4) | (v % 10);
cpu_stb_data_ra(env, mem_ref++, v, GETPC());
access_stb(&ac, mem_ref++, v);
}
while (mem_ref < mem_end) {
cpu_stb_data_ra(env, mem_ref++, 0, GETPC());
access_stb(&ac, mem_ref++, 0);
}
merge_exception_flags(env, old_flags);
}