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[INTERPRETER] Fixed D9 F4 opcode ([DYNAREC] too) (backported from box64)

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This commit is contained in:
ptitSeb 2024-12-03 14:36:23 +01:00
parent e754df0fb1
commit 20432122de
2 changed files with 27 additions and 6 deletions
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18
src/dynarec/dynarec_arm_functions.c
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@ -62,10 +62,20 @@ void arm_fpatan(x86emu_t* emu)
}
void arm_fxtract(x86emu_t* emu)
{
int32_t tmp32s = (ST1.q&0x7ff0000000000000LL)>>52;
tmp32s -= 1023;
ST1.d /= exp2(tmp32s);
ST0.d = tmp32s;
int tmp32s;
if(isnan(ST1.d)) {
ST0.d = ST1.d;
} else if(isinf(ST1.d)) {
ST0.d = ST1.d;
ST1.d = INFINITY;
} else if(ST1.d==0.0) {
ST0.d = ST1.d;
ST1.d = -INFINITY;
} else {
// LD80bits doesn't have implicit "1" bit, so need to adjust for that
ST0.d = frexp(ST1.d, &tmp32s)*2;
ST1.d = tmp32s-1;
}
}
void arm_fprem(x86emu_t* emu)
{

15
src/emu/x86rund9.c
View File

@ -144,9 +144,20 @@ uintptr_t RunD9(x86emu_t *emu, uintptr_t addr)
emu->sw.f.F87_C1 = 0;
break;
case 0xF4: /* FXTRACT */
ST0.d = frexp(ST0.d, &tmp32s);
fpu_do_push(emu);
ST0.d = tmp32s;
if(isnan(ST1.d)) {
ST0.d = ST1.d;
} else if(isinf(ST1.d)) {
ST0.d = ST1.d;
ST1.d = INFINITY;
} else if(ST1.d==0.0) {
ST0.d = ST1.d;
ST1.d = -INFINITY;
} else {
// LD80bits doesn't have implicit "1" bit, so need to adjust for that
ST0.d = frexp(ST1.d, &tmp32s)*2;
ST1.d = tmp32s-1;
}
// C1 set only if stack under/overflow occurs
break;