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#define _GNU_SOURCE
#include <fenv.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <string.h>
#include <signal.h>
#include <sys/types.h>
#include <unistd.h>
#include "debug.h"
#include "box64stack.h"
#include "x64emu.h"
#include "x64emu_private.h"
#include "x64run_private.h"
#include "x64primop.h"
#include "x64trace.h"
#include "x87emu_private.h"
#include "x87emu_setround.h"
#include "box64context.h"
#include "bridge.h"
#include "modrm.h"
#ifdef TEST_INTERPRETER
uintptr_t TestDB(x64test_t *test, rex_t rex, uintptr_t addr)
#else
uintptr_t RunDB(x64emu_t *emu, rex_t rex, uintptr_t addr)
#endif
{
uint8_t nextop;
int32_t tmp32s;
reg64_t *oped;
#ifdef TEST_INTERPRETER
x64emu_t*emu = test->emu;
#endif
int oldround = fpu_setround(emu);
nextop = F8;
if(MODREG)
switch(nextop) {
case 0xC0: /* FCMOVNB ST(0), ST(i) */
case 0xC1:
case 0xC2:
case 0xC3:
case 0xC4:
case 0xC5:
case 0xC6:
case 0xC7:
CHECK_FLAGS(emu);
if(!ACCESS_FLAG(F_CF))
ST0.q = ST(nextop&7).q;
break;
case 0xC8: /* FCMOVNE ST(0), ST(i) */
case 0xC9:
case 0xCA:
case 0xCB:
case 0xCC:
case 0xCD:
case 0xCE:
case 0xCF:
CHECK_FLAGS(emu);
if(!ACCESS_FLAG(F_ZF))
ST0.q = ST(nextop&7).q;
break;
case 0xD0: /* FCMOVNBE ST(0), ST(i) */
case 0xD1:
case 0xD2:
case 0xD3:
case 0xD4:
case 0xD5:
case 0xD6:
case 0xD7:
CHECK_FLAGS(emu);
if(!(ACCESS_FLAG(F_CF) || ACCESS_FLAG(F_ZF)))
ST0.q = ST(nextop&7).q;
break;
case 0xD8: /* FCMOVNU ST(0), ST(i) */
case 0xD9:
case 0xDA:
case 0xDB:
case 0xDC:
case 0xDD:
case 0xDE:
case 0xDF:
CHECK_FLAGS(emu);
if(!ACCESS_FLAG(F_PF))
ST0.q = ST(nextop&7).q;
break;
case 0xE1: /* FDISI8087_NOP */
break;
case 0xE2: /* FNCLEX */
//Clears the floating-point exception flags (PE, UE, OE, ZE, DE, and IE),
// the exception summary status flag (ES), the stack fault flag (SF), and the busy flag (B) in the FPU status word
emu->sw.f.F87_PE = 0;
emu->sw.f.F87_UE = 0;
emu->sw.f.F87_OE = 0;
emu->sw.f.F87_ZE = 0;
emu->sw.f.F87_DE = 0;
emu->sw.f.F87_IE = 0;
emu->sw.f.F87_ES = 0;
emu->sw.f.F87_SF = 0;
emu->sw.f.F87_B = 0;
break;
case 0xE3: /* FNINIT */
reset_fpu(emu);
break;
case 0xE8: /* FUCOMI ST0, STx */
case 0xE9:
case 0xEA:
case 0xEB:
case 0xEC:
case 0xED:
case 0xEE:
case 0xEF:
fpu_fcomi(emu, ST(nextop&7).d); // bad, should handle QNaN and IA interrupt
break;
case 0xF0: /* FCOMI ST0, STx */
case 0xF1:
case 0xF2:
case 0xF3:
case 0xF4:
case 0xF5:
case 0xF6:
case 0xF7:
fpu_fcomi(emu, ST(nextop&7).d);
break;
default:
fesetround(oldround);
return 0;
} else
switch((nextop>>3)&7) {
case 0: /* FILD ST0, Ed */
GETE4(0);
fpu_do_push(emu);
ST0.d = ED->sdword[0];
break;
case 1: /* FISTTP Ed, ST0 */
GETE4(0);
if(isgreater(ST0.d, (double)0x7fffffff) || isless(ST0.d, -(double)0x80000000U) || !isfinite(ST0.d))
ED->sdword[0] = 0x80000000;
else
ED->sdword[0] = ST0.d;
fpu_do_pop(emu);
break;
case 2: /* FIST Ed, ST0 */
GETE4(0);
if(isgreater(ST0.d, (double)0x7fffffff) || isless(ST0.d, -(double)0x80000000U) || !isfinite(ST0.d))
ED->sdword[0] = 0x80000000;
else {
volatile int32_t tmp = fpu_round(emu, ST0.d); // tmp to avoid BUS ERROR
ED->sdword[0] = tmp;
}
break;
case 3: /* FISTP Ed, ST0 */
GETE4(0);
if(isgreater(ST0.d, (double)0x7fffffff) || isless(ST0.d, -(double)0x80000000U) || !isfinite(ST0.d))
ED->sdword[0] = 0x80000000;
else {
volatile int32_t tmp = fpu_round(emu, ST0.d); // tmp to avoid BUS ERROR
ED->sdword[0] = tmp;
}
fpu_do_pop(emu);
break;
case 5: /* FLD ST0, Et */
GETET(0);
fpu_do_push(emu);
memcpy(&STld(0).ld, ED, 10);
LD2D(&STld(0), &ST(0).d);
STld(0).uref = ST0.q;
break;
case 7: /* FSTP tbyte */
GETET(0);
if(STld(0).uref && (ST0.q==STld(0).uref))
memcpy(ED, &STld(0).ld, 10);
else
D2LD(&ST0.d, ED);
fpu_do_pop(emu);
break;
default:
fesetround(oldround);
return 0;
}
fesetround(oldround);
return addr;
}
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