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#ifndef __X87RUN_PRIVATE_H_
#define __X87RUN_PRIVATE_H_
#include <stdint.h>
#include <math.h>
#include "regs.h"
#include "x64run_private.h"
#include "debug.h"
typedef struct x64emu_s x64emu_t;
#define PI 3.14159265358979323846
#define L2E 1.4426950408889634
#define L2T 3.3219280948873623
#define LN2 0.69314718055994531
#define LG2 0.3010299956639812
#define ST0 emu->x87[emu->top]
#define ST1 emu->x87[(emu->top+1)&7]
#define ST(a) emu->x87[(emu->top+(a))&7]
#define STld(a) emu->fpu_ld[(emu->top+(a))&7]
#define STll(a) emu->fpu_ll[(emu->top+(a))&7]
static inline void fpu_do_push(x64emu_t* emu)
{
int newtop = (emu->top-1)&7;
/*if(emu->p_regs[newtop].tag!=0b11) {// not empty, overflow!
printf_log(LOG_NONE, "Warning: %p: FPU Stack overflow\n", (void*)emu->old_ip); // probably better to raise something
//emu->quit = 1;
return;
}*/
if(emu->fpu_stack<8)
++emu->fpu_stack;
emu->p_regs[newtop].tag = 0; // full
emu->top = newtop;
}
static inline void fpu_do_pop(x64emu_t* emu)
{
int curtop = (emu->top)&7;
/*if(emu->p_regs[(emu->top)&7].tag==0b11) {// underflow
printf_log(LOG_NONE, "Warning: %p: FPU Stack underflow\n", (void*)emu->old_ip); // probably better to raise something
//emu->quit = 1;
return;
}*/
if(emu->fpu_stack>0)
--emu->fpu_stack;
emu->p_regs[curtop].tag = 0b11; // empty
emu->top = (emu->top+1)&7;
}
void fpu_do_free(x64emu_t* emu, int i);
void reset_fpu(x64emu_t* emu);
static inline void fpu_fcom(x64emu_t* emu, double b)
{
emu->sw.f.F87_C1 = 0;
if(isnan(ST0.d) || isnan(b)) {
emu->sw.f.F87_C0 = 1;
emu->sw.f.F87_C2 = 1;
emu->sw.f.F87_C3 = 1;
} else if (isgreater(ST0.d, b)) {
emu->sw.f.F87_C0 = 0;
emu->sw.f.F87_C2 = 0;
emu->sw.f.F87_C3 = 0;
} else if (isless(ST0.d, b)) {
emu->sw.f.F87_C0 = 1;
emu->sw.f.F87_C2 = 0;
emu->sw.f.F87_C3 = 0;
}
else {
emu->sw.f.F87_C0 = 0;
emu->sw.f.F87_C2 = 0;
emu->sw.f.F87_C3 = 1;
}
}
static inline void fpu_fcomi(x64emu_t* emu, double b)
{
RESET_FLAGS(emu);
CLEAR_FLAG(F_AF);
CLEAR_FLAG(F_OF);
CLEAR_FLAG(F_SF);
emu->sw.f.F87_C1 = 0;
if(isnan(ST0.d) || isnan(b)) {
SET_FLAG(F_CF);
SET_FLAG(F_PF);
SET_FLAG(F_ZF);
} else if (isgreater(ST0.d, b)) {
CLEAR_FLAG(F_CF);
CLEAR_FLAG(F_PF);
CLEAR_FLAG(F_ZF);
} else if (isless(ST0.d, b)) {
SET_FLAG(F_CF);
CLEAR_FLAG(F_PF);
CLEAR_FLAG(F_ZF);
}
else {
CLEAR_FLAG(F_CF);
CLEAR_FLAG(F_PF);
SET_FLAG(F_ZF);
}
}
static inline double fpu_round(x64emu_t* emu, double d) {
if (!isfinite(d))
return d;
switch(emu->round) {
case ROUND_Nearest:
return nearbyint(d);
case ROUND_Down:
return floor(d);
case ROUND_Up:
return ceil(d);
case ROUND_Chop:
default:
return trunc(d);
}
}
static inline void fpu_fxam(x64emu_t* emu) {
emu->sw.f.F87_C1 = (ST0.ud[1]&0x80000000)?1:0;
if(!emu->fpu_stack) {
emu->sw.f.F87_C3 = 1;
emu->sw.f.F87_C2 = 0;
emu->sw.f.F87_C0 = 1;
return;
}
if(isinf(ST0.d))
{ // TODO: Unsuported and denormal not analysed...
emu->sw.f.F87_C3 = 0;
emu->sw.f.F87_C2 = 1;
emu->sw.f.F87_C0 = 1;
return;
}
if(isnan(ST0.d))
{ // TODO: Unsuported and denormal not analysed...
emu->sw.f.F87_C3 = 0;
emu->sw.f.F87_C2 = 0;
emu->sw.f.F87_C0 = 1;
return;
}
if(ST0.d==0.0)
{
emu->sw.f.F87_C3 = 1;
emu->sw.f.F87_C2 = 0;
emu->sw.f.F87_C0 = 0;
return;
}
// normal...
emu->sw.f.F87_C3 = 0;
emu->sw.f.F87_C2 = 1;
emu->sw.f.F87_C0 = 0;
}
static inline void fpu_ftst(x64emu_t* emu) {
emu->sw.f.F87_C1 = 0;
if(isinf(ST0.d) || isnan(ST0.d))
{ // TODO: Unsuported and denormal not analysed...
emu->sw.f.F87_C3 = 1;
emu->sw.f.F87_C2 = 1;
emu->sw.f.F87_C0 = 1;
return;
}
if(ST0.d==0.0)
{
emu->sw.f.F87_C3 = 1;
emu->sw.f.F87_C2 = 0;
emu->sw.f.F87_C0 = 0;
return;
}
// normal...
emu->sw.f.F87_C3 = 0;
emu->sw.f.F87_C2 = 0;
emu->sw.f.F87_C0 = (ST0.ud[1]&0x80000000)?1:0;
}
void fpu_fbst(x64emu_t* emu, uint8_t* d);
void fpu_fbld(x64emu_t* emu, uint8_t* s);
void fpu_loadenv(x64emu_t* emu, char* p, int b16);
void fpu_savenv(x64emu_t* emu, char* p, int b16);
void fpu_fxsave32(x64emu_t* emu, void* ed);
void fpu_fxrstor32(x64emu_t* emu, void* ed);
void fpu_fxsave64(x64emu_t* emu, void* ed);
void fpu_fxrstor64(x64emu_t* emu, void* ed);
#endif //__X87RUN_PRIVATE_H_
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