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|
/*---------------------------------------------------------------------------+
| fpu_arith.c |
| |
| Code to implement the FPU register/register arithmetic instructions |
| |
| Copyright (C) 1992,1993,1997 |
| W. Metzenthen, 22 Parker St, Ormond, Vic 3163, Australia |
| E-mail billm@suburbia.net |
| |
| |
+---------------------------------------------------------------------------*/
#include "fpu_system.h"
#include "fpu_emu.h"
#include "control_w.h"
#include "status_w.h"
void fadd__(void)
{
/* fadd st,st(i) */
int i = FPU_rm;
clear_C1();
FPU_add(&st(i), FPU_gettagi(i), 0, control_word);
}
void fmul__(void)
{
/* fmul st,st(i) */
int i = FPU_rm;
clear_C1();
FPU_mul(&st(i), FPU_gettagi(i), 0, control_word);
}
void fsub__(void)
{
/* fsub st,st(i) */
clear_C1();
FPU_sub(0, FPU_rm, control_word);
}
void fsubr_(void)
{
/* fsubr st,st(i) */
clear_C1();
FPU_sub(REV, FPU_rm, control_word);
}
void fdiv__(void)
{
/* fdiv st,st(i) */
clear_C1();
FPU_div(0, FPU_rm, control_word);
}
void fdivr_(void)
{
/* fdivr st,st(i) */
clear_C1();
FPU_div(REV, FPU_rm, control_word);
}
void fadd_i(void)
{
/* fadd st(i),st */
int i = FPU_rm;
clear_C1();
FPU_add(&st(i), FPU_gettagi(i), i, control_word);
}
void fmul_i(void)
{
/* fmul st(i),st */
clear_C1();
FPU_mul(&st(0), FPU_gettag0(), FPU_rm, control_word);
}
void fsubri(void)
{
/* fsubr st(i),st */
clear_C1();
FPU_sub(DEST_RM, FPU_rm, control_word);
}
void fsub_i(void)
{
/* fsub st(i),st */
clear_C1();
FPU_sub(REV | DEST_RM, FPU_rm, control_word);
}
void fdivri(void)
{
/* fdivr st(i),st */
clear_C1();
FPU_div(DEST_RM, FPU_rm, control_word);
}
void fdiv_i(void)
{
/* fdiv st(i),st */
clear_C1();
FPU_div(REV | DEST_RM, FPU_rm, control_word);
}
void faddp_(void)
{
/* faddp st(i),st */
int i = FPU_rm;
clear_C1();
if (FPU_add(&st(i), FPU_gettagi(i), i, control_word) >= 0)
FPU_pop();
}
void fmulp_(void)
{
/* fmulp st(i),st */
clear_C1();
if (FPU_mul(&st(0), FPU_gettag0(), FPU_rm, control_word) >= 0)
FPU_pop();
}
void fsubrp(void)
{
/* fsubrp st(i),st */
clear_C1();
if (FPU_sub(DEST_RM, FPU_rm, control_word) >= 0)
FPU_pop();
}
void fsubp_(void)
{
/* fsubp st(i),st */
clear_C1();
if (FPU_sub(REV | DEST_RM, FPU_rm, control_word) >= 0)
FPU_pop();
}
void fdivrp(void)
{
/* fdivrp st(i),st */
clear_C1();
if (FPU_div(DEST_RM, FPU_rm, control_word) >= 0)
FPU_pop();
}
void fdivp_(void)
{
/* fdivp st(i),st */
clear_C1();
if (FPU_div(REV | DEST_RM, FPU_rm, control_word) >= 0)
FPU_pop();
}
|
