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|
/*---------------------------------------------------------------------------+
| fpu_arith.c |
| |
| Code to implement the FPU register/register arithmetic instructions |
| |
| Copyright (C) 1992,1993 |
| W. Metzenthen, 22 Parker St, Ormond, Vic 3163, |
| Australia. E-mail billm@vaxc.cc.monash.edu.au |
| |
| |
+---------------------------------------------------------------------------*/
#include "fpu_system.h"
#include "fpu_emu.h"
#include "control_w.h"
#include "status_w.h"
void fadd__()
{
/* fadd st,st(i) */
clear_C1();
reg_add(&st(0), &st(FPU_rm), &st(0), control_word);
}
void fmul__()
{
/* fmul st,st(i) */
clear_C1();
reg_mul(&st(0), &st(FPU_rm), &st(0), control_word);
}
void fsub__()
{
/* fsub st,st(i) */
clear_C1();
reg_sub(&st(0), &st(FPU_rm), &st(0), control_word);
}
void fsubr_()
{
/* fsubr st,st(i) */
clear_C1();
reg_sub(&st(FPU_rm), &st(0), &st(0), control_word);
}
void fdiv__()
{
/* fdiv st,st(i) */
clear_C1();
reg_div(&st(0), &st(FPU_rm), &st(0), control_word);
}
void fdivr_()
{
/* fdivr st,st(i) */
clear_C1();
reg_div(&st(FPU_rm), &st(0), &st(0), control_word);
}
void fadd_i()
{
/* fadd st(i),st */
clear_C1();
reg_add(&st(0), &st(FPU_rm), &st(FPU_rm), control_word);
}
void fmul_i()
{
/* fmul st(i),st */
clear_C1();
reg_mul(&st(0), &st(FPU_rm), &st(FPU_rm), control_word);
}
void fsubri()
{
/* fsubr st(i),st */
/* This is the sense of the 80486 manual
reg_sub(&st(FPU_rm), &st(0), &st(FPU_rm), control_word); */
clear_C1();
reg_sub(&st(0), &st(FPU_rm), &st(FPU_rm), control_word);
}
void fsub_i()
{
/* fsub st(i),st */
/* This is the sense of the 80486 manual
reg_sub(&st(0), &st(FPU_rm), &st(FPU_rm), control_word); */
clear_C1();
reg_sub(&st(FPU_rm), &st(0), &st(FPU_rm), control_word);
}
void fdivri()
{
/* fdivr st(i),st */
clear_C1();
reg_div(&st(0), &st(FPU_rm), &st(FPU_rm), control_word);
}
void fdiv_i()
{
/* fdiv st(i),st */
clear_C1();
reg_div(&st(FPU_rm), &st(0), &st(FPU_rm), control_word);
}
void faddp_()
{
/* faddp st(i),st */
clear_C1();
if ( !reg_add(&st(0), &st(FPU_rm), &st(FPU_rm), control_word) )
pop();
}
void fmulp_()
{
/* fmulp st(i),st */
clear_C1();
if ( !reg_mul(&st(0), &st(FPU_rm), &st(FPU_rm), control_word) )
pop();
}
void fsubrp()
{
/* fsubrp st(i),st */
/* This is the sense of the 80486 manual
reg_sub(&st(FPU_rm), &st(0), &st(FPU_rm), control_word); */
clear_C1();
if ( !reg_sub(&st(0), &st(FPU_rm), &st(FPU_rm), control_word) )
pop();
}
void fsubp_()
{
/* fsubp st(i),st */
/* This is the sense of the 80486 manual
reg_sub(&st(0), &st(FPU_rm), &st(FPU_rm), control_word); */
clear_C1();
if ( !reg_sub(&st(FPU_rm), &st(0), &st(FPU_rm), control_word) )
pop();
}
void fdivrp()
{
/* fdivrp st(i),st */
clear_C1();
if ( !reg_div(&st(0), &st(FPU_rm), &st(FPU_rm), control_word) )
pop();
}
void fdivp_()
{
/* fdivp st(i),st */
clear_C1();
if ( !reg_div(&st(FPU_rm), &st(0), &st(FPU_rm), control_word) )
pop();
}
|
