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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();
}