223 lines
4.8 KiB
C
223 lines
4.8 KiB
C
/*
|
|
* 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 apm233m@vaxc.cc.monash.edu.au
|
|
* All rights reserved.
|
|
*
|
|
* This copyright notice covers the redistribution and use of the
|
|
* FPU emulator developed by W. Metzenthen. It covers only its use
|
|
* in the 386BSD operating system. Any other use is not permitted
|
|
* under this copyright.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must include information specifying
|
|
* that source code for the emulator is freely available and include
|
|
* either:
|
|
* a) an offer to provide the source code for a nominal distribution
|
|
* fee, or
|
|
* b) list at least two alternative methods whereby the source
|
|
* can be obtained, e.g. a publically accessible bulletin board
|
|
* and an anonymous ftp site from which the software can be
|
|
* downloaded.
|
|
* 3. All advertising materials specifically mentioning features or use of
|
|
* this emulator must acknowledge that it was developed by W. Metzenthen.
|
|
* 4. The name of W. Metzenthen may not be used to endorse or promote
|
|
* products derived from this software without specific prior written
|
|
* permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
|
|
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
|
|
* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
|
|
* W. METZENTHEN BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
|
|
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
|
|
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
|
|
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
|
|
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
|
|
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
|
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
*/
|
|
|
|
|
|
|
|
|
|
#include "param.h"
|
|
#include "proc.h"
|
|
#include "machine/cpu.h"
|
|
#include "machine/pcb.h"
|
|
|
|
#include "fpu_emu.h"
|
|
#include "fpu_system.h"
|
|
#include "control_w.h"
|
|
|
|
|
|
void
|
|
fadd__()
|
|
{
|
|
/* fadd st,st(i) */
|
|
reg_add(FPU_st0_ptr, &st(FPU_rm), FPU_st0_ptr, control_word);
|
|
}
|
|
|
|
|
|
void
|
|
fmul__()
|
|
{
|
|
/* fmul st,st(i) */
|
|
reg_mul(FPU_st0_ptr, &st(FPU_rm), FPU_st0_ptr, control_word);
|
|
}
|
|
|
|
|
|
|
|
void
|
|
fsub__()
|
|
{
|
|
/* fsub st,st(i) */
|
|
reg_sub(FPU_st0_ptr, &st(FPU_rm), FPU_st0_ptr, control_word);
|
|
}
|
|
|
|
|
|
void
|
|
fsubr_()
|
|
{
|
|
/* fsubr st,st(i) */
|
|
reg_sub(&st(FPU_rm), FPU_st0_ptr, FPU_st0_ptr, control_word);
|
|
}
|
|
|
|
|
|
void
|
|
fdiv__()
|
|
{
|
|
/* fdiv st,st(i) */
|
|
reg_div(FPU_st0_ptr, &st(FPU_rm), FPU_st0_ptr, control_word);
|
|
}
|
|
|
|
|
|
void
|
|
fdivr_()
|
|
{
|
|
/* fdivr st,st(i) */
|
|
reg_div(&st(FPU_rm), FPU_st0_ptr, FPU_st0_ptr, control_word);
|
|
}
|
|
|
|
|
|
|
|
void
|
|
fadd_i()
|
|
{
|
|
/* fadd st(i),st */
|
|
reg_add(FPU_st0_ptr, &st(FPU_rm), &st(FPU_rm), control_word);
|
|
}
|
|
|
|
|
|
void
|
|
fmul_i()
|
|
{
|
|
/* fmul st(i),st */
|
|
reg_mul(&st(FPU_rm), FPU_st0_ptr, &st(FPU_rm), control_word);
|
|
}
|
|
|
|
|
|
void
|
|
fsubri()
|
|
{
|
|
/* fsubr st(i),st */
|
|
/* This is the sense of the 80486 manual reg_sub(&st(FPU_rm),
|
|
* FPU_st0_ptr, &st(FPU_rm), control_word); */
|
|
reg_sub(FPU_st0_ptr, &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(FPU_st0_ptr,
|
|
* &st(FPU_rm), &st(FPU_rm), control_word); */
|
|
reg_sub(&st(FPU_rm), FPU_st0_ptr, &st(FPU_rm), control_word);
|
|
}
|
|
|
|
|
|
void
|
|
fdivri()
|
|
{
|
|
/* fdivr st(i),st */
|
|
reg_div(FPU_st0_ptr, &st(FPU_rm), &st(FPU_rm), control_word);
|
|
}
|
|
|
|
|
|
void
|
|
fdiv_i()
|
|
{
|
|
/* fdiv st(i),st */
|
|
reg_div(&st(FPU_rm), FPU_st0_ptr, &st(FPU_rm), control_word);
|
|
}
|
|
|
|
|
|
|
|
void
|
|
faddp_()
|
|
{
|
|
/* faddp st(i),st */
|
|
reg_add(FPU_st0_ptr, &st(FPU_rm), &st(FPU_rm), control_word);
|
|
pop();
|
|
}
|
|
|
|
|
|
void
|
|
fmulp_()
|
|
{
|
|
/* fmulp st(i),st */
|
|
reg_mul(&st(FPU_rm), FPU_st0_ptr, &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),
|
|
* FPU_st0_ptr, &st(FPU_rm), control_word); */
|
|
reg_sub(FPU_st0_ptr, &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(FPU_st0_ptr,
|
|
* &st(FPU_rm), &st(FPU_rm), control_word); */
|
|
reg_sub(&st(FPU_rm), FPU_st0_ptr, &st(FPU_rm), control_word);
|
|
pop();
|
|
}
|
|
|
|
|
|
void
|
|
fdivrp()
|
|
{
|
|
/* fdivrp st(i),st */
|
|
reg_div(FPU_st0_ptr, &st(FPU_rm), &st(FPU_rm), control_word);
|
|
pop();
|
|
}
|
|
|
|
|
|
void
|
|
fdivp_()
|
|
{
|
|
/* fdivp st(i),st */
|
|
reg_div(&st(FPU_rm), FPU_st0_ptr, &st(FPU_rm), control_word);
|
|
pop();
|
|
}
|