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/*
* fpu_arith.c
*
* Code to implement the FPU register/register arithmetic instructions
*
*
* Copyright (C) 1992,1993,1994
* W. Metzenthen, 22 Parker St, Ormond, Vic 3163,
* Australia. E-mail billm@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, FreeBSD and NetBSD operating systems. 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.
*
*
* The purpose of this copyright, based upon the Berkeley copyright, is to
* ensure that the covered software remains freely available to everyone.
*
* The software (with necessary differences) is also available, but under
* the terms of the GNU copyleft, for the Linux operating system and for
* the djgpp ms-dos extender.
*
* W. Metzenthen June 1994.
*
*
* $Id: fpu_arith.c,v 1.2 1994/04/29 21:07:14 gclarkii Exp $
*
*/
#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();
}
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