236 lines
5.2 KiB
C
236 lines
5.2 KiB
C
/*
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* fpu_arith.c
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*
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* Code to implement the FPU register/register arithmetic instructions
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*
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*
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* Copyright (C) 1992,1993,1994
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* W. Metzenthen, 22 Parker St, Ormond, Vic 3163,
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* Australia. E-mail billm@vaxc.cc.monash.edu.au
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* All rights reserved.
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*
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* This copyright notice covers the redistribution and use of the
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* FPU emulator developed by W. Metzenthen. It covers only its use
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* in the 386BSD, FreeBSD and NetBSD operating systems. Any other
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* use is not permitted under this copyright.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must include information specifying
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* that source code for the emulator is freely available and include
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* either:
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* a) an offer to provide the source code for a nominal distribution
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* fee, or
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* b) list at least two alternative methods whereby the source
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* can be obtained, e.g. a publically accessible bulletin board
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* and an anonymous ftp site from which the software can be
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* downloaded.
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* 3. All advertising materials specifically mentioning features or use of
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* this emulator must acknowledge that it was developed by W. Metzenthen.
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* 4. The name of W. Metzenthen may not be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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* W. METZENTHEN BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*
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* The purpose of this copyright, based upon the Berkeley copyright, is to
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* ensure that the covered software remains freely available to everyone.
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*
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* The software (with necessary differences) is also available, but under
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* the terms of the GNU copyleft, for the Linux operating system and for
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* the djgpp ms-dos extender.
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*
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* W. Metzenthen June 1994.
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*
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*
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* $Id: fpu_arith.c,v 1.2 1994/04/29 21:07:14 gclarkii Exp $
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*
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*/
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#include "param.h"
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#include "proc.h"
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#include "machine/cpu.h"
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#include "machine/pcb.h"
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#include "fpu_emu.h"
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#include "fpu_system.h"
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#include "control_w.h"
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void
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fadd__()
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{
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/* fadd st,st(i) */
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reg_add(FPU_st0_ptr, &st(FPU_rm), FPU_st0_ptr, control_word);
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}
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void
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fmul__()
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{
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/* fmul st,st(i) */
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reg_mul(FPU_st0_ptr, &st(FPU_rm), FPU_st0_ptr, control_word);
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}
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void
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fsub__()
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{
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/* fsub st,st(i) */
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reg_sub(FPU_st0_ptr, &st(FPU_rm), FPU_st0_ptr, control_word);
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}
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void
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fsubr_()
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{
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/* fsubr st,st(i) */
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reg_sub(&st(FPU_rm), FPU_st0_ptr, FPU_st0_ptr, control_word);
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}
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void
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fdiv__()
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{
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/* fdiv st,st(i) */
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reg_div(FPU_st0_ptr, &st(FPU_rm), FPU_st0_ptr, control_word);
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}
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void
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fdivr_()
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{
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/* fdivr st,st(i) */
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reg_div(&st(FPU_rm), FPU_st0_ptr, FPU_st0_ptr, control_word);
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}
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void
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fadd_i()
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{
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/* fadd st(i),st */
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reg_add(FPU_st0_ptr, &st(FPU_rm), &st(FPU_rm), control_word);
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}
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void
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fmul_i()
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{
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/* fmul st(i),st */
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reg_mul(&st(FPU_rm), FPU_st0_ptr, &st(FPU_rm), control_word);
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}
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void
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fsubri()
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{
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/* fsubr st(i),st */
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/* This is the sense of the 80486 manual reg_sub(&st(FPU_rm),
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* FPU_st0_ptr, &st(FPU_rm), control_word); */
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reg_sub(FPU_st0_ptr, &st(FPU_rm), &st(FPU_rm), control_word);
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}
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void
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fsub_i()
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{
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/* fsub st(i),st */
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/* This is the sense of the 80486 manual reg_sub(FPU_st0_ptr,
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* &st(FPU_rm), &st(FPU_rm), control_word); */
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reg_sub(&st(FPU_rm), FPU_st0_ptr, &st(FPU_rm), control_word);
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}
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void
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fdivri()
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{
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/* fdivr st(i),st */
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reg_div(FPU_st0_ptr, &st(FPU_rm), &st(FPU_rm), control_word);
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}
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void
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fdiv_i()
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{
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/* fdiv st(i),st */
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reg_div(&st(FPU_rm), FPU_st0_ptr, &st(FPU_rm), control_word);
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}
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void
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faddp_()
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{
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/* faddp st(i),st */
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reg_add(FPU_st0_ptr, &st(FPU_rm), &st(FPU_rm), control_word);
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pop();
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}
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void
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fmulp_()
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{
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/* fmulp st(i),st */
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reg_mul(&st(FPU_rm), FPU_st0_ptr, &st(FPU_rm), control_word);
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pop();
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}
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void
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fsubrp()
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{
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/* fsubrp st(i),st */
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/* This is the sense of the 80486 manual reg_sub(&st(FPU_rm),
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* FPU_st0_ptr, &st(FPU_rm), control_word); */
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reg_sub(FPU_st0_ptr, &st(FPU_rm), &st(FPU_rm), control_word);
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pop();
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}
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void
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fsubp_()
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{
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/* fsubp st(i),st */
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/* This is the sense of the 80486 manual reg_sub(FPU_st0_ptr,
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* &st(FPU_rm), &st(FPU_rm), control_word); */
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reg_sub(&st(FPU_rm), FPU_st0_ptr, &st(FPU_rm), control_word);
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pop();
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}
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void
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fdivrp()
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{
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/* fdivrp st(i),st */
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reg_div(FPU_st0_ptr, &st(FPU_rm), &st(FPU_rm), control_word);
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pop();
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}
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void
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fdivp_()
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{
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/* fdivp st(i),st */
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reg_div(&st(FPU_rm), FPU_st0_ptr, &st(FPU_rm), control_word);
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pop();
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}
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