/* $OpenBSD: fpu_arith.c,v 1.1 1996/08/27 10:32:44 downsj Exp $ */ /* * 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. * * * $FreeBSD: fpu_arith.c,v 1.4 1995/05/30 07:57:43 rgrimes Exp $ * */ #include <sys/param.h> #include <sys/proc.h> #include <machine/cpu.h> #include <machine/pcb.h> #include <gnu/arch/i386/fpemul/fpu_emu.h> #include <gnu/arch/i386/fpemul/fpu_system.h> #include <gnu/arch/i386/fpemul/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(); }