diff options
Diffstat (limited to 'sys/gnu/fpemul/fpu_arith.c')
| -rw-r--r-- | sys/gnu/fpemul/fpu_arith.c | 235 |
1 files changed, 235 insertions, 0 deletions
diff --git a/sys/gnu/fpemul/fpu_arith.c b/sys/gnu/fpemul/fpu_arith.c new file mode 100644 index 000000000000..0ffb6615e70b --- /dev/null +++ b/sys/gnu/fpemul/fpu_arith.c @@ -0,0 +1,235 @@ +/* + * 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 1.3 1994/06/10 07:44:14 rich 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(); +} |