sys/gnu/fpemul/fpu_arith.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.
 *
 *
 *     $Id:$
 *
 */


#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();
}