text: /*
   *  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 1.8 1997/06/14 15:11:03 bde Exp $
   *
   */
  
  
  
  
  #include <sys/param.h>
  #include <sys/proc.h>
  #include <machine/pcb.h>
  
  #include <gnu/i386/fpemul/fpu_emu.h>
  #include <gnu/i386/fpemul/fpu_system.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();
  }
  