isa_hazards.cxx

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/*

  Copyright (C) 2000, 2001 Silicon Graphics, Inc.  All Rights Reserved.

  This program is free software; you can redistribute it and/or modify it
  under the terms of version 2 of the GNU General Public License as
  published by the Free Software Foundation.

  This program is distributed in the hope that it would be useful, but
  WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  

  Further, this software is distributed without any warranty that it is
  free of the rightful claim of any third person regarding infringement 
  or the like.  Any license provided herein, whether implied or 
  otherwise, applies only to this software file.  Patent licenses, if 
  any, provided herein do not apply to combinations of this program with 
  other software, or any other product whatsoever.  

  You should have received a copy of the GNU General Public License along
  with this program; if not, write the Free Software Foundation, Inc., 59
  Temple Place - Suite 330, Boston MA 02111-1307, USA.

  Contact information:  Silicon Graphics, Inc., 1600 Amphitheatre Pky,
  Mountain View, CA 94043, or:

  http://www.sgi.com

  For further information regarding this notice, see:

  http://oss.sgi.com/projects/GenInfo/NoticeExplan

*/


//  
//  Generate ISA hazard information
//  
//  Generate ISA hazard information
//
//  Note:  A "hazard" is a conflict between instructions which may
//  cause unexpected behavior if the instructions appear at a forbidden
//  distance in the instruction stream.  That is, the hardware does not
//  enforce the required separation, and the software is responsible
//  for avoiding such situations.  Most are avoided via the resource
//  mechanism.  This file handles special cases.
//



#include <stddef.h>
#include "topcode.h"
#include "targ_isa_subset.h"
#include "isa_hazards_gen.h"


/* Indicate a hazard is applicable to all ISA subsets.
 */
static void isa_all(void)
{
  ISA_SUBSET subset;

  for ( subset = ISA_SUBSET_MIN; 
        subset <= ISA_SUBSET_MAX;
        subset = (ISA_SUBSET)((int)subset + 1) 
  ) {
    Hazard_ISA(subset);
  }
}


/* Indicate a hazard is applicable to the specified and preceding
 * (older) ISA subsets.
 */
static void isa_down(ISA_SUBSET isa)
{
  ISA_SUBSET subset;

  for ( subset = isa;
        subset >= ISA_SUBSET_MIN;
        subset = (ISA_SUBSET)((int)subset - 1) 
  ) {
    Hazard_ISA(subset);
  }
}


/* Indicate a hazard is applicable to the specified and succeeding
 * (newer) ISA subsets.
 */
static void isa_up(ISA_SUBSET isa)
{
  ISA_SUBSET subset;

  for ( subset = isa;
        subset <= ISA_SUBSET_MAX;
        subset = (ISA_SUBSET)((int)subset + 1) 
  ) {
    Hazard_ISA(subset);
  }
}


main()
{
  ISA_HAZARD
    result,
    operand,
    errata;

  ISA_Hazards_Begin("ia64");

  result = Hazard_Create("result");
  operand = Hazard_Create("operand");
  errata = Hazard_Create("errata");

  ISA_Hazards_End();
  return 0;
}