text: /* Intel 80960 specific, C compiler specific functions.
     Copyright (C) 1992, 1995, 1996, 1997, 1998, 1999, 2000
     Free Software Foundation, Inc.
     Contributed by Steven McGeady, Intel Corp.
     Additional Work by Glenn Colon-Bonet, Jonathan Shapiro, Andy Wilson
     Converted to GCC 2.0 by Jim Wilson and Michael Tiemann, Cygnus Support.
  
  This file is part of GNU CC.
  
  GNU CC is free software; you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation; either version 2, or (at your option)
  any later version.
  
  GNU CC is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.
  
  You should have received a copy of the GNU General Public License
  along with GNU CC; see the file COPYING.  If not, write to
  the Free Software Foundation, 59 Temple Place - Suite 330,
  Boston, MA 02111-1307, USA.  */
  
  #include "config.h"
  #include "system.h"
  #include "cpplib.h"
  #include "tree.h"
  #include "c-pragma.h"
  #include "c-lex.h"
  #include "toplev.h"
  #include "ggc.h"
  #include "tm_p.h"
  
  /* Handle pragmas for compatibility with Intel's compilers.  */
  
  /* NOTE: ic960 R3.0 pragma align definition:
  
     #pragma align [(size)] | (identifier=size[,...])
     #pragma noalign [(identifier)[,...]]
       
     (all parens are optional)
       
     - size is [1,2,4,8,16]
     - noalign means size==1
     - applies only to component elements of a struct (and union?)
     - identifier applies to structure tag (only)
     - missing identifier means next struct
       
     - alignment rules for bitfields need more investigation.
  
     This implementation only handles the case of no identifiers.  */
  
  void
  i960_pr_align (pfile)
       cpp_reader *pfile ATTRIBUTE_UNUSED;
  {
    tree number;
    enum cpp_ttype type;
    int align;
  
    type = c_lex (&number);
    if (type == CPP_OPEN_PAREN)
      type = c_lex (&number);
    if (type == CPP_NAME)
      {
        warning ("sorry, not implemented: #pragma align NAME=SIZE");
        return;
      }
    if (type != CPP_NUMBER)
      {
        warning ("malformed #pragma align - ignored");
        return;
      }
  
    align = TREE_INT_CST_LOW (number);
    switch (align)
      {
      case 0:
        /* Return to last alignment.  */
        align = i960_last_maxbitalignment / 8;
        /* Fall through.  */
      case 16:
      case 8:
      case 4:
      case 2:
      case 1:
        i960_last_maxbitalignment = i960_maxbitalignment;
        i960_maxbitalignment = align * 8;
        break;
        
      default:
        /* Silently ignore bad values.  */
        break;
      }
  }
  
  void
  i960_pr_noalign (pfile)
       cpp_reader *pfile ATTRIBUTE_UNUSED;
  {
    enum cpp_ttype type;
    tree number;
  
    type = c_lex (&number);
    if (type == CPP_OPEN_PAREN)
      type = c_lex (&number);
    if (type == CPP_NAME)
      {
        warning ("sorry, not implemented: #pragma noalign NAME");
        return;
      }
  
    i960_last_maxbitalignment = i960_maxbitalignment;
    i960_maxbitalignment = 8;
  }
  