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/* 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 "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;
}
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