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/* Subroutines for the C front end on the POWER and PowerPC architectures.
Copyright (C) 2002
Free Software Foundation, Inc.
Contributed by Zack Weinberg <zack@codesourcery.com>
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-lex.h"
#include "errors.h"
#include "tm_p.h"
/* Handle the machine specific pragma longcall. Its syntax is
# pragma longcall ( TOGGLE )
where TOGGLE is either 0 or 1.
rs6000_default_long_calls is set to the value of TOGGLE, changing
whether or not new function declarations receive a longcall
attribute by default. */
#define SYNTAX_ERROR(msgid) do { \
warning (msgid); \
warning ("ignoring malformed #pragma longcall"); \
return; \
} while (0)
void
rs6000_pragma_longcall (pfile)
cpp_reader *pfile ATTRIBUTE_UNUSED;
{
tree x, n;
/* If we get here, generic code has already scanned the directive
leader and the word "longcall". */
if (c_lex (&x) != CPP_OPEN_PAREN)
SYNTAX_ERROR ("missing open paren");
if (c_lex (&n) != CPP_NUMBER)
SYNTAX_ERROR ("missing number");
if (c_lex (&x) != CPP_CLOSE_PAREN)
SYNTAX_ERROR ("missing close paren");
if (n != integer_zero_node && n != integer_one_node)
SYNTAX_ERROR ("number must be 0 or 1");
if (c_lex (&x) != CPP_EOF)
warning ("junk at end of #pragma longcall");
rs6000_default_long_calls = (n == integer_one_node);
}
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