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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [gcc/] [cppbuiltin.c] - Blame information for rev 791

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1 684 jeremybenn
/* Define builtin-in macros for all front ends that perform preprocessing
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   Copyright (C) 2010
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   Free Software Foundation, Inc.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 3, or (at your option) any later
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version.
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING3.  If not see
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<http://www.gnu.org/licenses/>.  */
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#include "config.h"
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#include "system.h"
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#include "coretypes.h"
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#include "tm.h"
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#include "tree.h"
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#include "version.h"
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#include "flags.h"
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#include "cpp-id-data.h"
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#include "cppbuiltin.h"
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#include "target.h"
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/* Parse a BASEVER version string of the format "major.minor.patchlevel"
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   or "major.minor" to extract its components.  */
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void
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parse_basever (int *major, int *minor, int *patchlevel)
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{
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  static int s_major = -1, s_minor, s_patchlevel;
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  if (s_major == -1)
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    if (sscanf (BASEVER, "%d.%d.%d", &s_major, &s_minor, &s_patchlevel) != 3)
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      {
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        sscanf (BASEVER, "%d.%d", &s_major, &s_minor);
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        s_patchlevel = 0;
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      }
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  if (major)
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    *major = s_major;
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  if (minor)
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    *minor = s_minor;
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  if (patchlevel)
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    *patchlevel = s_patchlevel;
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}
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/* Define __GNUC__, __GNUC_MINOR__, __GNUC_PATCHLEVEL__ and __VERSION__.  */
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static void
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define__GNUC__ (cpp_reader *pfile)
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{
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  int major, minor, patchlevel;
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  parse_basever (&major, &minor, &patchlevel);
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  cpp_define_formatted (pfile, "__GNUC__=%d", major);
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  cpp_define_formatted (pfile, "__GNUC_MINOR__=%d", minor);
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  cpp_define_formatted (pfile, "__GNUC_PATCHLEVEL__=%d", patchlevel);
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  cpp_define_formatted (pfile, "__VERSION__=\"%s\"", version_string);
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  cpp_define_formatted (pfile, "__ATOMIC_RELAXED=%d", MEMMODEL_RELAXED);
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  cpp_define_formatted (pfile, "__ATOMIC_SEQ_CST=%d", MEMMODEL_SEQ_CST);
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  cpp_define_formatted (pfile, "__ATOMIC_ACQUIRE=%d", MEMMODEL_ACQUIRE);
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  cpp_define_formatted (pfile, "__ATOMIC_RELEASE=%d", MEMMODEL_RELEASE);
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  cpp_define_formatted (pfile, "__ATOMIC_ACQ_REL=%d", MEMMODEL_ACQ_REL);
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  cpp_define_formatted (pfile, "__ATOMIC_CONSUME=%d", MEMMODEL_CONSUME);
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}
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/* Define various built-in CPP macros that depend on language-independent
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   compilation flags.  */
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static void
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define_builtin_macros_for_compilation_flags (cpp_reader *pfile)
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{
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  if (flag_pic)
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    {
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      cpp_define_formatted (pfile, "__pic__=%d", flag_pic);
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      cpp_define_formatted (pfile, "__PIC__=%d", flag_pic);
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    }
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  if (flag_pie)
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    {
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      cpp_define_formatted (pfile, "__pie__=%d", flag_pie);
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      cpp_define_formatted (pfile, "__PIE__=%d", flag_pie);
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    }
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  if (optimize_size)
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    cpp_define (pfile, "__OPTIMIZE_SIZE__");
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  if (optimize)
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    cpp_define (pfile, "__OPTIMIZE__");
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  if (fast_math_flags_set_p (&global_options))
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    cpp_define (pfile, "__FAST_MATH__");
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  if (flag_signaling_nans)
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    cpp_define (pfile, "__SUPPORT_SNAN__");
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  cpp_define_formatted (pfile, "__FINITE_MATH_ONLY__=%d",
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                        flag_finite_math_only);
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}
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/* Define built-in macros for LP64 targets. */
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static void
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define_builtin_macros_for_lp64 (cpp_reader *pfile)
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{
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  if (TYPE_PRECISION (long_integer_type_node) == 64
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      && POINTER_SIZE == 64
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      && TYPE_PRECISION (integer_type_node) == 32)
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    {
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      cpp_define (pfile, "_LP64");
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      cpp_define (pfile, "__LP64__");
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    }
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}
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/* Define macros for size of basic C types.  */
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static void
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define_builtin_macros_for_type_sizes (cpp_reader *pfile)
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{
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#define define_type_sizeof(NAME, TYPE)                             \
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    cpp_define_formatted (pfile, NAME"="HOST_WIDE_INT_PRINT_DEC,   \
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                          tree_low_cst (TYPE_SIZE_UNIT (TYPE), 1))
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  define_type_sizeof ("__SIZEOF_INT__", integer_type_node);
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  define_type_sizeof ("__SIZEOF_LONG__", long_integer_type_node);
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  define_type_sizeof ("__SIZEOF_LONG_LONG__", long_long_integer_type_node);
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  define_type_sizeof ("__SIZEOF_SHORT__", short_integer_type_node);
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  define_type_sizeof ("__SIZEOF_FLOAT__", float_type_node);
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  define_type_sizeof ("__SIZEOF_DOUBLE__", double_type_node);
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  define_type_sizeof ("__SIZEOF_LONG_DOUBLE__", long_double_type_node);
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  define_type_sizeof ("__SIZEOF_SIZE_T__", size_type_node);
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#undef define_type_sizeof
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  cpp_define_formatted (pfile, "__CHAR_BIT__=%u",
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                        TYPE_PRECISION (char_type_node));
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  cpp_define_formatted (pfile, "__BIGGEST_ALIGNMENT__=%d",
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                        BIGGEST_ALIGNMENT / BITS_PER_UNIT);
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  /* Define constants useful for implementing endian.h.  */
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  cpp_define (pfile, "__ORDER_LITTLE_ENDIAN__=1234");
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  cpp_define (pfile, "__ORDER_BIG_ENDIAN__=4321");
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  cpp_define (pfile, "__ORDER_PDP_ENDIAN__=3412");
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  if (WORDS_BIG_ENDIAN == BYTES_BIG_ENDIAN)
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    cpp_define_formatted (pfile, "__BYTE_ORDER__=%s",
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                          (WORDS_BIG_ENDIAN
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                           ? "__ORDER_BIG_ENDIAN__"
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                           : "__ORDER_LITTLE_ENDIAN__"));
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  else
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    {
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      /* Assert that we're only dealing with the PDP11 case.  */
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      gcc_assert (!BYTES_BIG_ENDIAN);
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      gcc_assert (WORDS_BIG_ENDIAN);
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      cpp_define (pfile, "__BYTE_ORDER__=__ORDER_PDP_ENDIAN__");
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    }
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  cpp_define_formatted (pfile, "__FLOAT_WORD_ORDER__=%s",
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                        (targetm.float_words_big_endian ()
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                         ? "__ORDER_BIG_ENDIAN__"
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                         : "__ORDER_LITTLE_ENDIAN__"));
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  /* ptr_type_node can't be used here since ptr_mode is only set when
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     toplev calls backend_init which is not done with -E switch.  */
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  cpp_define_formatted (pfile, "__SIZEOF_POINTER__=%d",
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                        POINTER_SIZE / BITS_PER_UNIT);
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}
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/* Define macros builtins common to all language performing CPP
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   preprocessing.  */
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void
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define_language_independent_builtin_macros (cpp_reader *pfile)
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{
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  define__GNUC__ (pfile);
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  define_builtin_macros_for_compilation_flags (pfile);
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  define_builtin_macros_for_lp64 (pfile);
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  define_builtin_macros_for_type_sizes (pfile);
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}

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