Mercurial > hg > CbC > CbC_gcc
comparison gcc/cppbuiltin.c @ 68:561a7518be6b
update gcc-4.6
author | Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> |
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date | Sun, 21 Aug 2011 07:07:55 +0900 |
parents | |
children | 04ced10e8804 |
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67:f6334be47118 | 68:561a7518be6b |
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1 /* Define builtin-in macros for all front ends that perform preprocessing | |
2 Copyright (C) 2010 | |
3 Free Software Foundation, Inc. | |
4 | |
5 This file is part of GCC. | |
6 | |
7 GCC is free software; you can redistribute it and/or modify it under | |
8 the terms of the GNU General Public License as published by the Free | |
9 Software Foundation; either version 3, or (at your option) any later | |
10 version. | |
11 | |
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
15 for more details. | |
16 | |
17 You should have received a copy of the GNU General Public License | |
18 along with GCC; see the file COPYING3. If not see | |
19 <http://www.gnu.org/licenses/>. */ | |
20 | |
21 #include "config.h" | |
22 #include "system.h" | |
23 #include "coretypes.h" | |
24 #include "tm.h" | |
25 #include "tree.h" | |
26 #include "version.h" | |
27 #include "flags.h" | |
28 #include "cpp-id-data.h" | |
29 #include "cppbuiltin.h" | |
30 #include "target.h" | |
31 | |
32 | |
33 /* Parse a BASEVER version string of the format "major.minor.patchlevel" | |
34 or "major.minor" to extract its components. */ | |
35 void | |
36 parse_basever (int *major, int *minor, int *patchlevel) | |
37 { | |
38 static int s_major = -1, s_minor, s_patchlevel; | |
39 | |
40 if (s_major == -1) | |
41 if (sscanf (BASEVER, "%d.%d.%d", &s_major, &s_minor, &s_patchlevel) != 3) | |
42 { | |
43 sscanf (BASEVER, "%d.%d", &s_major, &s_minor); | |
44 s_patchlevel = 0; | |
45 } | |
46 | |
47 if (major) | |
48 *major = s_major; | |
49 | |
50 if (minor) | |
51 *minor = s_minor; | |
52 | |
53 if (patchlevel) | |
54 *patchlevel = s_patchlevel; | |
55 } | |
56 | |
57 | |
58 /* Define __GNUC__, __GNUC_MINOR__, __GNUC_PATCHLEVEL__ and __VERSION__. */ | |
59 static void | |
60 define__GNUC__ (cpp_reader *pfile) | |
61 { | |
62 int major, minor, patchlevel; | |
63 | |
64 parse_basever (&major, &minor, &patchlevel); | |
65 cpp_define_formatted (pfile, "__GNUC__=%d", major); | |
66 cpp_define_formatted (pfile, "__GNUC_MINOR__=%d", minor); | |
67 cpp_define_formatted (pfile, "__GNUC_PATCHLEVEL__=%d", patchlevel); | |
68 cpp_define_formatted (pfile, "__VERSION__=\"%s\"", version_string); | |
69 } | |
70 | |
71 | |
72 /* Define various built-in CPP macros that depend on language-independent | |
73 compilation flags. */ | |
74 static void | |
75 define_builtin_macros_for_compilation_flags (cpp_reader *pfile) | |
76 { | |
77 if (flag_pic) | |
78 { | |
79 cpp_define_formatted (pfile, "__pic__=%d", flag_pic); | |
80 cpp_define_formatted (pfile, "__PIC__=%d", flag_pic); | |
81 } | |
82 if (flag_pie) | |
83 { | |
84 cpp_define_formatted (pfile, "__pie__=%d", flag_pie); | |
85 cpp_define_formatted (pfile, "__PIE__=%d", flag_pie); | |
86 } | |
87 | |
88 if (optimize_size) | |
89 cpp_define (pfile, "__OPTIMIZE_SIZE__"); | |
90 if (optimize) | |
91 cpp_define (pfile, "__OPTIMIZE__"); | |
92 | |
93 if (fast_math_flags_set_p (&global_options)) | |
94 cpp_define (pfile, "__FAST_MATH__"); | |
95 if (flag_signaling_nans) | |
96 cpp_define (pfile, "__SUPPORT_SNAN__"); | |
97 | |
98 cpp_define_formatted (pfile, "__FINITE_MATH_ONLY__=%d", | |
99 flag_finite_math_only); | |
100 } | |
101 | |
102 | |
103 /* Define built-in macros for LP64 targets. */ | |
104 static void | |
105 define_builtin_macros_for_lp64 (cpp_reader *pfile) | |
106 { | |
107 if (TYPE_PRECISION (long_integer_type_node) == 64 | |
108 && POINTER_SIZE == 64 | |
109 && TYPE_PRECISION (integer_type_node) == 32) | |
110 { | |
111 cpp_define (pfile, "_LP64"); | |
112 cpp_define (pfile, "__LP64__"); | |
113 } | |
114 } | |
115 | |
116 | |
117 /* Define macros for size of basic C types. */ | |
118 static void | |
119 define_builtin_macros_for_type_sizes (cpp_reader *pfile) | |
120 { | |
121 #define define_type_sizeof(NAME, TYPE) \ | |
122 cpp_define_formatted (pfile, NAME"="HOST_WIDE_INT_PRINT_DEC, \ | |
123 tree_low_cst (TYPE_SIZE_UNIT (TYPE), 1)) | |
124 | |
125 define_type_sizeof ("__SIZEOF_INT__", integer_type_node); | |
126 define_type_sizeof ("__SIZEOF_LONG__", long_integer_type_node); | |
127 define_type_sizeof ("__SIZEOF_LONG_LONG__", long_long_integer_type_node); | |
128 define_type_sizeof ("__SIZEOF_SHORT__", short_integer_type_node); | |
129 define_type_sizeof ("__SIZEOF_FLOAT__", float_type_node); | |
130 define_type_sizeof ("__SIZEOF_DOUBLE__", double_type_node); | |
131 define_type_sizeof ("__SIZEOF_LONG_DOUBLE__", long_double_type_node); | |
132 define_type_sizeof ("__SIZEOF_SIZE_T__", size_type_node); | |
133 | |
134 #undef define_type_sizeof | |
135 | |
136 cpp_define_formatted (pfile, "__CHAR_BIT__=%u", | |
137 TYPE_PRECISION (char_type_node)); | |
138 cpp_define_formatted (pfile, "__BIGGEST_ALIGNMENT__=%d", | |
139 BIGGEST_ALIGNMENT / BITS_PER_UNIT); | |
140 | |
141 /* Define constants useful for implementing endian.h. */ | |
142 cpp_define (pfile, "__ORDER_LITTLE_ENDIAN__=1234"); | |
143 cpp_define (pfile, "__ORDER_BIG_ENDIAN__=4321"); | |
144 cpp_define (pfile, "__ORDER_PDP_ENDIAN__=3412"); | |
145 | |
146 if (WORDS_BIG_ENDIAN == BYTES_BIG_ENDIAN) | |
147 cpp_define_formatted (pfile, "__BYTE_ORDER__=%s", | |
148 (WORDS_BIG_ENDIAN | |
149 ? "__ORDER_BIG_ENDIAN__" | |
150 : "__ORDER_LITTLE_ENDIAN__")); | |
151 else | |
152 { | |
153 /* Assert that we're only dealing with the PDP11 case. */ | |
154 gcc_assert (!BYTES_BIG_ENDIAN); | |
155 gcc_assert (WORDS_BIG_ENDIAN); | |
156 | |
157 cpp_define (pfile, "__BYTE_ORDER__=__ORDER_PDP_ENDIAN__"); | |
158 } | |
159 | |
160 cpp_define_formatted (pfile, "__FLOAT_WORD_ORDER__=%s", | |
161 (targetm.float_words_big_endian () | |
162 ? "__ORDER_BIG_ENDIAN__" | |
163 : "__ORDER_LITTLE_ENDIAN__")); | |
164 | |
165 /* ptr_type_node can't be used here since ptr_mode is only set when | |
166 toplev calls backend_init which is not done with -E switch. */ | |
167 cpp_define_formatted (pfile, "__SIZEOF_POINTER__=%d", | |
168 POINTER_SIZE / BITS_PER_UNIT); | |
169 } | |
170 | |
171 | |
172 /* Define macros builtins common to all language performing CPP | |
173 preprocessing. */ | |
174 void | |
175 define_language_independent_builtin_macros (cpp_reader *pfile) | |
176 { | |
177 define__GNUC__ (pfile); | |
178 define_builtin_macros_for_compilation_flags (pfile); | |
179 define_builtin_macros_for_lp64 (pfile); | |
180 define_builtin_macros_for_type_sizes (pfile); | |
181 } |