1 /* Copyright (C) 2007-2016 Free Software Foundation, Inc.
3 This file is part of GCC.
5 GCC is free software; you can redistribute it and/or modify it under
6 the terms of the GNU General Public License as published by the Free
7 Software Foundation; either version 3, or (at your option) any later
10 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
11 WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
15 You should have received a copy of the GNU General Public License
16 along with GCC; see the file COPYING3. If not see
17 <http://www.gnu.org/licenses/>. */
21 #include "coretypes.h"
23 #include "c-family/c-common.h"
25 #include "c-family/c-pragma.h"
26 #include "stringpool.h"
28 /* Output C specific EABI object attributes. These can not be done in
29 arm.c because they require information from the C frontend. */
32 arm_output_c_attributes (void)
34 int wchar_size
= (int)(TYPE_PRECISION (wchar_type_node
) / BITS_PER_UNIT
);
35 arm_emit_eabi_attribute ("Tag_ABI_PCS_wchar_t", 18, wchar_size
);
39 /* Setup so that common code calls arm_output_c_attributes. */
42 arm_lang_object_attributes_init (void)
44 arm_lang_output_object_attributes_hook
= arm_output_c_attributes
;
47 #define builtin_define(TXT) cpp_define (pfile, TXT)
48 #define builtin_assert(TXT) cpp_assert (pfile, TXT)
50 /* Define or undefine macros based on the current target. If the user does
51 #pragma GCC target, we need to adjust the macros dynamically. */
54 def_or_undef_macro(struct cpp_reader
* pfile
, const char *name
, bool def_p
)
57 cpp_define (pfile
, name
);
59 cpp_undef (pfile
, name
);
63 arm_cpu_builtins (struct cpp_reader
* pfile
)
65 def_or_undef_macro (pfile
, "__ARM_FEATURE_DSP", TARGET_DSP_MULTIPLY
);
66 def_or_undef_macro (pfile
, "__ARM_FEATURE_QBIT", TARGET_ARM_QBIT
);
67 def_or_undef_macro (pfile
, "__ARM_FEATURE_SAT", TARGET_ARM_SAT
);
68 def_or_undef_macro (pfile
, "__ARM_FEATURE_CRYPTO", TARGET_CRYPTO
);
70 def_or_undef_macro (pfile
, "__ARM_FEATURE_UNALIGNED", unaligned_access
);
72 def_or_undef_macro (pfile
, "__ARM_FEATURE_QRDMX", TARGET_NEON_RDMA
);
75 builtin_define ("__ARM_FEATURE_CRC32");
77 def_or_undef_macro (pfile
, "__ARM_32BIT_STATE", TARGET_32BIT
);
79 if (TARGET_ARM_FEATURE_LDREX
)
80 builtin_define_with_int_value ("__ARM_FEATURE_LDREX",
81 TARGET_ARM_FEATURE_LDREX
);
83 cpp_undef (pfile
, "__ARM_FEATURE_LDREX");
85 def_or_undef_macro (pfile
, "__ARM_FEATURE_CLZ",
86 ((TARGET_ARM_ARCH
>= 5 && !TARGET_THUMB
)
87 || TARGET_ARM_ARCH_ISA_THUMB
>=2));
89 def_or_undef_macro (pfile
, "__ARM_FEATURE_SIMD32", TARGET_INT_SIMD
);
91 builtin_define_with_int_value ("__ARM_SIZEOF_MINIMAL_ENUM",
92 flag_short_enums
? 1 : 4);
93 builtin_define_type_sizeof ("__ARM_SIZEOF_WCHAR_T", wchar_type_node
);
94 if (TARGET_ARM_ARCH_PROFILE
)
95 builtin_define_with_int_value ("__ARM_ARCH_PROFILE",
96 TARGET_ARM_ARCH_PROFILE
);
98 /* Define __arm__ even when in thumb mode, for
99 consistency with armcc. */
100 builtin_define ("__arm__");
102 builtin_define_with_int_value ("__ARM_ARCH", TARGET_ARM_ARCH
);
104 builtin_define ("__ARM_ARCH_ISA_ARM");
105 builtin_define ("__APCS_32__");
107 def_or_undef_macro (pfile
, "__thumb__", TARGET_THUMB
);
108 def_or_undef_macro (pfile
, "__thumb2__", TARGET_THUMB2
);
110 def_or_undef_macro (pfile
, "__THUMBEB__", TARGET_THUMB
);
112 def_or_undef_macro (pfile
, "__THUMBEL__", TARGET_THUMB
);
114 if (TARGET_ARM_ARCH_ISA_THUMB
)
115 builtin_define_with_int_value ("__ARM_ARCH_ISA_THUMB",
116 TARGET_ARM_ARCH_ISA_THUMB
);
120 builtin_define ("__ARMEB__");
121 builtin_define ("__ARM_BIG_ENDIAN");
125 builtin_define ("__ARMEL__");
128 if (TARGET_SOFT_FLOAT
)
129 builtin_define ("__SOFTFP__");
131 def_or_undef_macro (pfile
, "__VFP_FP__", TARGET_VFP
);
134 builtin_define_with_int_value ("__ARM_FP", TARGET_ARM_FP
);
136 cpp_undef (pfile
, "__ARM_FP");
138 if (arm_fp16_format
== ARM_FP16_FORMAT_IEEE
)
139 builtin_define ("__ARM_FP16_FORMAT_IEEE");
140 if (arm_fp16_format
== ARM_FP16_FORMAT_ALTERNATIVE
)
141 builtin_define ("__ARM_FP16_FORMAT_ALTERNATIVE");
143 def_or_undef_macro (pfile
, "__ARM_FEATURE_FMA", TARGET_FMA
);
144 def_or_undef_macro (pfile
, "__ARM_NEON__", TARGET_NEON
);
145 def_or_undef_macro (pfile
, "__ARM_NEON", TARGET_NEON
);
148 builtin_define_with_int_value ("__ARM_NEON_FP", TARGET_NEON_FP
);
150 cpp_undef (pfile
, "__ARM_NEON_FP");
152 /* Add a define for interworking. Needed when building libgcc.a. */
153 if (arm_cpp_interwork
)
154 builtin_define ("__THUMB_INTERWORK__");
156 builtin_define (arm_arch_name
);
158 builtin_define ("__XSCALE__");
161 builtin_define ("__IWMMXT__");
162 builtin_define ("__ARM_WMMX");
164 if (arm_arch_iwmmxt2
)
165 builtin_define ("__IWMMXT2__");
166 /* ARMv6KZ was originally identified as the misspelled __ARM_ARCH_6ZK__. To
167 preserve the existing behaviour, the misspelled feature macro must still be
170 builtin_define ("__ARM_ARCH_6ZK__");
171 if (TARGET_AAPCS_BASED
)
173 if (arm_pcs_default
== ARM_PCS_AAPCS_VFP
)
174 builtin_define ("__ARM_PCS_VFP");
175 else if (arm_pcs_default
== ARM_PCS_AAPCS
)
176 builtin_define ("__ARM_PCS");
177 builtin_define ("__ARM_EABI__");
180 def_or_undef_macro (pfile
, "__ARM_ARCH_EXT_IDIV__", TARGET_IDIV
);
181 def_or_undef_macro (pfile
, "__ARM_FEATURE_IDIV", TARGET_IDIV
);
183 def_or_undef_macro (pfile
, "__ARM_ASM_SYNTAX_UNIFIED__", inline_asm_unified
);
187 arm_cpu_cpp_builtins (struct cpp_reader
* pfile
)
189 builtin_assert ("cpu=arm");
190 builtin_assert ("machine=arm");
192 arm_cpu_builtins (pfile
);
195 /* Hook to validate the current #pragma GCC target and set the arch custom
196 mode state. If ARGS is NULL, then POP_TARGET is used to reset
199 arm_pragma_target_parse (tree args
, tree pop_target
)
201 tree prev_tree
= build_target_option_node (&global_options
);
203 struct cl_target_option
*prev_opt
;
204 struct cl_target_option
*cur_opt
;
208 cur_tree
= ((pop_target
) ? pop_target
: target_option_default_node
);
209 cl_target_option_restore (&global_options
,
210 TREE_TARGET_OPTION (cur_tree
));
214 cur_tree
= arm_valid_target_attribute_tree (args
, &global_options
,
215 &global_options_set
);
216 if (cur_tree
== NULL_TREE
)
218 cl_target_option_restore (&global_options
,
219 TREE_TARGET_OPTION (prev_tree
));
224 target_option_current_node
= cur_tree
;
225 arm_reset_previous_fndecl ();
227 /* Figure out the previous mode. */
228 prev_opt
= TREE_TARGET_OPTION (prev_tree
);
229 cur_opt
= TREE_TARGET_OPTION (cur_tree
);
231 gcc_assert (prev_opt
);
232 gcc_assert (cur_opt
);
234 if (cur_opt
!= prev_opt
)
236 /* For the definitions, ensure all newly defined macros are considered
237 as used for -Wunused-macros. There is no point warning about the
238 compiler predefined macros. */
239 cpp_options
*cpp_opts
= cpp_get_options (parse_in
);
240 unsigned char saved_warn_unused_macros
= cpp_opts
->warn_unused_macros
;
241 unsigned char saved_warn_builtin_macro_redefined
242 = cpp_opts
->warn_builtin_macro_redefined
;
244 cpp_opts
->warn_unused_macros
= 0;
245 cpp_opts
->warn_builtin_macro_redefined
= 0;
248 gcc_assert (cur_opt
->x_target_flags
== target_flags
);
250 /* Don't warn for macros that have context sensitive values depending on
252 See warn_of_redefinition, Reset after cpp_create_definition. */
253 tree acond_macro
= get_identifier ("__ARM_NEON_FP");
254 C_CPP_HASHNODE (acond_macro
)->flags
|= NODE_CONDITIONAL
;
256 acond_macro
= get_identifier ("__ARM_FP");
257 C_CPP_HASHNODE (acond_macro
)->flags
|= NODE_CONDITIONAL
;
259 acond_macro
= get_identifier ("__ARM_FEATURE_LDREX");
260 C_CPP_HASHNODE (acond_macro
)->flags
|= NODE_CONDITIONAL
;
262 arm_cpu_builtins (parse_in
);
264 cpp_opts
->warn_builtin_macro_redefined
= saved_warn_builtin_macro_redefined
;
265 cpp_opts
->warn_unused_macros
= saved_warn_unused_macros
;
271 /* Register target pragmas. We need to add the hook for parsing #pragma GCC
272 option here rather than in arm.c since it will pull in various preprocessor
273 functions, and those are not present in languages like fortran without a
277 arm_register_target_pragmas (void)
279 /* Update pragma hook to allow parsing #pragma GCC target. */
280 targetm
.target_option
.pragma_parse
= arm_pragma_target_parse
;
282 #ifdef REGISTER_SUBTARGET_PRAGMAS
283 REGISTER_SUBTARGET_PRAGMAS ();