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/* Copyright (C) 2007-2015 Free Software Foundation, Inc.
This file is part of GCC.
GCC 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 3, or (at your option) any later
version.
GCC 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 GCC; see the file COPYING3. If not see
<http://www.gnu.org/licenses/>. */
#include "config.h"
#include "system.h"
#include "coretypes.h"
#include "tm.h"
#include "tm_p.h"
#include "alias.h"
#include "symtab.h"
#include "tree.h"
#include "tm_p.h"
#include "c-family/c-common.h"
#include "target.h"
#include "target-def.h"
#include "c-family/c-pragma.h"
/* Output C specific EABI object attributes. These can not be done in
arm.c because they require information from the C frontend. */
static void
arm_output_c_attributes (void)
{
int wchar_size = (int)(TYPE_PRECISION (wchar_type_node) / BITS_PER_UNIT);
arm_emit_eabi_attribute ("Tag_ABI_PCS_wchar_t", 18, wchar_size);
}
/* Setup so that common code calls arm_output_c_attributes. */
void
arm_lang_object_attributes_init (void)
{
arm_lang_output_object_attributes_hook = arm_output_c_attributes;
}
#define builtin_define(TXT) cpp_define (pfile, TXT)
#define builtin_assert(TXT) cpp_assert (pfile, TXT)
/* Define or undefine macros based on the current target. If the user does
#pragma GCC target, we need to adjust the macros dynamically. */
static void
def_or_undef_macro(struct cpp_reader* pfile, const char *name, bool def_p)
{
if (def_p)
cpp_define (pfile, name);
else
cpp_undef (pfile, name);
}
void
arm_cpu_builtins (struct cpp_reader* pfile, int flags)
{
def_or_undef_macro (pfile, "__ARM_FEATURE_DSP",
TARGET_DSP_MULTIPLY_P (flags));
def_or_undef_macro (pfile, "__ARM_FEATURE_QBIT",
TARGET_ARM_QBIT_P (flags));
def_or_undef_macro (pfile, "__ARM_FEATURE_SAT",
TARGET_ARM_SAT_P (flags));
if (TARGET_CRYPTO)
builtin_define ("__ARM_FEATURE_CRYPTO");
if (unaligned_access)
builtin_define ("__ARM_FEATURE_UNALIGNED");
if (TARGET_CRC32)
builtin_define ("__ARM_FEATURE_CRC32");
def_or_undef_macro (pfile, "__ARM_32BIT_STATE", TARGET_32BIT_P (flags));
if (TARGET_ARM_FEATURE_LDREX_P (flags))
builtin_define_with_int_value ("__ARM_FEATURE_LDREX",
TARGET_ARM_FEATURE_LDREX_P (flags));
else
cpp_undef (pfile, "__ARM_FEATURE_LDREX");
def_or_undef_macro (pfile, "__ARM_FEATURE_CLZ",
((TARGET_ARM_ARCH >= 5 && !TARGET_THUMB_P (flags))
|| TARGET_ARM_ARCH_ISA_THUMB >=2));
def_or_undef_macro (pfile, "__ARM_FEATURE_SIMD32", TARGET_INT_SIMD_P (flags));
builtin_define_with_int_value ("__ARM_SIZEOF_MINIMAL_ENUM",
flag_short_enums ? 1 : 4);
builtin_define_type_sizeof ("__ARM_SIZEOF_WCHAR_T", wchar_type_node);
if (TARGET_ARM_ARCH_PROFILE)
builtin_define_with_int_value ("__ARM_ARCH_PROFILE",
TARGET_ARM_ARCH_PROFILE);
/* Define __arm__ even when in thumb mode, for
consistency with armcc. */
builtin_define ("__arm__");
if (TARGET_ARM_ARCH)
builtin_define_with_int_value ("__ARM_ARCH", TARGET_ARM_ARCH);
if (arm_arch_notm)
builtin_define ("__ARM_ARCH_ISA_ARM");
builtin_define ("__APCS_32__");
def_or_undef_macro (pfile, "__thumb__", TARGET_THUMB_P (flags));
def_or_undef_macro (pfile, "__thumb2__", TARGET_THUMB2_P (flags));
if (TARGET_BIG_END)
def_or_undef_macro (pfile, "__THUMBEB__", TARGET_THUMB_P (flags));
else
def_or_undef_macro (pfile, "__THUMBEL__", TARGET_THUMB_P (flags));
if (TARGET_ARM_ARCH_ISA_THUMB)
builtin_define_with_int_value ("__ARM_ARCH_ISA_THUMB",
TARGET_ARM_ARCH_ISA_THUMB);
if (TARGET_BIG_END)
{
builtin_define ("__ARMEB__");
builtin_define ("__ARM_BIG_ENDIAN");
}
else
{
builtin_define ("__ARMEL__");
}
if (TARGET_SOFT_FLOAT)
builtin_define ("__SOFTFP__");
if (TARGET_VFP)
builtin_define ("__VFP_FP__");
if (TARGET_ARM_FP)
builtin_define_with_int_value ("__ARM_FP", TARGET_ARM_FP);
if (arm_fp16_format == ARM_FP16_FORMAT_IEEE)
builtin_define ("__ARM_FP16_FORMAT_IEEE");
if (arm_fp16_format == ARM_FP16_FORMAT_ALTERNATIVE)
builtin_define ("__ARM_FP16_FORMAT_ALTERNATIVE");
if (TARGET_FMA)
builtin_define ("__ARM_FEATURE_FMA");
if (TARGET_NEON)
{
builtin_define ("__ARM_NEON__");
builtin_define ("__ARM_NEON");
}
if (TARGET_NEON_FP)
builtin_define_with_int_value ("__ARM_NEON_FP", TARGET_NEON_FP);
/* Add a define for interworking. Needed when building libgcc.a. */
if (arm_cpp_interwork)
builtin_define ("__THUMB_INTERWORK__");
builtin_define (arm_arch_name);
if (arm_arch_xscale)
builtin_define ("__XSCALE__");
if (arm_arch_iwmmxt)
{
builtin_define ("__IWMMXT__");
builtin_define ("__ARM_WMMX");
}
if (arm_arch_iwmmxt2)
builtin_define ("__IWMMXT2__");
if (TARGET_AAPCS_BASED)
{
if (arm_pcs_default == ARM_PCS_AAPCS_VFP)
builtin_define ("__ARM_PCS_VFP");
else if (arm_pcs_default == ARM_PCS_AAPCS)
builtin_define ("__ARM_PCS");
builtin_define ("__ARM_EABI__");
}
def_or_undef_macro (pfile, "__ARM_ARCH_EXT_IDIV__", TARGET_IDIV_P (flags));
def_or_undef_macro (pfile, "__ARM_FEATURE_IDIV", TARGET_IDIV_P (flags));
def_or_undef_macro (pfile, "__ARM_ASM_SYNTAX_UNIFIED__", inline_asm_unified);
}
void
arm_cpu_cpp_builtins (struct cpp_reader * pfile)
{
builtin_assert ("cpu=arm");
builtin_assert ("machine=arm");
arm_cpu_builtins (pfile, target_flags);
}
/* Hook to validate the current #pragma GCC target and set the arch custom
mode state. If ARGS is NULL, then POP_TARGET is used to reset
the options. */
static bool
arm_pragma_target_parse (tree args, tree pop_target)
{
tree prev_tree = build_target_option_node (&global_options);
tree cur_tree;
struct cl_target_option *prev_opt;
struct cl_target_option *cur_opt;
if (! args)
{
cur_tree = ((pop_target) ? pop_target : target_option_default_node);
cl_target_option_restore (&global_options,
TREE_TARGET_OPTION (cur_tree));
}
else
{
cur_tree = arm_valid_target_attribute_tree (args, &global_options,
&global_options_set);
if (cur_tree == NULL_TREE)
{
cl_target_option_restore (&global_options,
TREE_TARGET_OPTION (prev_tree));
return false;
}
}
target_option_current_node = cur_tree;
arm_reset_previous_fndecl ();
/* Figure out the previous mode. */
prev_opt = TREE_TARGET_OPTION (prev_tree);
cur_opt = TREE_TARGET_OPTION (cur_tree);
gcc_assert (prev_opt);
gcc_assert (cur_opt);
if (cur_opt->x_target_flags != prev_opt->x_target_flags)
{
/* For the definitions, ensure all newly defined macros are considered
as used for -Wunused-macros. There is no point warning about the
compiler predefined macros. */
cpp_options *cpp_opts = cpp_get_options (parse_in);
unsigned char saved_warn_unused_macros = cpp_opts->warn_unused_macros;
cpp_opts->warn_unused_macros = 0;
/* Update macros. */
arm_cpu_builtins (parse_in, cur_opt->x_target_flags);
cpp_opts->warn_unused_macros = saved_warn_unused_macros;
}
return true;
}
/* Register target pragmas. We need to add the hook for parsing #pragma GCC
option here rather than in arm.c since it will pull in various preprocessor
functions, and those are not present in languages like fortran without a
preprocessor. */
void
arm_register_target_pragmas (void)
{
/* Update pragma hook to allow parsing #pragma GCC target. */
targetm.target_option.pragma_parse = arm_pragma_target_parse;
#ifdef REGISTER_SUBTARGET_PRAGMAS
REGISTER_SUBTARGET_PRAGMAS ();
#endif
}
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