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/* Common hooks for AArch64.
Copyright (C) 2012-2014 Free Software Foundation, Inc.
Contributed by ARM Ltd.
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 "common/common-target.h"
#include "common/common-target-def.h"
#include "opts.h"
#include "flags.h"
#ifdef TARGET_BIG_ENDIAN_DEFAULT
#undef TARGET_DEFAULT_TARGET_FLAGS
#define TARGET_DEFAULT_TARGET_FLAGS (MASK_BIG_END)
#endif
#undef TARGET_HANDLE_OPTION
#define TARGET_HANDLE_OPTION aarch64_handle_option
#undef TARGET_OPTION_OPTIMIZATION_TABLE
#define TARGET_OPTION_OPTIMIZATION_TABLE aarch_option_optimization_table
/* Set default optimization options. */
static const struct default_options aarch_option_optimization_table[] =
{
/* Enable section anchors by default at -O1 or higher. */
{ OPT_LEVELS_1_PLUS, OPT_fsection_anchors, NULL, 1 },
/* Enable redundant extension instructions removal at -O2 and higher. */
{ OPT_LEVELS_2_PLUS, OPT_free, NULL, 1 },
{ OPT_LEVELS_NONE, 0, NULL, 0 }
};
/* Implement TARGET_HANDLE_OPTION.
This function handles the target specific options for CPU/target selection.
march wins over mcpu, so when march is defined, mcpu takes the same value,
otherwise march remains undefined. mtune can be used with either march or
mcpu. If march and mcpu are used together, the rightmost option wins.
mtune can be used with either march or mcpu. */
static bool
aarch64_handle_option (struct gcc_options *opts,
struct gcc_options *opts_set ATTRIBUTE_UNUSED,
const struct cl_decoded_option *decoded,
location_t loc ATTRIBUTE_UNUSED)
{
size_t code = decoded->opt_index;
const char *arg = decoded->arg;
switch (code)
{
case OPT_march_:
opts->x_aarch64_arch_string = arg;
opts->x_aarch64_cpu_string = arg;
return true;
case OPT_mcpu_:
opts->x_aarch64_cpu_string = arg;
opts->x_aarch64_arch_string = NULL;
return true;
case OPT_mtune_:
opts->x_aarch64_tune_string = arg;
return true;
default:
return true;
}
}
struct gcc_targetm_common targetm_common = TARGETM_COMMON_INITIALIZER;
#define AARCH64_CPU_NAME_LENGTH 20
/* Truncate NAME at the first '.' character seen, or return
NAME unmodified. */
const char *
aarch64_rewrite_selected_cpu (const char *name)
{
static char output_buf[AARCH64_CPU_NAME_LENGTH + 1] = {0};
char *arg_pos;
strncpy (output_buf, name, AARCH64_CPU_NAME_LENGTH);
arg_pos = strchr (output_buf, '.');
/* If we found a '.' truncate the entry at that point. */
if (arg_pos)
*arg_pos = '\0';
return output_buf;
}
/* Called by the driver to rewrite a name passed to the -mcpu
argument in preparation to be passed to the assembler. The
name will be in ARGV[0], ARGC should always be 1. */
const char *
aarch64_rewrite_mcpu (int argc, const char **argv)
{
gcc_assert (argc == 1);
return aarch64_rewrite_selected_cpu (argv[0]);
}
#undef AARCH64_CPU_NAME_LENGTH
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