| /* 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. |
| |
| -mcpu=CPU is shorthand for -march=ARCH_FOR_CPU, -mtune=CPU. |
| If either of -march or -mtune is given, they override their |
| respective component of -mcpu. This logic is implemented |
| in config/aarch64/aarch64.c:aarch64_override_options. */ |
| |
| 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; |
| return true; |
| |
| case OPT_mcpu_: |
| opts->x_aarch64_cpu_string = arg; |
| 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 |
| names passed from the commend line will be in ARGV, we want |
| to use the right-most argument, which should be in |
| ARGV[ARGC - 1]. ARGC should always be greater than 0. */ |
| |
| const char * |
| aarch64_rewrite_mcpu (int argc, const char **argv) |
| { |
| gcc_assert (argc); |
| return aarch64_rewrite_selected_cpu (argv[argc - 1]); |
| } |
| |
| #undef AARCH64_CPU_NAME_LENGTH |
| |