/* Common hooks for AArch64. Copyright (C) 2012-2015 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 . */ #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" #include "errors.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 -fsched-pressure by default when optimizing. */ { OPT_LEVELS_1_PLUS, OPT_fsched_pressure, 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 128 /* Truncate NAME at the first '.' character seen up to the first '+' or return NAME unmodified. */ const char * aarch64_rewrite_selected_cpu (const char *name) { static char output_buf[AARCH64_CPU_NAME_LENGTH + 1] = {0}; const char *bL_sep; const char *feats; size_t pref_size; size_t feat_size; bL_sep = strchr (name, '.'); if (!bL_sep) return name; feats = strchr (name, '+'); feat_size = feats ? strnlen (feats, AARCH64_CPU_NAME_LENGTH) : 0; pref_size = bL_sep - name; if ((feat_size + pref_size) > AARCH64_CPU_NAME_LENGTH) internal_error ("-mcpu string too large"); strncpy (output_buf, name, pref_size); if (feats) strncpy (output_buf + pref_size, feats, feat_size); 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