| /* Subroutines for the gcc driver. |
| Copyright (C) 2011-2022 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/>. */ |
| |
| #define IN_TARGET_CODE 1 |
| |
| #include "config.h" |
| #include "system.h" |
| #include "coretypes.h" |
| #include "tm.h" |
| #include "configargs.h" |
| |
| struct vendor_cpu |
| { |
| const char *part_no; |
| const char *arch_name; |
| const char *cpu_name; |
| }; |
| |
| struct vendor |
| { |
| const char *vendor_no; |
| const struct vendor_cpu *vendor_parts; |
| }; |
| |
| #include "arm-native.h" |
| |
| /* This will be called by the spec parser in gcc.cc when it sees |
| a %:local_cpu_detect(args) construct. Currently it will be called |
| with either "arch", "cpu" or "tune" as argument depending on if |
| -march=native, -mcpu=native or -mtune=native is to be substituted. |
| |
| It returns a string containing new command line parameters to be |
| put at the place of the above two options, depending on what CPU |
| this is executed. E.g. "-march=armv7-a" on a Cortex-A8 for |
| -march=native. If the routine can't detect a known processor, |
| the -march or -mtune option is discarded. |
| |
| ARGC and ARGV are set depending on the actual arguments given |
| in the spec. */ |
| const char * |
| host_detect_local_cpu (int argc, const char **argv) |
| { |
| const char *val = NULL; |
| char buf[128]; |
| FILE *f = NULL; |
| bool arch; |
| const struct vendor_cpu *cpu_table = NULL; |
| char *fcpu_info = NULL; |
| |
| if (argc < 1) |
| goto not_found; |
| |
| arch = strcmp (argv[0], "arch") == 0; |
| if (!arch && strcmp (argv[0], "cpu") != 0 && strcmp (argv[0], "tune")) |
| goto not_found; |
| |
| fcpu_info = getenv ("GCC_CPUINFO"); |
| if (fcpu_info) |
| f = fopen (fcpu_info, "r"); |
| else |
| f = fopen ("/proc/cpuinfo", "r"); |
| |
| if (f == NULL) |
| goto not_found; |
| |
| while (fgets (buf, sizeof (buf), f) != NULL) |
| { |
| /* Find the vendor table associated with this implementer. */ |
| if (startswith (buf, "CPU implementer")) |
| { |
| int i; |
| for (i = 0; vendors_table[i].vendor_no != NULL; i++) |
| if (strstr (buf, vendors_table[i].vendor_no) != NULL) |
| { |
| cpu_table = vendors_table[i].vendor_parts; |
| break; |
| } |
| } |
| |
| /* Detect arch/cpu. */ |
| if (startswith (buf, "CPU part")) |
| { |
| int i; |
| |
| if (cpu_table == NULL) |
| goto not_found; |
| |
| for (i = 0; cpu_table[i].part_no != NULL; i++) |
| if (strstr (buf, cpu_table[i].part_no) != NULL) |
| { |
| val = arch ? cpu_table[i].arch_name : cpu_table[i].cpu_name; |
| break; |
| } |
| break; |
| } |
| } |
| |
| if (val) |
| { |
| fclose (f); |
| return concat ("-m", argv[0], "=", val, NULL); |
| } |
| |
| not_found: |
| { |
| unsigned int i; |
| unsigned int opt; |
| const char *search[] = {NULL, "arch"}; |
| |
| if (f) |
| fclose (f); |
| |
| search[0] = argv[0]; |
| for (opt = 0; opt < ARRAY_SIZE (search); opt++) |
| for (i = 0; i < ARRAY_SIZE (configure_default_options); i++) |
| if (strcmp (configure_default_options[i].name, search[opt]) == 0) |
| return concat ("-m", search[opt], "=", |
| configure_default_options[i].value, NULL); |
| return NULL; |
| } |
| } |