| /* Subroutines for the gcc driver. |
| Copyright (C) 2008-2022 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" |
| |
| /* 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" or "tune" as argument depending on if -march=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=loongson2f" on a Loongson 2F 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 *cpu = NULL; |
| char buf[128]; |
| FILE *f; |
| bool arch; |
| |
| if (argc < 1) |
| return NULL; |
| |
| arch = strcmp (argv[0], "arch") == 0; |
| if (!arch && strcmp (argv[0], "tune")) |
| return NULL; |
| |
| f = fopen ("/proc/cpuinfo", "r"); |
| if (f == NULL) |
| return NULL; |
| |
| while (fgets (buf, sizeof (buf), f) != NULL) |
| if (startswith (buf, "cpu model")) |
| { |
| if (strstr (buf, "Godson2 V0.2") != NULL |
| || strstr (buf, "Loongson-2 V0.2") != NULL |
| || strstr (buf, "Loongson-2E") != NULL) |
| cpu = "loongson2e"; |
| else if (strstr (buf, "Godson2 V0.3") != NULL |
| || strstr (buf, "Loongson-2 V0.3") != NULL |
| || strstr (buf, "Loongson-2F") != NULL) |
| cpu = "loongson2f"; |
| else if (strstr (buf, "Godson3 V0.5") != NULL |
| || strstr (buf, "Loongson-3 V0.5") != NULL |
| || strstr (buf, "Loongson-3A") != NULL) |
| cpu = "loongson3a"; |
| else if (strstr (buf, "SiByte SB1") != NULL) |
| cpu = "sb1"; |
| else if (strstr (buf, "R5000") != NULL) |
| cpu = "r5000"; |
| else if (strstr (buf, "Octeon II") != NULL) |
| cpu = "octeon2"; |
| else if (strstr (buf, "Octeon") != NULL) |
| cpu = "octeon"; |
| break; |
| } |
| |
| fclose (f); |
| |
| if (cpu == NULL) |
| return NULL; |
| |
| return concat ("-m", argv[0], "=", cpu, NULL); |
| } |