1 /* Subroutines for the gcc driver. 2 Copyright (C) 2008 Free Software Foundation, Inc. 3 4 This file is part of GCC. 5 6 GCC is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by 8 the Free Software Foundation; either version 3, or (at your option) 9 any later version. 10 11 GCC is distributed in the hope that it will be useful, 12 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 GNU General Public License for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with GCC; see the file COPYING3. If not see 18 <http://www.gnu.org/licenses/>. */ 19 20 #include "config.h" 21 #include "system.h" 22 #include "coretypes.h" 23 #include "tm.h" 24 25 /* This will be called by the spec parser in gcc.c when it sees 26 a %:local_cpu_detect(args) construct. Currently it will be called 27 with either "arch" or "tune" as argument depending on if -march=native 28 or -mtune=native is to be substituted. 29 30 It returns a string containing new command line parameters to be 31 put at the place of the above two options, depending on what CPU 32 this is executed. E.g. "-march=loongson2f" on a Loongson 2F for 33 -march=native. If the routine can't detect a known processor, 34 the -march or -mtune option is discarded. 35 36 ARGC and ARGV are set depending on the actual arguments given 37 in the spec. */ 38 const char * 39 host_detect_local_cpu (int argc, const char **argv) 40 { 41 const char *cpu = NULL; 42 char buf[128]; 43 FILE *f; 44 bool arch; 45 46 if (argc < 1) 47 return NULL; 48 49 arch = strcmp (argv[0], "arch") == 0; 50 if (!arch && strcmp (argv[0], "tune")) 51 return NULL; 52 53 f = fopen ("/proc/cpuinfo", "r"); 54 if (f == NULL) 55 return NULL; 56 57 while (fgets (buf, sizeof (buf), f) != NULL) 58 if (strncmp (buf, "cpu model", sizeof ("cpu model") - 1) == 0) 59 { 60 if (strstr (buf, "Godson2 V0.2") != NULL 61 || strstr (buf, "Loongson-2 V0.2") != NULL) 62 cpu = "loongson2e"; 63 else if (strstr (buf, "Godson2 V0.3") != NULL 64 || strstr (buf, "Loongson-2 V0.3") != NULL) 65 cpu = "loongson2f"; 66 else if (strstr (buf, "SiByte SB1") != NULL) 67 cpu = "sb1"; 68 else if (strstr (buf, "R5000") != NULL) 69 cpu = "r5000"; 70 else if (strstr (buf, "Octeon") != NULL) 71 cpu = "octeon"; 72 break; 73 } 74 75 fclose (f); 76 77 if (cpu == NULL) 78 return NULL; 79 80 return concat ("-m", argv[0], "=", cpu, NULL); 81 } 82