diff options
Diffstat (limited to 'gcc-4.9/gcc/config/arm/driver-arm.c')
| -rw-r--r-- | gcc-4.9/gcc/config/arm/driver-arm.c | 151 |
1 files changed, 151 insertions, 0 deletions
diff --git a/gcc-4.9/gcc/config/arm/driver-arm.c b/gcc-4.9/gcc/config/arm/driver-arm.c new file mode 100644 index 000000000..6d9c4174c --- /dev/null +++ b/gcc-4.9/gcc/config/arm/driver-arm.c @@ -0,0 +1,151 @@ +/* Subroutines for the gcc driver. + Copyright (C) 2011-2014 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/>. */ + +#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; +}; + +static struct vendor_cpu arm_cpu_table[] = { + {"0x926", "armv5te", "arm926ej-s"}, + {"0xa26", "armv5te", "arm1026ej-s"}, + {"0xb02", "armv6k", "mpcore"}, + {"0xb36", "armv6j", "arm1136j-s"}, + {"0xb56", "armv6t2", "arm1156t2-s"}, + {"0xb76", "armv6zk", "arm1176jz-s"}, + {"0xc05", "armv7-a", "cortex-a5"}, + {"0xc07", "armv7ve", "cortex-a7"}, + {"0xc08", "armv7-a", "cortex-a8"}, + {"0xc09", "armv7-a", "cortex-a9"}, + {"0xc0d", "armv7ve", "cortex-a12"}, + {"0xc0f", "armv7ve", "cortex-a15"}, + {"0xc14", "armv7-r", "cortex-r4"}, + {"0xc15", "armv7-r", "cortex-r5"}, + {"0xc20", "armv6-m", "cortex-m0"}, + {"0xc21", "armv6-m", "cortex-m1"}, + {"0xc23", "armv7-m", "cortex-m3"}, + {"0xc24", "armv7e-m", "cortex-m4"}, + {NULL, NULL, NULL} +}; + +static struct { + const char *vendor_no; + const struct vendor_cpu *vendor_parts; +} vendors[] = { + {"0x41", arm_cpu_table}, + {NULL, NULL} +}; + +/* This will be called by the spec parser in gcc.c 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; + + 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; + + f = fopen ("/proc/cpuinfo", "r"); + if (f == NULL) + goto not_found; + + while (fgets (buf, sizeof (buf), f) != NULL) + { + /* Ensure that CPU implementer is ARM (0x41). */ + if (strncmp (buf, "CPU implementer", sizeof ("CPU implementer") - 1) == 0) + { + int i; + for (i = 0; vendors[i].vendor_no != NULL; i++) + if (strstr (buf, vendors[i].vendor_no) != NULL) + { + cpu_table = vendors[i].vendor_parts; + break; + } + } + + /* Detect arch/cpu. */ + if (strncmp (buf, "CPU part", sizeof ("CPU part") - 1) == 0) + { + 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; + } + } + + fclose (f); + + if (val == NULL) + goto not_found; + + 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; + } +} |