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/* Subroutines for the gcc driver.
Copyright (C) 2008 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"
/* 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" 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 (strncmp (buf, "cpu model", sizeof ("cpu model") - 1) == 0)
{
if (strstr (buf, "Godson2 V0.2") != NULL
|| strstr (buf, "Loongson-2 V0.2") != NULL)
cpu = "loongson2e";
else if (strstr (buf, "Godson2 V0.3") != NULL
|| strstr (buf, "Loongson-2 V0.3") != NULL)
cpu = "loongson2f";
else if (strstr (buf, "SiByte SB1") != NULL)
cpu = "sb1";
else if (strstr (buf, "R5000") != NULL)
cpu = "r5000";
else if (strstr (buf, "Octeon") != NULL)
cpu = "octeon";
break;
}
fclose (f);
if (cpu == NULL)
return NULL;
return concat ("-m", argv[0], "=", cpu, NULL);
}
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