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[/] [openrisc/] [trunk/] [gnu-src/] [gcc-4.5.1/] [gcc/] [config/] [alpha/] [driver-alpha.c] - Blame information for rev 282

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1 282 jeremybenn
/* Subroutines for the gcc driver.
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   Copyright (C) 2009 Free Software Foundation, Inc.
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   Contributed by Arthur Loiret <aloiret@debian.org>
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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GCC is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING3.  If not see
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<http://www.gnu.org/licenses/>.  */
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#include "config.h"
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#include "system.h"
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#include "coretypes.h"
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#include "tm.h"
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/* This will be called by the spec parser in gcc.c when it sees
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   a %:local_cpu_detect(args) construct.  Currently it will be called
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   with either "cpu" or "tune" as argument depending on if -mcpu=native
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   or -mtune=native is to be substituted.
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   It returns a string containing new command line parameters to be
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   put at the place of the above two options, depending on what CPU
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   this is executed.  E.g. "-mcpu=ev6" on an Alpha 21264 for
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   -mcpu=native.  If the routine can't detect a known processor,
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   the -mcpu or -mtune option is discarded.
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   ARGC and ARGV are set depending on the actual arguments given
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   in the spec.  */
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const char *
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host_detect_local_cpu (int argc, const char **argv)
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{
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  const char *cpu = NULL;
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  char buf[128];
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  FILE *f;
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  static const struct cpu_names {
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   const char *const name;
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   const char *const cpu;
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  } cpu_names[] = {
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    { "EV79",   "ev67" },
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    { "EV7",    "ev67" },
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    { "EV69",   "ev67" },
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    { "EV68CX", "ev67" },
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    { "EV68CB", "ev67" },
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    { "EV68AL", "ev67" },
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    { "EV67",   "ev67" },
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    { "EV6",    "ev6" },
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    { "PCA57",  "pca56" },
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    { "PCA56",  "pca56" },
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    { "EV56",   "ev56" },
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    { "EV5",    "ev5" },
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    { "LCA45",  "ev45" },
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    { "EV45",   "ev45" },
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    { "LCA4",   "ev4" },
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    { "EV4",    "ev4" },
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/*  { "EV3",    "ev3" },  */
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    { 0, 0 }
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  };
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  int i;
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  if (argc < 1)
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    return NULL;
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  if (strcmp (argv[0], "cpu") && strcmp (argv[0], "tune"))
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    return NULL;
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  f = fopen ("/proc/cpuinfo", "r");
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  if (f == NULL)
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    return NULL;
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  while (fgets (buf, sizeof (buf), f) != NULL)
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    if (strncmp (buf, "cpu model", sizeof ("cpu model") - 1) == 0)
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      {
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        for (i = 0; cpu_names [i].name; i++)
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          if (strstr (buf, cpu_names [i].name) != NULL)
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            {
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              cpu = cpu_names [i].cpu;
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              break;
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            }
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        break;
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      }
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  fclose (f);
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  if (cpu == NULL)
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    return NULL;
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  return concat ("-m", argv[0], "=", cpu, NULL);
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}

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