miscemu/cpu.c

   1 /*
   2  * What processor?
   3  *
   4  * Copyright 1995 Morten Welinder
   5  */
   6
   7 #include <stdio.h>
   8 #include <ctype.h>
   9 #include <string.h>
  10
  11 int runtime_cpu (void)
  12 {
  13   static int cache = 0;
  14
  15 #ifdef linux
  16   if (!cache)
  17     {
  18       FILE *f = fopen ("/proc/cpuinfo", "r");
  19
  20       cache = 3;  /* Default.  */
  21
  22       if (f)
  23         {
  24           char info[5], value[5];
  25           while (fscanf (f, " %4s%*s : %4s%*s", info, value) == 2)
  26             if (!strcasecmp (info, "cpu"))
  27               {
  28                 if (isdigit (value[0]) && value[1] == '8'
  29                     && value[2] == '6' && value[3] == 0)
  30                   {
  31                     cache = value[0] - '0';
  32                     break;
  33                   }
  34               }
  35           fclose (f);
  36         }
  37     }
  38   return cache;
  39 #else
  40   /* FIXME: how do we do this on other systems? */
  41   return 3;
  42 #endif
  43 }