vpx_ports/x86_cpuid.c

   1 /*
   2  *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
   3  *
   4  *  Use of this source code is governed by a BSD-style license
   5  *  that can be found in the LICENSE file in the root of the source
   6  *  tree. An additional intellectual property rights grant can be found
   7  *  in the file PATENTS.  All contributing project authors may
   8  *  be found in the AUTHORS file in the root of the source tree.
   9  */
  10
  11 #include <string.h>
  12 #include "x86.h"
  13
  14 struct cpuid_vendors
  15 {
  16     char vendor_string[12];
  17     vpx_cpu_t vendor_id;
  18 };
  19
  20 static struct cpuid_vendors cpuid_vendor_list[VPX_CPU_LAST] =
  21 {
  22     { "AuthenticAMD", VPX_CPU_AMD           },
  23     { "AMDisbetter!", VPX_CPU_AMD_OLD       },
  24     { "CentaurHauls", VPX_CPU_CENTAUR       },
  25     { "CyrixInstead", VPX_CPU_CYRIX         },
  26     { "GenuineIntel", VPX_CPU_INTEL         },
  27     { "NexGenDriven", VPX_CPU_NEXGEN        },
  28     { "Geode by NSC", VPX_CPU_NSC           },
  29     { "RiseRiseRise", VPX_CPU_RISE          },
  30     { "SiS SiS SiS ", VPX_CPU_SIS           },
  31     { "GenuineTMx86", VPX_CPU_TRANSMETA     },
  32     { "TransmetaCPU", VPX_CPU_TRANSMETA_OLD },
  33     { "UMC UMC UMC ", VPX_CPU_UMC           },
  34     { "VIA VIA VIA ", VPX_CPU_VIA           },
  35 };
  36
  37 vpx_cpu_t vpx_x86_vendor(void)
  38 {
  39     unsigned int reg_eax;
  40     unsigned int vs[3];
  41     int i;
  42
  43     /* Get the Vendor String from the CPU */
  44     cpuid(0, reg_eax, vs[0], vs[2], vs[1]);
  45
  46     for (i = 0; i < VPX_CPU_LAST; i++)
  47     {
  48         if (strncmp ((const char *)vs, cpuid_vendor_list[i].vendor_string, 12) == 0)
  49            return (cpuid_vendor_list[i].vendor_id);
  50     }
  51
  52     return VPX_CPU_UNKNOWN;
  53 }