src/mesa/main/cpuinfo.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  7.5
   4  *
   5  * Copyright (C) 2009  VMware, Inc.  All Rights Reserved.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the "Software"),
   9  * to deal in the Software without restriction, including without limitation
  10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  11  * and/or sell copies of the Software, and to permit persons to whom the
  12  * Software is furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included
  15  * in all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  21  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  22  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  23  * OTHER DEALINGS IN THE SOFTWARE.
  24  */
  25
  26
  27 #include "main/compiler.h"
  28 #include "main/cpuinfo.h"
  29
  30
  31 /**
  32  * This function should be called before the various "cpu_has_foo" macros
  33  * are used.
  34  */
  35 void
  36 _mesa_get_cpu_features(void)
  37 {
  38 #ifdef USE_X86_ASM
  39    _mesa_get_x86_features();
  40 #endif
  41 }
  42
  43
  44 /**
  45  * Return a string describing the CPU architexture and extensions that
  46  * Mesa is using (such as SSE or Altivec).
  47  * \return information string, free it with free()
  48  */
  49 char *
  50 _mesa_get_cpu_string(void)
  51 {
  52 #define MAX_STRING 50
  53    char *buffer;
  54
  55    buffer = malloc(MAX_STRING);
  56    if (!buffer)
  57       return NULL;
  58
  59    buffer[0] = 0;
  60
  61 #ifdef USE_X86_ASM
  62
  63    if (_mesa_x86_cpu_features) {
  64       strcat(buffer, "x86");
  65    }
  66
  67 # ifdef USE_MMX_ASM
  68    if (cpu_has_mmx) {
  69       strcat(buffer, (cpu_has_mmxext) ? "/MMX+" : "/MMX");
  70    }
  71 # endif
  72 # ifdef USE_3DNOW_ASM
  73    if (cpu_has_3dnow) {
  74       strcat(buffer, (cpu_has_3dnowext) ? "/3DNow!+" : "/3DNow!");
  75    }
  76 # endif
  77 # ifdef USE_SSE_ASM
  78    if (cpu_has_xmm) {
  79       strcat(buffer, (cpu_has_xmm2) ? "/SSE2" : "/SSE");
  80    }
  81 # endif
  82
  83 #elif defined(USE_SPARC_ASM)
  84
  85    strcat(buffer, "SPARC");
  86
  87 #endif
  88
  89    assert(strlen(buffer) < MAX_STRING);
  90
  91    return buffer;
  92 }