src/mesa/main/cpuinfo.c

   1 /*
   2  * Mesa 3-D graphics library
   3  *
   4  * Copyright (C) 2009  VMware, Inc.  All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the "Software"),
   8  * to deal in the Software without restriction, including without limitation
   9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10  * and/or sell copies of the Software, and to permit persons to whom the
  11  * Software is furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included
  14  * in all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  17  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  22  * OTHER DEALINGS IN THE SOFTWARE.
  23  */
  24
  25
  26 #include <stdlib.h>
  27 #include <string.h>
  28 #include <assert.h>
  29
  30 #include "main/cpuinfo.h"
  31
  32
  33 /**
  34  * This function should be called before the various "cpu_has_foo" macros
  35  * are used.
  36  */
  37 void
  38 _mesa_get_cpu_features(void)
  39 {
  40 #if defined USE_X86_ASM || defined USE_X86_64_ASM
  41    _mesa_get_x86_features();
  42 #endif
  43 }
  44
  45
  46 /**
  47  * Return a string describing the CPU architexture and extensions that
  48  * Mesa is using (such as SSE or Altivec).
  49  * \return information string, free it with free()
  50  */
  51 char *
  52 _mesa_get_cpu_string(void)
  53 {
  54 #define MAX_STRING 50
  55    char *buffer;
  56
  57    buffer = malloc(MAX_STRING);
  58    if (!buffer)
  59       return NULL;
  60
  61    buffer[0] = 0;
  62
  63 #ifdef USE_X86_ASM
  64
  65    if (_mesa_x86_cpu_features) {
  66       strcat(buffer, "x86");
  67    }
  68
  69 # ifdef USE_MMX_ASM
  70    if (cpu_has_mmx) {
  71       strcat(buffer, (cpu_has_mmxext) ? "/MMX+" : "/MMX");
  72    }
  73 # endif
  74 # ifdef USE_3DNOW_ASM
  75    if (cpu_has_3dnow) {
  76       strcat(buffer, (cpu_has_3dnowext) ? "/3DNow!+" : "/3DNow!");
  77    }
  78 # endif
  79 # ifdef USE_SSE_ASM
  80    if (cpu_has_xmm) {
  81       strcat(buffer, (cpu_has_xmm2) ? "/SSE2" : "/SSE");
  82    }
  83 # endif
  84
  85 #elif defined(USE_SPARC_ASM)
  86
  87    strcat(buffer, "SPARC");
  88
  89 #endif
  90
  91    assert(strlen(buffer) < MAX_STRING);
  92
  93    return buffer;
  94 }