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 "main/imports.h"
  27 #include "main/cpuinfo.h"
  28
  29
  30 /**
  31  * This function should be called before the various "cpu_has_foo" macros
  32  * are used.
  33  */
  34 void
  35 _mesa_get_cpu_features(void)
  36 {
  37 #if defined USE_X86_ASM || defined USE_X86_64_ASM
  38    _mesa_get_x86_features();
  39 #endif
  40 }
  41
  42
  43 /**
  44  * Return a string describing the CPU architexture and extensions that
  45  * Mesa is using (such as SSE or Altivec).
  46  * \return information string, free it with free()
  47  */
  48 char *
  49 _mesa_get_cpu_string(void)
  50 {
  51 #define MAX_STRING 50
  52    char *buffer;
  53
  54    buffer = malloc(MAX_STRING);
  55    if (!buffer)
  56       return NULL;
  57
  58    buffer[0] = 0;
  59
  60 #ifdef USE_X86_ASM
  61
  62    if (_mesa_x86_cpu_features) {
  63       strcat(buffer, "x86");
  64    }
  65
  66 # ifdef USE_MMX_ASM
  67    if (cpu_has_mmx) {
  68       strcat(buffer, (cpu_has_mmxext) ? "/MMX+" : "/MMX");
  69    }
  70 # endif
  71 # ifdef USE_3DNOW_ASM
  72    if (cpu_has_3dnow) {
  73       strcat(buffer, (cpu_has_3dnowext) ? "/3DNow!+" : "/3DNow!");
  74    }
  75 # endif
  76 # ifdef USE_SSE_ASM
  77    if (cpu_has_xmm) {
  78       strcat(buffer, (cpu_has_xmm2) ? "/SSE2" : "/SSE");
  79    }
  80 # endif
  81
  82 #elif defined(USE_SPARC_ASM)
  83
  84    strcat(buffer, "SPARC");
  85
  86 #endif
  87
  88    assert(strlen(buffer) < MAX_STRING);
  89
  90    return buffer;
  91 }