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      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 }
     92