text: /*
   * Copyright © 2000 SuSE, Inc.
   * Copyright © 2007 Red Hat, Inc.
   *
   * Permission to use, copy, modify, distribute, and sell this software and its
   * documentation for any purpose is hereby granted without fee, provided that
   * the above copyright notice appear in all copies and that both that
   * copyright notice and this permission notice appear in supporting
   * documentation, and that the name of SuSE not be used in advertising or
   * publicity pertaining to distribution of the software without specific,
   * written prior permission.  SuSE makes no representations about the
   * suitability of this software for any purpose.  It is provided "as is"
   * without express or implied warranty.
   *
   * SuSE DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL SuSE
   * BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
   * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
   * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
   * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
   */
  #ifdef HAVE_CONFIG_H
  #include <config.h>
  #endif
  
  #include "pixman-private.h"
  
  #if defined(USE_MIPS_DSPR2) || defined(USE_LOONGSON_MMI)
  
  #include <string.h>
  #include <stdlib.h>
  
  static pixman_bool_t
  have_feature (const char *search_string)
  {
  #if defined (__linux__) /* linux ELF */
      /* Simple detection of MIPS features at runtime for Linux.
       * It is based on /proc/cpuinfo, which reveals hardware configuration
       * to user-space applications.  According to MIPS (early 2010), no similar
       * facility is universally available on the MIPS architectures, so it's up
       * to individual OSes to provide such.
       */
      const char *file_name = "/proc/cpuinfo";
      char cpuinfo_line[256];
      FILE *f = NULL;
  
      if ((f = fopen (file_name, "r")) == NULL)
          return FALSE;
  
      while (fgets (cpuinfo_line, sizeof (cpuinfo_line), f) != NULL)
      {
          if (strstr (cpuinfo_line, search_string) != NULL)
          {
              fclose (f);
              return TRUE;
          }
      }
  
      fclose (f);
  #endif
  
      /* Did not find string in the proc file, or not Linux ELF. */
      return FALSE;
  }
  
  #endif
  
  pixman_implementation_t *
  _pixman_mips_get_implementations (pixman_implementation_t *imp)
  {
  #ifdef USE_LOONGSON_MMI
      /* I really don't know if some Loongson CPUs don't have MMI. */
      if (!_pixman_disabled ("loongson-mmi") && have_feature ("Loongson"))
  	imp = _pixman_implementation_create_mmx (imp);
  #endif
  
  #ifdef USE_MIPS_DSPR2
      if (!_pixman_disabled ("mips-dspr2"))
      {
  	int already_compiling_everything_for_dspr2 = 0;
  #if defined(__mips_dsp) && (__mips_dsp_rev >= 2)
  	already_compiling_everything_for_dspr2 = 1;
  #endif
  	if (already_compiling_everything_for_dspr2 ||
  	    /* Only currently available MIPS core that supports DSPr2 is 74K. */
  	    have_feature ("MIPS 74K"))
  	{
  	    imp = _pixman_implementation_create_mips_dspr2 (imp);
  	}
      }
  #endif
  
      return imp;
  }
  