remove mips dsp detect.

source/cpu_id.cc

 /*
  *  Copyright 2011 The LibYuv Project Authors. All rights reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS. All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 133 matching lines @@
       if (p && (p[6] == ' ' || p[6] == '\n')) {
         fclose(f);
         return kCpuHasNEON;
       }
     }
   }
   fclose(f);
   return 0;
 }
 
-#if defined(__mips__) && defined(__linux__)
-static int MipsCpuCaps(const char* search_string) {
-  char cpuinfo_line[512];
-  const char* file_name = "/proc/cpuinfo";
-  FILE* f = fopen(file_name, "r");
-  if (!f) {
-    // Assume DSP if /proc/cpuinfo is unavailable.
-    // This will occur for Chrome sandbox for Pepper or Render process.
-    return kCpuHasMIPS_DSP;
-  }
-  while (fgets(cpuinfo_line, sizeof(cpuinfo_line) - 1, f) != NULL) {
-    if (strstr(cpuinfo_line, search_string) != NULL) {
-      fclose(f);
-      return kCpuHasMIPS_DSP;
-    }
-  }
-  fclose(f);
-  return 0;
-}
-#endif
-
 // CPU detect function for SIMD instruction sets.
 LIBYUV_API
 int cpu_info_ = 0;  // cpu_info is not initialized yet.
 
 // Test environment variable for disabling CPU features. Any non-zero value
 // to disable. Zero ignored to make it easy to set the variable on/off.
 #if !defined(__native_client__) && !defined(_M_ARM)
 
 static LIBYUV_BOOL TestEnv(const char* name) {
   const char* var = getenv(name);
@@ skipping 70 matching lines @@
     cpu_info &= ~kCpuHasERMS;
   }
   if (TestEnv("LIBYUV_DISABLE_FMA3")) {
     cpu_info &= ~kCpuHasFMA3;
   }
   if (TestEnv("LIBYUV_DISABLE_AVX3")) {
     cpu_info &= ~kCpuHasAVX3;
   }
 #endif
 #if defined(__mips__) && defined(__linux__)
-  // Linux mips parse text file for dsp detect.
-  cpu_info = MipsCpuCaps("dsp");  // set kCpuHasMIPS_DSP.
 #if defined(__mips_dspr2)
   cpu_info |= kCpuHasMIPS_DSPR2;
 #endif
   cpu_info |= kCpuHasMIPS;
 
   if (getenv("LIBYUV_DISABLE_MIPS")) {
     cpu_info &= ~kCpuHasMIPS;
   }
-  if (getenv("LIBYUV_DISABLE_MIPS_DSP")) {
-    cpu_info &= ~kCpuHasMIPS_DSP;
-  }
   if (getenv("LIBYUV_DISABLE_MIPS_DSPR2")) {
     cpu_info &= ~kCpuHasMIPS_DSPR2;
   }
 #endif
 #if defined(__arm__) || defined(__aarch64__)
 // gcc -mfpu=neon defines __ARM_NEON__
 // __ARM_NEON__ generates code that requires Neon.  NaCL also requires Neon.
 // For Linux, /proc/cpuinfo can be tested but without that assume Neon.
 #if defined(__ARM_NEON__) || defined(__native_client__) || !defined(__linux__)
   cpu_info = kCpuHasNEON;
@@ skipping 23 matching lines @@
 // Note that use of this function is not thread safe.
 LIBYUV_API
 void MaskCpuFlags(int enable_flags) {
   cpu_info_ = InitCpuFlags() & enable_flags;
 }
 
 #ifdef __cplusplus
 }  // extern "C"
 }  // namespace libyuv
 #endif