Add f16c (halffloat) cpuid

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 211 matching lines @@
   int cpu_info = 0;
 #if !defined(__pnacl__) && !defined(__CLR_VER) && defined(CPU_X86)
   uint32 cpu_info0[4] = { 0, 0, 0, 0 };
   uint32 cpu_info1[4] = { 0, 0, 0, 0 };
   uint32 cpu_info7[4] = { 0, 0, 0, 0 };
   CpuId(0, 0, cpu_info0);
   CpuId(1, 0, cpu_info1);
   if (cpu_info0[0] >= 7) {
     CpuId(7, 0, cpu_info7);
   }
-  cpu_info = ((cpu_info1[3] & 0x04000000) ? kCpuHasSSE2 : 0) |
+  cpu_info = kCpuHasX86 |
+             ((cpu_info1[3] & 0x04000000) ? kCpuHasSSE2 : 0) |
              ((cpu_info1[2] & 0x00000200) ? kCpuHasSSSE3 : 0) |
              ((cpu_info1[2] & 0x00080000) ? kCpuHasSSE41 : 0) |
              ((cpu_info1[2] & 0x00100000) ? kCpuHasSSE42 : 0) |
-             ((cpu_info7[1] & 0x00000200) ? kCpuHasERMS : 0) |
-             ((cpu_info1[2] & 0x00001000) ? kCpuHasFMA3 : 0) |
-             kCpuHasX86;
+             ((cpu_info7[1] & 0x00000200) ? kCpuHasERMS : 0);
 
 #ifdef HAS_XGETBV
   // AVX requires CPU has AVX, XSAVE and OSXSave for xgetbv
   if (((cpu_info1[2] & 0x1c000000) == 0x1c000000) &&  // AVX and OSXSave
       ((GetXCR0() & 6) == 6)) {  // Test OS saves YMM registers
-    cpu_info |= ((cpu_info7[1] & 0x00000020) ? kCpuHasAVX2 : 0) | kCpuHasAVX;
+    cpu_info |= kCpuHasAVX |
+                ((cpu_info7[1] & 0x00000020) ? kCpuHasAVX2 : 0) |
+                ((cpu_info1[2] & 0x00001000) ? kCpuHasFMA3 : 0) |
+                ((cpu_info1[2] & 0x20000000) ? kCpuHasF16C : 0);
 
     // Detect AVX512bw
     if ((GetXCR0() & 0xe0) == 0xe0) {
       cpu_info |= (cpu_info7[1] & 0x40000000) ? kCpuHasAVX3 : 0;
     }
   }
 #endif
 
   // Environment variable overrides for testing.
   if (TestEnv("LIBYUV_DISABLE_X86")) {
@@ skipping 19 matching lines @@
   }
   if (TestEnv("LIBYUV_DISABLE_ERMS")) {
     cpu_info &= ~kCpuHasERMS;
   }
   if (TestEnv("LIBYUV_DISABLE_FMA3")) {
     cpu_info &= ~kCpuHasFMA3;
   }
   if (TestEnv("LIBYUV_DISABLE_AVX3")) {
     cpu_info &= ~kCpuHasAVX3;
   }
+  if (TestEnv("LIBYUV_DISABLE_F16C")) {
+    cpu_info &= ~kCpuHasF16C;
+  }
+
 #endif
 #if defined(__mips__) && defined(__linux__)
 #if defined(__mips_dspr2)
   cpu_info |= kCpuHasDSPR2;
 #endif
 #if defined(__mips_msa)
   cpu_info = MipsCpuCaps("/proc/cpuinfo", " msa");
 #endif
   cpu_info |= kCpuHasMIPS;
   if (getenv("LIBYUV_DISABLE_DSPR2")) {
@@ skipping 35 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