add unit test support via google test

adds unit testing via google test

Change-Id: I144b50a976d79251fc5135186a4e0a5051ed0e8c

third_party/libyuv/source/cpu_id.c

@@ -0,0 +1,81 @@
+/*
+ *  Copyright (c) 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.
+ */
+
+#include "third_party/libyuv/include/libyuv/cpu_id.h"
+
+#ifdef _MSC_VER
+#include <intrin.h>
+#endif
+#ifdef __ANDROID__
+#include <cpu-features.h>
+#endif
+
+#include "third_party/libyuv/include/libyuv/basic_types.h"  // for CPU_X86
+
+// TODO(fbarchard): Use cpuid.h when gcc 4.4 is used on OSX and Linux.
+#if (defined(__pic__) || defined(__APPLE__)) && defined(__i386__)
+static inline void __cpuid(int cpu_info[4], int info_type) {
+  asm volatile (
+    "mov %%ebx, %%edi                          \n"
+    "cpuid                                     \n"
+    "xchg %%edi, %%ebx                         \n"
+    : "=a"(cpu_info[0]), "=D"(cpu_info[1]), "=c"(cpu_info[2]), "=d"(cpu_info[3])
+    : "a"(info_type)
+  );
+}
+#elif defined(__i386__) || defined(__x86_64__)
+static inline void __cpuid(int cpu_info[4], int info_type) {
+  asm volatile (
+    "cpuid                                     \n"
+    : "=a"(cpu_info[0]), "=b"(cpu_info[1]), "=c"(cpu_info[2]), "=d"(cpu_info[3])
+    : "a"(info_type)
+  );
+}
+#endif
+
+#ifdef __cplusplus
+namespace libyuv {
+extern "C" {
+#endif
+
+// CPU detect function for SIMD instruction sets.
+int cpu_info_ = 0;
+
+int InitCpuFlags() {
+#ifdef CPU_X86
+  int cpu_info[4];
+  __cpuid(cpu_info, 1);
+  cpu_info_ = (cpu_info[3] & 0x04000000 ? kCpuHasSSE2 : 0) |
+              (cpu_info[2] & 0x00000200 ? kCpuHasSSSE3 : 0) |
+              kCpuInitialized;
+#elif defined(__ANDROID__) && defined(__ARM_NEON__)
+  uint64_t features = android_getCpuFeatures();
+  cpu_info_ = ((features & ANDROID_CPU_ARM_FEATURE_NEON) ? kCpuHasNEON : 0) |
+              kCpuInitialized;
+#elif defined(__ARM_NEON__)
+  // gcc -mfpu=neon defines __ARM_NEON__
+  // Enable Neon if you want support for Neon and Arm, and use MaskCpuFlags
+  // to disable Neon on devices that do not have it.
+  cpu_info_ = kCpuHasNEON | kCpuInitialized;
+#else
+  cpu_info_ = kCpuInitialized;
+#endif
+  return cpu_info_;
+}
+
+void MaskCpuFlags(int enable_flags) {
+  InitCpuFlags();
+  cpu_info_ = (cpu_info_ & enable_flags) | kCpuInitialized;
+}
+
+#ifdef __cplusplus
+}  // extern "C"
+}  // namespace libyuv
+#endif