Move libvpx from DEPS to src

third_party/libvpx/source/libvpx/test/register_state_check.h

Index: third_party/libvpx/source/libvpx/test/register_state_check.h
diff --git a/third_party/libvpx/source/libvpx/test/register_state_check.h b/third_party/libvpx/source/libvpx/test/register_state_check.h
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index 0000000000000000000000000000000000000000..8d4beea5f06006a02ad5df8bca4e3f9bf0e2fde6
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+++ b/third_party/libvpx/source/libvpx/test/register_state_check.h
@@ -0,0 +1,196 @@
+/*
+ *  Copyright (c) 2012 The WebM 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.
+ */
+
+#ifndef TEST_REGISTER_STATE_CHECK_H_
+#define TEST_REGISTER_STATE_CHECK_H_
+
+#include "third_party/googletest/src/include/gtest/gtest.h"
+#include "./vpx_config.h"
+#include "vpx/vpx_integer.h"
+
+// ASM_REGISTER_STATE_CHECK(asm_function)
+//   Minimally validates the environment pre & post function execution. This
+//   variant should be used with assembly functions which are not expected to
+//   fully restore the system state. See platform implementations of
+//   RegisterStateCheck for details.
+//
+// API_REGISTER_STATE_CHECK(api_function)
+//   Performs all the checks done by ASM_REGISTER_STATE_CHECK() and any
+//   additional checks to ensure the environment is in a consistent state pre &
+//   post function execution. This variant should be used with API functions.
+//   See platform implementations of RegisterStateCheckXXX for details.
+//
+
+#if defined(_WIN64)
+
+#define _WIN32_LEAN_AND_MEAN
+#include <windows.h>
+#include <winnt.h>
+
+namespace testing {
+namespace internal {
+
+inline bool operator==(const M128A& lhs, const M128A& rhs) {
+  return (lhs.Low == rhs.Low && lhs.High == rhs.High);
+}
+
+}  // namespace internal
+}  // namespace testing
+
+namespace libvpx_test {
+
+// Compares the state of xmm[6-15] at construction with their state at
+// destruction. These registers should be preserved by the callee on
+// Windows x64.
+class RegisterStateCheck {
+ public:
+  RegisterStateCheck() { initialized_ = StoreRegisters(&pre_context_); }
+  ~RegisterStateCheck() { EXPECT_TRUE(Check()); }
+
+ private:
+  static bool StoreRegisters(CONTEXT* const context) {
+    const HANDLE this_thread = GetCurrentThread();
+    EXPECT_TRUE(this_thread != NULL);
+    context->ContextFlags = CONTEXT_FLOATING_POINT;
+    const bool context_saved = GetThreadContext(this_thread, context) == TRUE;
+    EXPECT_TRUE(context_saved) << "GetLastError: " << GetLastError();
+    return context_saved;
+  }
+
+  // Compares the register state. Returns true if the states match.
+  bool Check() const {
+    if (!initialized_) return false;
+    CONTEXT post_context;
+    if (!StoreRegisters(&post_context)) return false;
+
+    const M128A* xmm_pre = &pre_context_.Xmm6;
+    const M128A* xmm_post = &post_context.Xmm6;
+    for (int i = 6; i <= 15; ++i) {
+      EXPECT_EQ(*xmm_pre, *xmm_post) << "xmm" << i << " has been modified!";
+      ++xmm_pre;
+      ++xmm_post;
+    }
+    return !testing::Test::HasNonfatalFailure();
+  }
+
+  bool initialized_;
+  CONTEXT pre_context_;
+};
+
+#define ASM_REGISTER_STATE_CHECK(statement) do {  \
+  libvpx_test::RegisterStateCheck reg_check;      \
+  statement;                                      \
+} while (false)
+
+}  // namespace libvpx_test
+
+#elif defined(CONFIG_SHARED) && defined(HAVE_NEON_ASM) && defined(CONFIG_VP9) \
+      && !CONFIG_SHARED && HAVE_NEON_ASM && CONFIG_VP9
+
+extern "C" {
+// Save the d8-d15 registers into store.
+void vp9_push_neon(int64_t *store);
+}
+
+namespace libvpx_test {
+
+// Compares the state of d8-d15 at construction with their state at
+// destruction. These registers should be preserved by the callee on
+// arm platform.
+class RegisterStateCheck {
+ public:
+  RegisterStateCheck() { initialized_ = StoreRegisters(pre_store_); }
+  ~RegisterStateCheck() { EXPECT_TRUE(Check()); }
+
+ private:
+  static bool StoreRegisters(int64_t store[8]) {
+    vp9_push_neon(store);
+    return true;
+  }
+
+  // Compares the register state. Returns true if the states match.
+  bool Check() const {
+    if (!initialized_) return false;
+    int64_t post_store[8];
+    vp9_push_neon(post_store);
+    for (int i = 0; i < 8; ++i) {
+      EXPECT_EQ(pre_store_[i], post_store[i]) << "d"
+          << i + 8 << " has been modified";
+    }
+    return !testing::Test::HasNonfatalFailure();
+  }
+
+  bool initialized_;
+  int64_t pre_store_[8];
+};
+
+#define ASM_REGISTER_STATE_CHECK(statement) do {  \
+  libvpx_test::RegisterStateCheck reg_check;      \
+  statement;                                      \
+} while (false)
+
+}  // namespace libvpx_test
+
+#else
+
+namespace libvpx_test {
+
+class RegisterStateCheck {};
+#define ASM_REGISTER_STATE_CHECK(statement) statement
+
+}  // namespace libvpx_test
+
+#endif  // _WIN64
+
+#if ARCH_X86 || ARCH_X86_64
+#if defined(__GNUC__)
+
+namespace libvpx_test {
+
+// Checks the FPU tag word pre/post execution to ensure emms has been called.
+class RegisterStateCheckMMX {
+ public:
+  RegisterStateCheckMMX() {
+    __asm__ volatile("fstenv %0" : "=rm"(pre_fpu_env_));
+  }
+  ~RegisterStateCheckMMX() { EXPECT_TRUE(Check()); }
+
+ private:
+  // Checks the FPU tag word pre/post execution, returning false if not cleared
+  // to 0xffff.
+  bool Check() const {
+    EXPECT_EQ(0xffff, pre_fpu_env_[4])
+        << "FPU was in an inconsistent state prior to call";
+
+    uint16_t post_fpu_env[14];
+    __asm__ volatile("fstenv %0" : "=rm"(post_fpu_env));
+    EXPECT_EQ(0xffff, post_fpu_env[4])
+        << "FPU was left in an inconsistent state after call";
+    return !testing::Test::HasNonfatalFailure();
+  }
+
+  uint16_t pre_fpu_env_[14];
+};
+
+#define API_REGISTER_STATE_CHECK(statement) do {  \
+  libvpx_test::RegisterStateCheckMMX reg_check;   \
+  ASM_REGISTER_STATE_CHECK(statement);            \
+} while (false)
+
+}  // namespace libvpx_test
+
+#endif  // __GNUC__
+#endif  // ARCH_X86 || ARCH_X86_64
+
+#ifndef API_REGISTER_STATE_CHECK
+#define API_REGISTER_STATE_CHECK ASM_REGISTER_STATE_CHECK
+#endif
+
+#endif  // TEST_REGISTER_STATE_CHECK_H_