Convert runtime atomics functions to inline asm

src/runtime/runtime-atomics-x64.h

Index: src/runtime/runtime-atomics-x64.h
diff --git a/src/runtime/runtime-atomics-x64.h b/src/runtime/runtime-atomics-x64.h
new file mode 100644
index 0000000000000000000000000000000000000000..abaebeca35a0e5e90a5644dcb5833d47053c318d
--- /dev/null
+++ b/src/runtime/runtime-atomics-x64.h
@@ -0,0 +1,73 @@
+// Copyright 2016 the V8 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.
+
+#ifndef V8_RUNTIME_RUNTIME_ATOMICS_X64_H_
+#define V8_RUNTIME_RUNTIME_ATOMICS_X64_H_
+
+#include <stdint.h>
+
+namespace v8 {
+namespace internal {
+namespace atomics {
+
+uint8_t LoadSeqCst(uint8_t* p);
+int8_t LoadSeqCst(int8_t* p);
+uint16_t LoadSeqCst(uint16_t* p);
+int16_t LoadSeqCst(int16_t* p);
+uint32_t LoadSeqCst(uint32_t* p);
+int32_t LoadSeqCst(int32_t* p);
+void StoreSeqCst(uint8_t* p, uint8_t value);
+void StoreSeqCst(int8_t* p, int8_t value);
+void StoreSeqCst(uint16_t* p, uint16_t value);
+void StoreSeqCst(int16_t* p, int16_t value);
+void StoreSeqCst(uint32_t* p, uint32_t value);
+void StoreSeqCst(int32_t* p, int32_t value);
+uint8_t AddSeqCst(uint8_t* p, uint8_t value);
+int8_t AddSeqCst(int8_t* p, int8_t value);
+uint16_t AddSeqCst(uint16_t* p, uint16_t value);
+int16_t AddSeqCst(int16_t* p, int16_t value);
+uint32_t AddSeqCst(uint32_t* p, uint32_t value);
+int32_t AddSeqCst(int32_t* p, int32_t value);
+uint8_t SubSeqCst(uint8_t* p, uint8_t value);
+int8_t SubSeqCst(int8_t* p, int8_t value);
+uint16_t SubSeqCst(uint16_t* p, uint16_t value);
+int16_t SubSeqCst(int16_t* p, int16_t value);
+uint32_t SubSeqCst(uint32_t* p, uint32_t value);
+int32_t SubSeqCst(int32_t* p, int32_t value);
+uint8_t ExchangeSeqCst(uint8_t* p, uint8_t value);
+int8_t ExchangeSeqCst(int8_t* p, int8_t value);
+uint16_t ExchangeSeqCst(uint16_t* p, uint16_t value);
+int16_t ExchangeSeqCst(int16_t* p, int16_t value);
+uint32_t ExchangeSeqCst(uint32_t* p, uint32_t value);
+int32_t ExchangeSeqCst(int32_t* p, int32_t value);
+uint8_t CompareExchangeSeqCst(uint8_t* p, uint8_t oldval, uint8_t newval);
+int8_t CompareExchangeSeqCst(int8_t* p, int8_t oldval, int8_t newval);
+uint16_t CompareExchangeSeqCst(uint16_t* p, uint16_t oldval, uint16_t newval);
+int16_t CompareExchangeSeqCst(int16_t* p, int16_t oldval, int16_t newval);
+uint32_t CompareExchangeSeqCst(uint32_t* p, uint32_t oldval, uint32_t newval);
+int32_t CompareExchangeSeqCst(int32_t* p, int32_t oldval, int32_t newval);
+uint8_t AndSeqCst(uint8_t* p, uint8_t value);
+int8_t AndSeqCst(int8_t* p, int8_t value);
+uint16_t AndSeqCst(uint16_t* p, uint16_t value);
+int16_t AndSeqCst(int16_t* p, int16_t value);
+uint32_t AndSeqCst(uint32_t* p, uint32_t value);
+int32_t AndSeqCst(int32_t* p, int32_t value);
+uint8_t OrSeqCst(uint8_t* p, uint8_t value);
+int8_t OrSeqCst(int8_t* p, int8_t value);
+uint16_t OrSeqCst(uint16_t* p, uint16_t value);
+int16_t OrSeqCst(int16_t* p, int16_t value);
+uint32_t OrSeqCst(uint32_t* p, uint32_t value);
+int32_t OrSeqCst(int32_t* p, int32_t value);
+uint8_t XorSeqCst(uint8_t* p, uint8_t value);
+int8_t XorSeqCst(int8_t* p, int8_t value);
+uint16_t XorSeqCst(uint16_t* p, uint16_t value);
+int16_t XorSeqCst(int16_t* p, int16_t value);
+uint32_t XorSeqCst(uint32_t* p, uint32_t value);
+int32_t XorSeqCst(int32_t* p, int32_t value);
+
+}  // namespace atomics
+}  // namespace internal
+}  // namespace v8
+
+#endif  // V8_RUNTIME_RUNTIME_ATOMICS_X64_H_