Convert runtime atomics functions to inline asm

tools/gyp/v8.gyp

Index: tools/gyp/v8.gyp
diff --git a/tools/gyp/v8.gyp b/tools/gyp/v8.gyp
index fb8c218c6f83568d8914b1bcc162d8db7d501d94..8e66b6f9703341aad10a2b8f5b0685356d09ccdb 100644
--- a/tools/gyp/v8.gyp
+++ b/tools/gyp/v8.gyp
@@ -974,6 +974,7 @@
         '../../src/runtime-profiler.h',
         '../../src/runtime/runtime-array.cc',
         '../../src/runtime/runtime-atomics.cc',
+        '../../src/runtime/runtime-atomics-intrinsics-inl.h',
         '../../src/runtime/runtime-classes.cc',
         '../../src/runtime/runtime-collections.cc',
         '../../src/runtime/runtime-compiler.cc',
@@ -1221,6 +1222,8 @@
             '../../src/ic/ia32/stub-cache-ia32.cc',
             '../../src/regexp/ia32/regexp-macro-assembler-ia32.cc',
             '../../src/regexp/ia32/regexp-macro-assembler-ia32.h',
+            '../../src/runtime/runtime-atomics-ia32-inl.h',
+            '../../src/runtime/runtime-atomics-x64-inl.h',
           ],
         }],
         ['v8_target_arch=="x87"', {
@@ -1381,6 +1384,7 @@
             '../../src/ic/x64/stub-cache-x64.cc',
             '../../src/regexp/x64/regexp-macro-assembler-x64.cc',
             '../../src/regexp/x64/regexp-macro-assembler-x64.h',
+            '../../src/runtime/runtime-atomics-x64-inl.h',
           ],
         }],
         ['v8_target_arch=="x64"', {
@@ -1435,6 +1439,12 @@
             '../../src/regexp/ppc/regexp-macro-assembler-ppc.h',
           ],
         }],
+        ['OS=="win" and v8_target_arch=="x64"', {
+          'sources': [
+            '../../src/runtime/runtime-atomics-x64.asm',
+            '../../src/runtime/runtime-atomics-x64.h',
+          ],
+        }],
         ['OS=="win"', {
           'variables': {
             'gyp_generators': '<!(echo $GYP_GENERATORS)',