[Atomics] Make Atomics.store a builtin using TF

src/compiler/x64/code-generator-x64.cc

Index: src/compiler/x64/code-generator-x64.cc
diff --git a/src/compiler/x64/code-generator-x64.cc b/src/compiler/x64/code-generator-x64.cc
index 18ac9f9f3215b848d3a532098e8f577b909d0860..4d3a83a44ba4808a9a2943df1da11086a4c099fb 100644
--- a/src/compiler/x64/code-generator-x64.cc
+++ b/src/compiler/x64/code-generator-x64.cc
@@ -1718,6 +1718,24 @@ CodeGenerator::CodeGenResult CodeGenerator::AssembleArchInstruction(
       }
       break;
     }
+    case kX64Xchgb: {
+      size_t index = 0;
+      Operand operand = i.MemoryOperand(&index);
+      __ xchgb(i.InputRegister(index), operand);
+      break;
+    }
+    case kX64Xchgw: {
+      size_t index = 0;
+      Operand operand = i.MemoryOperand(&index);
+      __ xchgw(i.InputRegister(index), operand);
+      break;
+    }
+    case kX64Xchgl: {
+      size_t index = 0;
+      Operand operand = i.MemoryOperand(&index);
+      __ xchgl(i.InputRegister(index), operand);
+      break;
+    }
     case kCheckedLoadInt8:
       ASSEMBLE_CHECKED_LOAD_INTEGER(movsxbl);
       break;
@@ -1768,6 +1786,9 @@ CodeGenerator::CodeGenResult CodeGenerator::AssembleArchInstruction(
     case kAtomicLoadInt16:
     case kAtomicLoadUint16:
     case kAtomicLoadWord32:
+    case kAtomicStoreWord8:
+    case kAtomicStoreWord16:
+    case kAtomicStoreWord32:
       UNREACHABLE();  // Won't be generated by instruction selector.
       break;
   }