[Atomics] Make Atomics.compareExchange 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 1a96a3a4c7950bdc9abbace94c806af4e1fdd954..7ecf442fc612a517498a1250ddfffc623b04eb28 100644
--- a/src/compiler/x64/code-generator-x64.cc
+++ b/src/compiler/x64/code-generator-x64.cc
@@ -2243,6 +2243,30 @@ CodeGenerator::CodeGenResult CodeGenerator::AssembleArchInstruction(
       __ xchgl(i.InputRegister(0), i.MemoryOperand(1));
       break;
     }
+    case kAtomicCompareExchangeInt8: {
+      __ cmpxchgb(i.MemoryOperand(2), i.InputRegister(1));
+      __ movsxbl(rax, rax);
+      break;
+    }
+    case kAtomicCompareExchangeUint8: {
+      __ cmpxchgb(i.MemoryOperand(2), i.InputRegister(1));
+      __ movzxbl(rax, rax);
+      break;
+    }
+    case kAtomicCompareExchangeInt16: {
+      __ cmpxchgw(i.MemoryOperand(2), i.InputRegister(1));
+      __ movsxwl(rax, rax);
+      break;
+    }
+    case kAtomicCompareExchangeUint16: {
+      __ cmpxchgw(i.MemoryOperand(2), i.InputRegister(1));
+      __ movzxwl(rax, rax);
+      break;
+    }
+    case kAtomicCompareExchangeWord32: {
+      __ cmpxchgl(i.MemoryOperand(2), i.InputRegister(1));
+      break;
+    }
     case kAtomicLoadInt8:
     case kAtomicLoadUint8:
     case kAtomicLoadInt16: