Implement date library functions in C++.

src/ia32/full-codegen-ia32.cc

Index: src/ia32/full-codegen-ia32.cc
diff --git a/src/ia32/full-codegen-ia32.cc b/src/ia32/full-codegen-ia32.cc
index d0d36b06be655588b3dec0f229f4e87543fbec83..57a853849db5e390038c0a1d2da1faf413f6793d 100644
--- a/src/ia32/full-codegen-ia32.cc
+++ b/src/ia32/full-codegen-ia32.cc
@@ -2965,18 +2965,41 @@ void FullCodeGenerator::EmitDateField(CallRuntime* expr) {
   ZoneList<Expression*>* args = expr->arguments();
   ASSERT(args->length() == 2);
   ASSERT_NE(NULL, args->at(1)->AsLiteral());
-  int index = Smi::cast(*(args->at(1)->AsLiteral()->handle()))->value();
+  Smi* index = Smi::cast(*(args->at(1)->AsLiteral()->handle()));
 
   VisitForAccumulatorValue(args->at(0));  // Load the object.
 
+  Label runtime, done;
+  Register object = eax;
+  Register result = eax;
+  Register scratch = ecx;
+
 #ifdef DEBUG
-  __ AbortIfSmi(eax);
-  __ CmpObjectType(eax, JS_DATE_TYPE, ebx);
+  __ AbortIfSmi(object);
+  __ CmpObjectType(object, JS_DATE_TYPE, scratch);
   __ Assert(equal, "Trying to get date field from non-date.");
 #endif
 
-  __ mov(eax, FieldOperand(eax, JSDate::kValueOffset + kPointerSize * index));
-  context()->Plug(eax);
+  if (index->value() == 0) {
+    __ mov(result, FieldOperand(object, JSDate::kValueOffset));
+  } else {
+    if (index->value() < JSDate::kFirstUncachedField) {
+      ExternalReference stamp = ExternalReference::date_cache_stamp(isolate());
+      __ mov(scratch, Operand::StaticVariable(stamp));
+      __ cmp(scratch, FieldOperand(object, JSDate::kCacheStampOffset));
+      __ j(not_equal, &runtime, Label::kNear);
+      __ mov(result, FieldOperand(object, JSDate::kValueOffset +
+                                          kPointerSize * index->value()));
+      __ jmp(&done);
+    }
+    __ bind(&runtime);
+    __ PrepareCallCFunction(2, scratch);
+    __ mov(Operand(esp, 0), object);
+    __ mov(Operand(esp, 1 * kPointerSize), Immediate(index));
+    __ CallCFunction(ExternalReference::get_date_field_function(isolate()), 2);
+    __ bind(&done);
+  }
+  context()->Plug(result);
 }
 
 
@@ -3026,36 +3049,6 @@ void FullCodeGenerator::EmitSetValueOf(CallRuntime* expr) {
 }
 
 
-void FullCodeGenerator::EmitSetDateField(CallRuntime* expr) {
-  ZoneList<Expression*>* args = expr->arguments();
-  ASSERT(args->length() == 3);
-  ASSERT_NE(NULL, args->at(1)->AsLiteral());
-  int index = Smi::cast(*(args->at(1)->AsLiteral()->handle()))->value();
-
-  VisitForStackValue(args->at(0));  // Load the object.
-  VisitForAccumulatorValue(args->at(2));  // Load the value.
-  __ pop(ebx);  // eax = value. ebx = object.
-
-#ifdef DEBUG
-  __ AbortIfSmi(ebx);
-  __ CmpObjectType(ebx, JS_DATE_TYPE, ecx);
-  __ Assert(equal, "Trying to set date field on non-date.");
-#endif
-
-  // Store the value.
-  __ mov(FieldOperand(ebx, JSDate::kValueOffset + kPointerSize * index), eax);
-  // Caches can only be smi or NaN, so we can skip the write barrier for them.
-  if (index < JSDate::kFirstBarrierFree) {
-    // Update the write barrier.  Save the value as it will be
-    // overwritten by the write barrier code and is needed afterward.
-    __ mov(edx, eax);
-    __ RecordWriteField(ebx, JSDate::kValueOffset + kPointerSize * index,
-                        edx, ecx, kDontSaveFPRegs);
-  }
-  context()->Plug(eax);
-}
-
-
 void FullCodeGenerator::EmitNumberToString(CallRuntime* expr) {
   ZoneList<Expression*>* args = expr->arguments();
   ASSERT_EQ(args->length(), 1);