New class for Date objects: caches individual date components.

src/ia32/full-codegen-ia32.cc

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 2857 matching lines @@
   // If the object is not a value type, return the object.
   __ CmpObjectType(eax, JS_VALUE_TYPE, ebx);
   __ j(not_equal, &done, Label::kNear);
   __ mov(eax, FieldOperand(eax, JSValue::kValueOffset));
 
   __ bind(&done);
   context()->Plug(eax);
 }
 
 
+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();
+
+  VisitForAccumulatorValue(args->at(0));  // Load the object.
+
+#ifdef DEBUG
+  __ AbortIfSmi(eax);
+  __ CmpObjectType(eax, JS_DATE_TYPE, ebx);
+  __ Assert(equal, "Trying to get date field from non-date.");
+#endif
+
+  __ mov(eax, FieldOperand(eax, JSDate::kValueOffset + kPointerSize * index));
+  context()->Plug(eax);
+}
+
+
 void FullCodeGenerator::EmitMathPow(CallRuntime* expr) {
   // Load the arguments on the stack and call the runtime function.
   ZoneList<Expression*>* args = expr->arguments();
   ASSERT(args->length() == 2);
   VisitForStackValue(args->at(0));
   VisitForStackValue(args->at(1));
 
   if (CpuFeatures::IsSupported(SSE2)) {
     MathPowStub stub(MathPowStub::ON_STACK);
     __ CallStub(&stub);
@@ skipping 26 matching lines @@
   // 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, JSValue::kValueOffset, edx, ecx, kDontSaveFPRegs);
 
   __ bind(&done);
   context()->Plug(eax);
 }
 
 
+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);
 
   // Load the argument on the stack and call the stub.
   VisitForStackValue(args->at(0));
 
   NumberToStringStub stub;
   __ CallStub(&stub);
   context()->Plug(eax);
@@ skipping 1446 matching lines @@
   *context_length = 0;
   return previous_;
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_IA32