Revert of [builtins] Refactor the remaining Date builtins.

src/full-codegen/mips64/full-codegen-mips64.cc

Index: src/full-codegen/mips64/full-codegen-mips64.cc
diff --git a/src/full-codegen/mips64/full-codegen-mips64.cc b/src/full-codegen/mips64/full-codegen-mips64.cc
index b75965e31d2f83facf6d22fd9b8597799a9e9b6d..03133e150ff7e55819c50cb40f9d7851d5a9e506 100644
--- a/src/full-codegen/mips64/full-codegen-mips64.cc
+++ b/src/full-codegen/mips64/full-codegen-mips64.cc
@@ -3428,6 +3428,45 @@
   Split(eq, a1, Operand(JS_DATE_TYPE), if_true, if_false, fall_through);
 
   context()->Plug(if_true, if_false);
+}
+
+
+void FullCodeGenerator::EmitDateField(CallRuntime* expr) {
+  ZoneList<Expression*>* args = expr->arguments();
+  DCHECK(args->length() == 2);
+  DCHECK_NOT_NULL(args->at(1)->AsLiteral());
+  Smi* index = Smi::cast(*(args->at(1)->AsLiteral()->value()));
+
+  VisitForAccumulatorValue(args->at(0));  // Load the object.
+
+  Register object = v0;
+  Register result = v0;
+  Register scratch0 = t1;
+  Register scratch1 = a1;
+
+  if (index->value() == 0) {
+    __ ld(result, FieldMemOperand(object, JSDate::kValueOffset));
+  } else {
+    Label runtime, done;
+    if (index->value() < JSDate::kFirstUncachedField) {
+      ExternalReference stamp = ExternalReference::date_cache_stamp(isolate());
+      __ li(scratch1, Operand(stamp));
+      __ ld(scratch1, MemOperand(scratch1));
+      __ ld(scratch0, FieldMemOperand(object, JSDate::kCacheStampOffset));
+      __ Branch(&runtime, ne, scratch1, Operand(scratch0));
+      __ ld(result, FieldMemOperand(object, JSDate::kValueOffset +
+                                            kPointerSize * index->value()));
+      __ jmp(&done);
+    }
+    __ bind(&runtime);
+    __ PrepareCallCFunction(2, scratch1);
+    __ li(a1, Operand(index));
+    __ Move(a0, object);
+    __ CallCFunction(ExternalReference::get_date_field_function(isolate()), 2);
+    __ bind(&done);
+  }
+
+  context()->Plug(result);
 }