Revert of [builtins] Refactor the remaining Date builtins.

src/full-codegen/mips/full-codegen-mips.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #if V8_TARGET_ARCH_MIPS
 
 // Note on Mips implementation:
 //
 // The result_register() for mips is the 'v0' register, which is defined
 // by the ABI to contain function return values. However, the first
@@ skipping 3408 matching lines @@
 
   __ JumpIfSmi(v0, if_false);
   __ GetObjectType(v0, a1, a1);
   PrepareForBailoutBeforeSplit(expr, true, if_true, if_false);
   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 = t5;
+  Register scratch1 = a1;
+
+  if (index->value() == 0) {
+    __ lw(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));
+      __ lw(scratch1, MemOperand(scratch1));
+      __ lw(scratch0, FieldMemOperand(object, JSDate::kCacheStampOffset));
+      __ Branch(&runtime, ne, scratch1, Operand(scratch0));
+      __ lw(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);
+}
+
+
 void FullCodeGenerator::EmitOneByteSeqStringSetChar(CallRuntime* expr) {
   ZoneList<Expression*>* args = expr->arguments();
   DCHECK_EQ(3, args->length());
 
   Register string = v0;
   Register index = a1;
   Register value = a2;
 
   VisitForStackValue(args->at(0));        // index
   VisitForStackValue(args->at(1));        // value
@@ skipping 1393 matching lines @@
          reinterpret_cast<uint32_t>(
              isolate->builtins()->OsrAfterStackCheck()->entry()));
   return OSR_AFTER_STACK_CHECK;
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_MIPS