MIPS: Port Date-related changes.

src/mips/lithium-codegen-mips.cc

Index: src/mips/lithium-codegen-mips.cc
diff --git a/src/mips/lithium-codegen-mips.cc b/src/mips/lithium-codegen-mips.cc
index d0531ec71ae7b35f1bb878cdcdb08dc5ae6569dd..607025cbdced12d3b47713418c12aa71d6481ee1 100644
--- a/src/mips/lithium-codegen-mips.cc
+++ b/src/mips/lithium-codegen-mips.cc
@@ -1261,6 +1261,46 @@ void LCodeGen::DoValueOf(LValueOf* instr) {
 }
 
 
+void LCodeGen::DoDateField(LDateField* instr) {
+  Register object = ToRegister(instr->InputAt(0));
+  Register result = ToRegister(instr->result());
+  Register scratch = ToRegister(instr->TempAt(0));
+  Smi* index = instr->index();
+  Label runtime, done;
+  ASSERT(object.is(a0));
+  ASSERT(result.is(v0));
+  ASSERT(!scratch.is(scratch0()));
+  ASSERT(!scratch.is(object));
+
+#ifdef DEBUG
+  __ AbortIfSmi(object);
+  __ GetObjectType(object, scratch, scratch);
+  __ Assert(eq, "Trying to get date field from non-date.",
+      scratch, Operand(JS_DATE_TYPE));
+#endif
+
+  if (index->value() == 0) {
+    __ lw(result, FieldMemOperand(object, JSDate::kValueOffset));
+  } else {
+    if (index->value() < JSDate::kFirstUncachedField) {
+      ExternalReference stamp = ExternalReference::date_cache_stamp(isolate());
+      __ li(scratch, Operand(stamp));
+      __ lw(scratch, MemOperand(scratch));
+      __ lw(scratch0(), FieldMemOperand(object, JSDate::kCacheStampOffset));
+      __ Branch(&runtime, ne, scratch, Operand(scratch0()));
+      __ lw(result, FieldMemOperand(object, JSDate::kValueOffset +
+                                            kPointerSize * index->value()));
+      __ jmp(&done);
+    }
+    __ bind(&runtime);
+    __ PrepareCallCFunction(2, scratch);
+    __ li(a1, Operand(index));
+    __ CallCFunction(ExternalReference::get_date_field_function(isolate()), 2);
+    __ bind(&done);
+  }
+}
+
+
 void LCodeGen::DoBitNotI(LBitNotI* instr) {
   Register input = ToRegister(instr->InputAt(0));
   Register result = ToRegister(instr->result());