From c416ddf166bb2f45cbd92c2e91f5bf93f9b2ca90 Mon Sep 17 00:00:00 2001
From: "ricow@chromium.org"
 <ricow@chromium.org@ce2b1a6d-e550-0410-aec6-3dcde31c8c00>
Date: Thu, 24 Feb 2011 19:25:22 +0000
Subject: [PATCH] X64: Implement DoHasInstanceType

Review URL: http://codereview.chromium.org/6581036

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@6940 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
---
 src/x64/lithium-codegen-x64.cc | 15 ++++++++++++++-
 src/x64/lithium-x64.cc         |  6 ++++--
 2 files changed, 18 insertions(+), 3 deletions(-)

diff --git a/src/x64/lithium-codegen-x64.cc b/src/x64/lithium-codegen-x64.cc
index 2332e5228e..08488ca9fe 100644
--- a/src/x64/lithium-codegen-x64.cc
+++ b/src/x64/lithium-codegen-x64.cc
@@ -1579,7 +1579,20 @@ static Condition BranchCondition(HHasInstanceType* instr) {
 
 
 void LCodeGen::DoHasInstanceType(LHasInstanceType* instr) {
-  Abort("Unimplemented: %s", "DoHasInstanceType");
+  Register input = ToRegister(instr->InputAt(0));
+  Register result = ToRegister(instr->result());
+
+  ASSERT(instr->hydrogen()->value()->representation().IsTagged());
+  __ testl(input, Immediate(kSmiTagMask));
+  NearLabel done, is_false;
+  __ j(zero, &is_false);
+  __ CmpObjectType(input, TestType(instr->hydrogen()), result);
+  __ j(NegateCondition(BranchCondition(instr->hydrogen())), &is_false);
+  __ LoadRoot(result, Heap::kTrueValueRootIndex);
+  __ jmp(&done);
+  __ bind(&is_false);
+  __ LoadRoot(result, Heap::kFalseValueRootIndex);
+  __ bind(&done);
 }
 
 
diff --git a/src/x64/lithium-x64.cc b/src/x64/lithium-x64.cc
index 2ed109d137..8db1ba9065 100644
--- a/src/x64/lithium-x64.cc
+++ b/src/x64/lithium-x64.cc
@@ -1502,8 +1502,10 @@ LInstruction* LChunkBuilder::DoIsSmi(HIsSmi* instr) {
 
 
 LInstruction* LChunkBuilder::DoHasInstanceType(HHasInstanceType* instr) {
-  Abort("Unimplemented: %s", "DoHasInstanceType");
-  return NULL;
+  ASSERT(instr->value()->representation().IsTagged());
+  LOperand* value = UseRegisterAtStart(instr->value());
+
+  return DefineAsRegister(new LHasInstanceType(value));
 }