Implement x64 lithium instructions DoGlobalObject and DoSub

Review URL: http://codereview.chromium.org/6324011

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@6456 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/x64/lithium-codegen-x64.cc

@@ -608,7 +608,22 @@ void LCodeGen::DoShiftI(LShiftI* instr) {
 
 
 void LCodeGen::DoSubI(LSubI* instr) {
-  Abort("Unimplemented: %s", "DoSubI");
+  LOperand* left = instr->InputAt(0);
+  LOperand* right = instr->InputAt(1);
+  ASSERT(left->Equals(instr->result()));
+
+  if (right->IsConstantOperand()) {
+    __ subl(ToRegister(left),
+            Immediate(ToInteger32(LConstantOperand::cast(right))));
+  } else if (right->IsRegister()) {
+    __ subl(ToRegister(left), ToRegister(right));
+  } else {
+    __ subl(ToRegister(left), ToOperand(right));
+  }
+
+  if (instr->hydrogen()->CheckFlag(HValue::kCanOverflow)) {
+    DeoptimizeIf(overflow, instr->environment());
+  }
 }
 
 
@@ -1444,7 +1459,8 @@ void LCodeGen::DoPushArgument(LPushArgument* instr) {
 
 
 void LCodeGen::DoGlobalObject(LGlobalObject* instr) {
-  Abort("Unimplemented: %s", "DoGlobalObject");
+  Register result = ToRegister(instr->result());
+  __ movq(result, GlobalObjectOperand());
 }
 
 

src/x64/lithium-x64.cc

@@ -1033,8 +1033,7 @@ LInstruction* LChunkBuilder::DoPushArgument(HPushArgument* instr) {
 
 
 LInstruction* LChunkBuilder::DoGlobalObject(HGlobalObject* instr) {
-  Abort("Unimplemented: %s", "DoGlobalObject");
-  return NULL;
+  return DefineAsRegister(new LGlobalObject);
 }
 
 
@@ -1160,8 +1159,23 @@ LInstruction* LChunkBuilder::DoMul(HMul* instr) {
 
 
 LInstruction* LChunkBuilder::DoSub(HSub* instr) {
-  Abort("Unimplemented: %s", "DoSub");
-  return NULL;
+  if (instr->representation().IsInteger32()) {
+    ASSERT(instr->left()->representation().IsInteger32());
+    ASSERT(instr->right()->representation().IsInteger32());
+    LOperand* left = UseRegisterAtStart(instr->left());
+    LOperand* right = UseOrConstantAtStart(instr->right());
+    LSubI* sub = new LSubI(left, right);
+    LInstruction* result = DefineSameAsFirst(sub);
+    if (instr->CheckFlag(HValue::kCanOverflow)) {
+      result = AssignEnvironment(result);
+    }
+    return result;
+  } else if (instr->representation().IsDouble()) {
+    return DoArithmeticD(Token::SUB, instr);
+  } else {
+    ASSERT(instr->representation().IsTagged());
+    return DoArithmeticT(Token::SUB, instr);
+  }
 }