Refactor MathPowHalf on ia32.

src/ia32/lithium-ia32.cc

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 280 matching lines @@
   stream->Add("#%d / ", arity());
 }
 
 
 void LUnaryMathOperation::PrintDataTo(StringStream* stream) {
   stream->Add("/%s ", hydrogen()->OpName());
   InputAt(0)->PrintTo(stream);
 }
 
 
+void LMathPowHalf::PrintDataTo(StringStream* stream) {
+  stream->Add("/pow_half ");
+  InputAt(0)->PrintTo(stream);
+}
+
+
 void LLoadContextSlot::PrintDataTo(StringStream* stream) {
   InputAt(0)->PrintTo(stream);
   stream->Add("[%d]", slot_index());
 }
 
 
 void LStoreContextSlot::PrintDataTo(StringStream* stream) {
   InputAt(0)->PrintTo(stream);
   stream->Add("[%d] <- ", slot_index());
   InputAt(1)->PrintTo(stream);
@@ skipping 866 matching lines @@
     return DefineSameAsFirst(result);
   } else if (op == kMathSin || op == kMathCos) {
     LOperand* context = UseFixed(instr->context(), esi);
     LOperand* input = UseFixedDouble(instr->value(), xmm1);
     LUnaryMathOperation* result = new(zone()) LUnaryMathOperation(context,
                                                                   input);
     return MarkAsCall(DefineFixedDouble(result, xmm1), instr);
   } else {
     LOperand* input = UseRegisterAtStart(instr->value());
     LOperand* context = UseAny(instr->context());  // Deferred use by MathAbs.
+    if (op == kMathPowHalf) {
+      LOperand* temp = TempRegister();
+      LMathPowHalf* result = new(zone()) LMathPowHalf(context, input, temp);
+      return DefineSameAsFirst(result);
+    }
     LUnaryMathOperation* result = new(zone()) LUnaryMathOperation(context,
                                                                   input);
     switch (op) {
       case kMathAbs:
         return AssignEnvironment(AssignPointerMap(DefineSameAsFirst(result)));
       case kMathFloor:
         return AssignEnvironment(DefineAsRegister(result));
       case kMathRound:
         return AssignEnvironment(DefineAsRegister(result));
       case kMathSqrt:
         return DefineSameAsFirst(result);
-      case kMathPowHalf:
-        return DefineSameAsFirst(result);
       default:
         UNREACHABLE();
         return NULL;
     }
   }
 }
 
 
 LInstruction* LChunkBuilder::DoCallKeyed(HCallKeyed* instr) {
   ASSERT(instr->key()->representation().IsTagged());
@@ skipping 1155 matching lines @@
   LOperand* key = UseOrConstantAtStart(instr->key());
   LOperand* object = UseOrConstantAtStart(instr->object());
   LIn* result = new(zone()) LIn(context, key, object);
   return MarkAsCall(DefineFixed(result, eax), instr);
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_IA32