[builtins] Introduce proper Float64Exp operator.

src/crankshaft/arm64/lithium-arm64.cc

 // Copyright 2013 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.
 
 #include "src/crankshaft/arm64/lithium-arm64.h"
 
 #include <sstream>
 
 #include "src/crankshaft/arm64/lithium-codegen-arm64.h"
 #include "src/crankshaft/hydrogen-osr.h"
@@ skipping 2444 matching lines @@
       } else {
         LOperand* input = UseRegisterAtStart(instr->value());
         LInstruction* result = DefineAsRegister(new(zone()) LMathAbs(input));
         if (!r.IsDouble()) result = AssignEnvironment(result);
         return result;
       }
     }
     case kMathExp: {
       DCHECK(instr->representation().IsDouble());
       DCHECK(instr->value()->representation().IsDouble());
-      LOperand* input = UseRegister(instr->value());
-      LOperand* double_temp1 = TempDoubleRegister();
-      LOperand* temp1 = TempRegister();
-      LOperand* temp2 = TempRegister();
-      LOperand* temp3 = TempRegister();
-      LMathExp* result = new(zone()) LMathExp(input, double_temp1,
-                                              temp1, temp2, temp3);
-      return DefineAsRegister(result);
+      LOperand* input = UseFixedDouble(instr->value(), d0);
+      LMathExp* result = new (zone()) LMathExp(input);
+      return MarkAsCall(DefineFixedDouble(result, d0), instr);
     }
     case kMathFloor: {
       DCHECK(instr->value()->representation().IsDouble());
       LOperand* input = UseRegisterAtStart(instr->value());
       if (instr->representation().IsInteger32()) {
         LMathFloorI* result = new(zone()) LMathFloorI(input);
         return AssignEnvironment(AssignPointerMap(DefineAsRegister(result)));
       } else {
         DCHECK(instr->representation().IsDouble());
         LMathFloorD* result = new(zone()) LMathFloorD(input);
@@ skipping 110 matching lines @@
 
 LInstruction* LChunkBuilder::DoWrapReceiver(HWrapReceiver* instr) {
   LOperand* receiver = UseRegister(instr->receiver());
   LOperand* function = UseRegister(instr->function());
   LWrapReceiver* result = new(zone()) LWrapReceiver(receiver, function);
   return AssignEnvironment(DefineAsRegister(result));
 }
 
 }  // namespace internal
 }  // namespace v8