A64: Implement HRandom.

src/a64/lithium-a64.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
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@@ skipping 1230 matching lines @@
     // it will be loaded multiple times. Unfortunatly crankshaft already
     // duplicates constant loads, but we should modify the code below once this
     // issue has been addressed in crankshaft.
     LOperand* left = UseRegisterOrConstantAtStart(instr->left());
     LOperand* right = UseRegisterOrConstantAtStart(instr->right());
     return new(zone()) LCmpIDAndBranch(left, right);
   }
 }
 
 
+LInstruction* LChunkBuilder::DoRandom(HRandom* instr) {
+  ASSERT(instr->representation().IsDouble());
+  ASSERT(instr->global_object()->representation().IsTagged());
+  LOperand* global_object = UseFixed(instr->global_object(), x0);
+  LRandom* result = new(zone()) LRandom(global_object);
+  return MarkAsCall(DefineFixedDouble(result, d7), instr);

[Rodolph Perfetta, 2014/01/23 15:02:14]

Use d0 to be consistent with other uses.

+}
+
+
 LInstruction* LChunkBuilder::DoCompareGeneric(HCompareGeneric* instr) {
   ASSERT(instr->left()->representation().IsTagged());
   ASSERT(instr->right()->representation().IsTagged());
   LOperand* left = UseFixed(instr->left(), x1);
   LOperand* right = UseFixed(instr->right(), x0);
   LCmpT* result = new(zone()) LCmpT(left, right);
   return MarkAsCall(DefineFixed(result, x0), instr);
 }
 
 
@@ skipping 605 matching lines @@
 }
 
 
 LInstruction* LChunkBuilder::DoPushArgument(HPushArgument* instr) {
   ++argument_count_;
   LOperand* argument = UseRegister(instr->argument());
   return new(zone()) LPushArgument(argument);
 }
 
 
-LInstruction* LChunkBuilder::DoRandom(HRandom* instr) {
-  UNIMPLEMENTED_INSTRUCTION();
-}
-
-
 LInstruction* LChunkBuilder::DoRegExpLiteral(HRegExpLiteral* instr) {
   return MarkAsCall(DefineFixed(new(zone()) LRegExpLiteral, x0), instr);
 }
 
 
 LInstruction* LChunkBuilder::DoReturn(HReturn* instr) {
   LOperand* parameter_count = UseRegisterOrConstant(instr->parameter_count());
   return new(zone()) LReturn(UseFixed(instr->value(), x0), parameter_count);
 }
 
@@ skipping 560 matching lines @@
 LInstruction* LChunkBuilder::DoWrapReceiver(HWrapReceiver* instr) {
   LOperand* receiver = UseRegister(instr->receiver());
   LOperand* function = UseRegisterAtStart(instr->function());
   LOperand* temp = TempRegister();
   LWrapReceiver* result = new(zone()) LWrapReceiver(receiver, function, temp);
   return AssignEnvironment(DefineAsRegister(result));
 }
 
 
 } }  // namespace v8::internal