s390x: implement vector support on s390

src/crankshaft/s390/lithium-s390.cc

 // Copyright 2014 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/s390/lithium-s390.h"
 
 #include <sstream>
 
 #include "src/crankshaft/hydrogen-osr.h"
 #include "src/crankshaft/lithium-inl.h"
@@ skipping 601 matching lines @@
     LOperand* right = UseFixedDouble(instr->right(), d2);
     LArithmeticD* result = new (zone()) LArithmeticD(op, left, right);
     // We call a C function for double modulo. It can't trigger a GC. We need
     // to use fixed result register for the call.
     // TODO(fschneider): Allow any register as input registers.
     return MarkAsCall(DefineFixedDouble(result, d1), instr);
   } else {
     LOperand* left = UseRegisterAtStart(instr->BetterLeftOperand());
     LOperand* right = UseRegisterAtStart(instr->BetterRightOperand());
     LArithmeticD* result = new (zone()) LArithmeticD(op, left, right);
-    return DefineSameAsFirst(result);
+    return CpuFeatures::IsSupported(VECTOR_FACILITY)
+               ? DefineAsRegister(result)
+               : DefineSameAsFirst(result);
   }
 }
 
 LInstruction* LChunkBuilder::DoArithmeticT(Token::Value op,
                                            HBinaryOperation* instr) {
   HValue* left = instr->left();
   HValue* right = instr->right();
   DCHECK(left->representation().IsTagged());
   DCHECK(right->representation().IsTagged());
   LOperand* context = UseFixed(instr->context(), cp);
@@ skipping 1512 matching lines @@
 LInstruction* LChunkBuilder::DoLoadFieldByIndex(HLoadFieldByIndex* instr) {
   LOperand* object = UseRegister(instr->object());
   LOperand* index = UseTempRegister(instr->index());
   LLoadFieldByIndex* load = new (zone()) LLoadFieldByIndex(object, index);
   LInstruction* result = DefineSameAsFirst(load);
   return AssignPointerMap(result);
 }
 
 }  // namespace internal
 }  // namespace v8