[turbofan] Add the RoundInt32ToFloat32 operator to turbofan.

src/compiler/ia32/instruction-scheduler-ia32.cc

 // Copyright 2015 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/compiler/instruction-scheduler.h"
 
 namespace v8 {
 namespace internal {
 namespace compiler {
 
@@ skipping 45 matching lines @@
     case kSSEFloat64Max:
     case kSSEFloat64Min:
     case kSSEFloat64Abs:
     case kSSEFloat64Neg:
     case kSSEFloat64Sqrt:
     case kSSEFloat64Round:
     case kSSEFloat32ToFloat64:
     case kSSEFloat64ToFloat32:
     case kSSEFloat64ToInt32:
     case kSSEFloat64ToUint32:
+    case kSSEInt32ToFloat32:
     case kSSEInt32ToFloat64:
     case kSSEUint32ToFloat64:
     case kSSEFloat64ExtractLowWord32:
     case kSSEFloat64ExtractHighWord32:
     case kSSEFloat64InsertLowWord32:
     case kSSEFloat64InsertHighWord32:
     case kSSEFloat64LoadLowWord32:
     case kAVXFloat32Add:
     case kAVXFloat32Sub:
     case kAVXFloat32Mul:
@@ skipping 50 matching lines @@
 
 
 int InstructionScheduler::GetInstructionLatency(const Instruction* instr) {
   // TODO(all): Add instruction cost modeling.
   return 1;
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8