[turbofan] Add backend support for float32.

src/compiler/ia32/instruction-selector-ia32.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/compiler/instruction-selector-impl.h"
 #include "src/compiler/node-matchers.h"
 #include "src/compiler/node-properties-inl.h"
 
 namespace v8 {
 namespace internal {
@@ skipping 336 matching lines @@
 void InstructionSelector::VisitInt32Mod(Node* node) {
   VisitMod(this, node, kIA32Idiv);
 }
 
 
 void InstructionSelector::VisitInt32UMod(Node* node) {
   VisitMod(this, node, kIA32Udiv);
 }
 
 
+void InstructionSelector::VisitChangeFloat32ToFloat64(Node* node) {
+  IA32OperandGenerator g(this);
+  // TODO(turbofan): IA32 SSE conversions should take an operand.
+  Emit(kCvtss2sd, g.DefineAsRegister(node), g.UseRegister(node->InputAt(0)));
+}
+
+
 void InstructionSelector::VisitChangeInt32ToFloat64(Node* node) {
   IA32OperandGenerator g(this);
   Emit(kSSEInt32ToFloat64, g.DefineAsRegister(node), g.Use(node->InputAt(0)));
 }
 
 
 void InstructionSelector::VisitChangeUint32ToFloat64(Node* node) {
   IA32OperandGenerator g(this);
   // TODO(turbofan): IA32 SSE LoadUint32() should take an operand.
   Emit(kSSEUint32ToFloat64, g.DefineAsRegister(node),
        g.UseRegister(node->InputAt(0)));
 }
 
 
 void InstructionSelector::VisitChangeFloat64ToInt32(Node* node) {
   IA32OperandGenerator g(this);
   Emit(kSSEFloat64ToInt32, g.DefineAsRegister(node), g.Use(node->InputAt(0)));
 }
 
 
 void InstructionSelector::VisitChangeFloat64ToUint32(Node* node) {
   IA32OperandGenerator g(this);
   Emit(kSSEFloat64ToUint32, g.DefineAsRegister(node), g.Use(node->InputAt(0)));
 }
 
 
+void InstructionSelector::VisitTruncateFloat64ToFloat32(Node* node) {
+  IA32OperandGenerator g(this);
+  // TODO(turbofan): IA32 SSE conversions should take an operand.
+  Emit(kCvtsd2ss, g.DefineAsRegister(node), g.UseRegister(node->InputAt(0)));
+}
+
+
 void InstructionSelector::VisitFloat64Add(Node* node) {
   IA32OperandGenerator g(this);
   Emit(kSSEFloat64Add, g.DefineSameAsFirst(node),
        g.UseRegister(node->InputAt(0)), g.UseRegister(node->InputAt(1)));
 }
 
 
 void InstructionSelector::VisitFloat64Sub(Node* node) {
   IA32OperandGenerator g(this);
   Emit(kSSEFloat64Sub, g.DefineSameAsFirst(node),
@@ skipping 155 matching lines @@
   call_instr->MarkAsCall();
   if (deoptimization != NULL) {
     DCHECK(continuation != NULL);
     call_instr->MarkAsControl();
   }
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8