WIP: Add first-class support for float32 representations.

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

Index: src/compiler/ia32/instruction-selector-ia32.cc
diff --git a/src/compiler/ia32/instruction-selector-ia32.cc b/src/compiler/ia32/instruction-selector-ia32.cc
index 42702c172305b9e8e494b2bd00b87bfa5cd66244..2d53bf96f7c4d0203ca1648e3d7b50c99537dfa7 100644
--- a/src/compiler/ia32/instruction-selector-ia32.cc
+++ b/src/compiler/ia32/instruction-selector-ia32.cc
@@ -354,6 +354,22 @@ void InstructionSelector::VisitInt32UMod(Node* node) {
 }
 
 
+void InstructionSelector::VisitChangeFloat32ToFloat64(Node* node) {
+  IA32OperandGenerator g(this);
+  // TODO(turbofan): IA32 SSE conversions should take an operand.
+  Emit(kSSEFloat32ToFloat64, g.DefineAsRegister(node),
+       g.UseRegister(node->InputAt(0)));
+}
+
+
+void InstructionSelector::VisitChangeFloat64ToFloat32(Node* node) {
+  IA32OperandGenerator g(this);
+  // TODO(turbofan): IA32 SSE conversions should take an operand.
+  Emit(kSSEFloat64ToFloat32, 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)));
@@ -417,6 +433,12 @@ void InstructionSelector::VisitFloat64Mod(Node* node) {
 }
 
 
+void InstructionSelector::VisitTruncateFloat64ToFloat32(Node* node) {
+  IA32OperandGenerator g(this);
+  Emit(kSSEFloat64ToFloat32, g.DefineAsRegister(node), g.Use(node->InputAt(0)));
+}
+
+
 void InstructionSelector::VisitInt32AddWithOverflow(Node* node,
                                                     FlagsContinuation* cont) {
   VisitBinop(this, node, kIA32Add, cont);