[turbofan] Add backend support for float32.

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

Index: src/compiler/arm/instruction-selector-arm.cc
diff --git a/src/compiler/arm/instruction-selector-arm.cc b/src/compiler/arm/instruction-selector-arm.cc
index a37ebf21df963b2852cfe98599dddc5950f74834..18166347400a1122c30b116476710a54835f7378 100644
--- a/src/compiler/arm/instruction-selector-arm.cc
+++ b/src/compiler/arm/instruction-selector-arm.cc
@@ -49,10 +49,10 @@ class ArmOperandGenerator FINAL : public OperandGenerator {
       case kArmRsb:
         return ImmediateFitsAddrMode1Instruction(value);
 
-      case kArmVldr32:
-      case kArmVstr32:
-      case kArmVldr64:
-      case kArmVstr64:
+      case kArmVldrF32:
+      case kArmVstrF32:
+      case kArmVldrF64:
+      case kArmVstrF64:
         return value >= -1020 && value <= 1020 && (value % 4) == 0;
 
       case kArmLdrb:
@@ -90,6 +90,8 @@ class ArmOperandGenerator FINAL : public OperandGenerator {
       case kArmVdivF64:
       case kArmVmodF64:
       case kArmVnegF64:
+      case kArmVcvtF32F64:
+      case kArmVcvtF64F32:
       case kArmVcvtF64S32:
       case kArmVcvtF64U32:
       case kArmVcvtS32F64:
@@ -290,10 +292,10 @@ void InstructionSelector::VisitLoad(Node* node) {
   ArchOpcode opcode;
   switch (rep) {
     case kRepFloat32:
-      opcode = kArmVldr32;
+      opcode = kArmVldrF32;
       break;
     case kRepFloat64:
-      opcode = kArmVldr64;
+      opcode = kArmVldrF64;
       break;
     case kRepBit:  // Fall through.
     case kRepWord8:
@@ -345,10 +347,10 @@ void InstructionSelector::VisitStore(Node* node) {
   ArchOpcode opcode;
   switch (rep) {
     case kRepFloat32:
-      opcode = kArmVstr32;
+      opcode = kArmVstrF32;
       break;
     case kRepFloat64:
-      opcode = kArmVstr64;
+      opcode = kArmVstrF64;
       break;
     case kRepBit:  // Fall through.
     case kRepWord8:
@@ -682,6 +684,13 @@ void InstructionSelector::VisitInt32UMod(Node* node) {
 }
 
 
+void InstructionSelector::VisitChangeFloat32ToFloat64(Node* node) {
+  ArmOperandGenerator g(this);
+  Emit(kArmVcvtF64F32, g.DefineAsRegister(node),
+       g.UseRegister(node->InputAt(0)));
+}
+
+
 void InstructionSelector::VisitChangeInt32ToFloat64(Node* node) {
   ArmOperandGenerator g(this);
   Emit(kArmVcvtF64S32, g.DefineAsRegister(node),
@@ -710,6 +719,13 @@ void InstructionSelector::VisitChangeFloat64ToUint32(Node* node) {
 }
 
 
+void InstructionSelector::VisitTruncateFloat64ToFloat32(Node* node) {
+  ArmOperandGenerator g(this);
+  Emit(kArmVcvtF32F64, g.DefineAsRegister(node),
+       g.UseRegister(node->InputAt(0)));
+}
+
+
 void InstructionSelector::VisitFloat64Add(Node* node) {
   ArmOperandGenerator g(this);
   Int32BinopMatcher m(node);