[turbofan] Add new Float32Abs and Float64Abs operators.

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 8ec4dedd218e8c642d6a0689071b529e40fe39e1..f0040474f4a6ae416d08c1615fbf8e8aee2e8c26 100644
--- a/src/compiler/arm/instruction-selector-arm.cc
+++ b/src/compiler/arm/instruction-selector-arm.cc
@@ -1044,6 +1044,16 @@ void InstructionSelector::VisitFloat32Min(Node* node) { UNREACHABLE(); }
 void InstructionSelector::VisitFloat64Min(Node* node) { UNREACHABLE(); }
 
 
+void InstructionSelector::VisitFloat32Abs(Node* node) {
+  VisitRR(this, kArmVabsF32, node);
+}
+
+
+void InstructionSelector::VisitFloat64Abs(Node* node) {
+  VisitRR(this, kArmVabsF64, node);
+}
+
+
 void InstructionSelector::VisitFloat32Sqrt(Node* node) {
   VisitRR(this, kArmVsqrtF32, node);
 }
@@ -1502,6 +1512,8 @@ void InstructionSelector::VisitFloat64InsertHighWord32(Node* node) {
 MachineOperatorBuilder::Flags
 InstructionSelector::SupportedMachineOperatorFlags() {
   MachineOperatorBuilder::Flags flags =
+      MachineOperatorBuilder::kFloat32Abs |
+      MachineOperatorBuilder::kFloat64Abs |
       MachineOperatorBuilder::kInt32DivIsSafe |
       MachineOperatorBuilder::kUint32DivIsSafe;