[turbofan] Add new Float32Abs and Float64Abs operators.

src/compiler/x64/instruction-selector-x64.cc

Index: src/compiler/x64/instruction-selector-x64.cc
diff --git a/src/compiler/x64/instruction-selector-x64.cc b/src/compiler/x64/instruction-selector-x64.cc
index 82829a88352e8eb5db3e99af5ae5df4077d074ce..fea4e3f6235a8c7e88a62c9ae688669300cfae91 100644
--- a/src/compiler/x64/instruction-selector-x64.cc
+++ b/src/compiler/x64/instruction-selector-x64.cc
@@ -889,6 +889,12 @@ void InstructionSelector::VisitFloat32Min(Node* node) {
 }
 
 
+void InstructionSelector::VisitFloat32Abs(Node* node) {
+  X64OperandGenerator g(this);
+  Emit(kSSEFloat32Abs, g.DefineSameAsFirst(node), g.Use(node->InputAt(0)));
+}
+
+
 void InstructionSelector::VisitFloat32Sqrt(Node* node) {
   X64OperandGenerator g(this);
   Emit(kSSEFloat32Sqrt, g.DefineAsRegister(node), g.Use(node->InputAt(0)));
@@ -953,6 +959,12 @@ void InstructionSelector::VisitFloat64Min(Node* node) {
 }
 
 
+void InstructionSelector::VisitFloat64Abs(Node* node) {
+  X64OperandGenerator g(this);
+  Emit(kSSEFloat64Abs, g.DefineSameAsFirst(node), g.Use(node->InputAt(0)));
+}
+
+
 void InstructionSelector::VisitFloat64Sqrt(Node* node) {
   X64OperandGenerator g(this);
   Emit(kSSEFloat64Sqrt, g.DefineAsRegister(node), g.Use(node->InputAt(0)));
@@ -1508,8 +1520,10 @@ void InstructionSelector::VisitFloat64InsertHighWord32(Node* node) {
 MachineOperatorBuilder::Flags
 InstructionSelector::SupportedMachineOperatorFlags() {
   MachineOperatorBuilder::Flags flags =
+      MachineOperatorBuilder::kFloat32Abs |
       MachineOperatorBuilder::kFloat32Max |
       MachineOperatorBuilder::kFloat32Min |
+      MachineOperatorBuilder::kFloat64Abs |
       MachineOperatorBuilder::kFloat64Max |
       MachineOperatorBuilder::kFloat64Min |
       MachineOperatorBuilder::kWord32ShiftIsSafe;