[x64][ia32] Add Support for the Float64Neg and Float32Neg turbofan 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 7315b22beab771571284b2acd99454ec56eb32ca..4d9622ad14739a8c1c091e12b5772d60915ee6a1 100644
--- a/src/compiler/x64/instruction-selector-x64.cc
+++ b/src/compiler/x64/instruction-selector-x64.cc
@@ -1455,9 +1455,13 @@ void InstructionSelector::VisitFloat64RoundTiesEven(Node* node) {
   VisitRR(this, node, kSSEFloat64Round | MiscField::encode(kRoundToNearest));
 }
 
-void InstructionSelector::VisitFloat32Neg(Node* node) { UNREACHABLE(); }
+void InstructionSelector::VisitFloat32Neg(Node* node) {
+  VisitFloatUnop(this, node, node->InputAt(0), kAVXFloat32Neg, kSSEFloat32Neg);
+}
 
-void InstructionSelector::VisitFloat64Neg(Node* node) { UNREACHABLE(); }
+void InstructionSelector::VisitFloat64Neg(Node* node) {
+  VisitFloatUnop(this, node, node->InputAt(0), kAVXFloat64Neg, kSSEFloat64Neg);
+}
 
 void InstructionSelector::VisitFloat64Ieee754Binop(Node* node,
                                                    InstructionCode opcode) {
@@ -2182,7 +2186,8 @@ MachineOperatorBuilder::Flags
 InstructionSelector::SupportedMachineOperatorFlags() {
   MachineOperatorBuilder::Flags flags =
       MachineOperatorBuilder::kWord32ShiftIsSafe |
-      MachineOperatorBuilder::kWord32Ctz | MachineOperatorBuilder::kWord64Ctz;
+      MachineOperatorBuilder::kWord32Ctz | MachineOperatorBuilder::kWord64Ctz |
+      MachineOperatorBuilder::kFloat32Neg | MachineOperatorBuilder::kFloat64Neg;
   if (CpuFeatures::IsSupported(POPCNT)) {
     flags |= MachineOperatorBuilder::kWord32Popcnt |
              MachineOperatorBuilder::kWord64Popcnt;