[arm] [arm64] Add optional operators Float32Neg and Float64Neg.

src/compiler/machine-operator.h

Index: src/compiler/machine-operator.h
diff --git a/src/compiler/machine-operator.h b/src/compiler/machine-operator.h
index 8f95a89af3bdf5c0715c8dd8c43f95908ec8899d..211d17d6312102153ceb04d3756410350a102931 100644
--- a/src/compiler/machine-operator.h
+++ b/src/compiler/machine-operator.h
@@ -113,13 +113,15 @@ class MachineOperatorBuilder final : public ZoneObject {
     kWord64Popcnt = 1u << 19,
     kWord32ReverseBits = 1u << 20,
     kWord64ReverseBits = 1u << 21,
-    kAllOptionalOps = kFloat32Max | kFloat32Min | kFloat64Max | kFloat64Min |
-                      kFloat32RoundDown | kFloat64RoundDown | kFloat32RoundUp |
-                      kFloat64RoundUp | kFloat32RoundTruncate |
-                      kFloat64RoundTruncate | kFloat64RoundTiesAway |
-                      kFloat32RoundTiesEven | kFloat64RoundTiesEven |
-                      kWord32Ctz | kWord64Ctz | kWord32Popcnt | kWord64Popcnt |
-                      kWord32ReverseBits | kWord64ReverseBits
+    kFloat32Neg = 1u << 22,
+    kFloat64Neg = 1u << 23,
+    kAllOptionalOps =
+        kFloat32Max | kFloat32Min | kFloat64Max | kFloat64Min |
+        kFloat32RoundDown | kFloat64RoundDown | kFloat32RoundUp |
+        kFloat64RoundUp | kFloat32RoundTruncate | kFloat64RoundTruncate |
+        kFloat64RoundTiesAway | kFloat32RoundTiesEven | kFloat64RoundTiesEven |
+        kWord32Ctz | kWord64Ctz | kWord32Popcnt | kWord64Popcnt |
+        kWord32ReverseBits | kWord64ReverseBits | kFloat32Neg | kFloat64Neg
   };
   typedef base::Flags<Flag, unsigned> Flags;
 
@@ -361,6 +363,10 @@ class MachineOperatorBuilder final : public ZoneObject {
   const OptionalOperator Float32RoundTiesEven();
   const OptionalOperator Float64RoundTiesEven();
 
+  // Floating point neg.
+  const OptionalOperator Float32Neg();
+  const OptionalOperator Float64Neg();
+
   // Floating point bit representation.
   const Operator* Float64ExtractLowWord32();
   const Operator* Float64ExtractHighWord32();