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

test/unittests/compiler/arm64/instruction-selector-arm64-unittest.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "test/unittests/compiler/instruction-selector-unittest.h"
 
 namespace v8 {
 namespace internal {
 namespace compiler {
 
@@ skipping 3556 matching lines @@
   // Float64Min is `(a < b) ? a : b`.
   ASSERT_EQ(1U, s.size());
   EXPECT_EQ(kArm64Float64Min, s[0]->arch_opcode());
   ASSERT_EQ(2U, s[0]->InputCount());
   EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
   EXPECT_EQ(s.ToVreg(p1), s.ToVreg(s[0]->InputAt(1)));
   ASSERT_EQ(1U, s[0]->OutputCount());
   EXPECT_EQ(s.ToVreg(n), s.ToVreg(s[0]->Output()));
 }
 
+TEST_F(InstructionSelectorTest, Float32Neg) {
+  StreamBuilder m(this, MachineType::Float32(), MachineType::Float32());
+  Node* const p0 = m.Parameter(0);
+  // Don't use m.Float32Neg() as that generates an explicit sub.
+  Node* const n = m.AddNode(m.machine()->Float32Neg().op(), m.Parameter(0));
+  m.Return(n);
+  Stream s = m.Build();
+  ASSERT_EQ(1U, s.size());
+  EXPECT_EQ(kArm64Float32Neg, s[0]->arch_opcode());
+  ASSERT_EQ(1U, s[0]->InputCount());
+  EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
+  ASSERT_EQ(1U, s[0]->OutputCount());
+  EXPECT_EQ(s.ToVreg(n), s.ToVreg(s[0]->Output()));
+}
+
+TEST_F(InstructionSelectorTest, Float64Neg) {
+  StreamBuilder m(this, MachineType::Float64(), MachineType::Float64());
+  Node* const p0 = m.Parameter(0);
+  // Don't use m.Float64Neg() as that generates an explicit sub.
+  Node* const n = m.AddNode(m.machine()->Float64Neg().op(), m.Parameter(0));
+  m.Return(n);
+  Stream s = m.Build();
+  ASSERT_EQ(1U, s.size());
+  EXPECT_EQ(kArm64Float64Neg, s[0]->arch_opcode());
+  ASSERT_EQ(1U, s[0]->InputCount());
+  EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
+  ASSERT_EQ(1U, s[0]->OutputCount());
+  EXPECT_EQ(s.ToVreg(n), s.ToVreg(s[0]->Output()));
+}
+
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8