[turbofan] Add backend support for float32.

src/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 <list>
 
 #include "src/compiler/instruction-selector-unittest.h"
 
 namespace v8 {
 namespace internal {
@@ skipping 179 matching lines @@
 };
 
 
 std::ostream& operator<<(std::ostream& os, const Conversion& conv) {
   return os << conv.mi;
 }
 
 
 // ARM64 type conversion instructions.
 static const Conversion kConversionInstructions[] = {
+    {{&RawMachineAssembler::ChangeFloat32ToFloat64, "ChangeFloat32ToFloat64",
+      kArm64Float32ToFloat64, kMachFloat64},
+     kMachFloat32},
+    {{&RawMachineAssembler::TruncateFloat64ToFloat32,
+      "TruncateFloat64ToFloat32", kArm64Float64ToFloat32, kMachFloat32},
+     kMachFloat64},
     {{&RawMachineAssembler::ChangeInt32ToInt64, "ChangeInt32ToInt64",
       kArm64Sxtw, kMachInt64},
      kMachInt32},
     {{&RawMachineAssembler::ChangeUint32ToUint64, "ChangeUint32ToUint64",
       kArm64Mov32, kMachUint64},
      kMachUint32},
     {{&RawMachineAssembler::TruncateInt64ToInt32, "TruncateInt64ToInt32",
       kArm64Mov32, kMachInt32},
      kMachInt64},
     {{&RawMachineAssembler::ChangeInt32ToFloat64, "ChangeInt32ToFloat64",
@@ skipping 902 matching lines @@
     EXPECT_EQ(s.ToVreg(s[0]->InputAt(0)), s.ToVreg(s[0]->InputAt(1)));
     EXPECT_EQ(1U, s[0]->OutputCount());
     EXPECT_EQ(kFlags_set, s[0]->flags_mode());
     EXPECT_EQ(kEqual, s[0]->flags_condition());
   }
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8