[turbofan] Add backend support for float32.

src/compiler/arm64/instruction-codes-arm64.h

 // 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.
 
 #ifndef V8_COMPILER_ARM64_INSTRUCTION_CODES_ARM64_H_
 #define V8_COMPILER_ARM64_INSTRUCTION_CODES_ARM64_H_
 
 namespace v8 {
 namespace internal {
 namespace compiler {
@@ skipping 45 matching lines @@
   V(Arm64Poke)                     \
   V(Arm64PokePairZero)             \
   V(Arm64PokePair)                 \
   V(Arm64Float64Cmp)               \
   V(Arm64Float64Add)               \
   V(Arm64Float64Sub)               \
   V(Arm64Float64Mul)               \
   V(Arm64Float64Div)               \
   V(Arm64Float64Mod)               \
   V(Arm64Float64Sqrt)              \
+  V(Arm64Float32ToFloat64)         \
+  V(Arm64Float64ToFloat32)         \
   V(Arm64Float64ToInt32)           \
   V(Arm64Float64ToUint32)          \
   V(Arm64Int32ToFloat64)           \
   V(Arm64Uint32ToFloat64)          \
   V(Arm64LdrS)                     \
   V(Arm64StrS)                     \
   V(Arm64LdrD)                     \
   V(Arm64StrD)                     \
   V(Arm64Ldrb)                     \
   V(Arm64Ldrsb)                    \
@@ skipping 23 matching lines @@
 // MRR = [register + register]
 #define TARGET_ADDRESSING_MODE_LIST(V) \
   V(MRI) /* [%r0 + K] */               \
   V(MRR) /* [%r0 + %r1] */
 
 }  // namespace internal
 }  // namespace compiler
 }  // namespace v8
 
 #endif  // V8_COMPILER_ARM64_INSTRUCTION_CODES_ARM64_H_