[turbofan] Rename floating point register / slot methods.

src/machine-type.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_MACHINE_TYPE_H_
 #define V8_MACHINE_TYPE_H_
 
 #include <iosfwd>
 
 #include "src/base/bits.h"
@@ skipping 159 matching lines @@
   return static_cast<size_t>(type.representation()) +
          static_cast<size_t>(type.semantic()) * 16;
 }
 
 std::ostream& operator<<(std::ostream& os, MachineRepresentation rep);
 std::ostream& operator<<(std::ostream& os, MachineSemantic type);
 std::ostream& operator<<(std::ostream& os, MachineType type);
 
 inline bool IsFloatingPoint(MachineRepresentation rep) {
   return rep == MachineRepresentation::kFloat32 ||
-         rep == MachineRepresentation::kFloat64;
+         rep == MachineRepresentation::kFloat64 ||
+         rep == MachineRepresentation::kSimd128;
 }
 
 // Gets the log2 of the element size in bytes of the machine type.
 inline int ElementSizeLog2Of(MachineRepresentation rep) {
   switch (rep) {
     case MachineRepresentation::kBit:
     case MachineRepresentation::kWord8:
       return 0;
     case MachineRepresentation::kWord16:
       return 1;
@@ skipping 13 matching lines @@
   UNREACHABLE();
   return -1;
 }
 
 typedef Signature<MachineType> MachineSignature;
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_MACHINE_TYPE_H_