[Turbofan] Add Simd128 registers to RegisterConfiguration.

src/s390/assembler-s390.h

 // Copyright (c) 1994-2006 Sun Microsystems Inc.
 // All Rights Reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions
 // are met:
 //
 // - Redistributions of source code must retain the above copyright notice,
 // this list of conditions and the following disclaimer.
 //
@@ skipping 73 matching lines @@
 
 #define ALLOCATABLE_GENERAL_REGISTERS(V)                  \
   V(r2)  V(r3)  V(r4)  V(r5)  V(r6)  V(r7)                \
   V(r8)  V(r9)  V(r13)
 
 #define DOUBLE_REGISTERS(V)                               \
   V(d0)  V(d1)  V(d2)  V(d3)  V(d4)  V(d5)  V(d6)  V(d7)  \
   V(d8)  V(d9)  V(d10) V(d11) V(d12) V(d13) V(d14) V(d15)
 
 #define FLOAT_REGISTERS DOUBLE_REGISTERS
+#define SIMD128_REGISTERS DOUBLE_REGISTERS
 
 #define ALLOCATABLE_DOUBLE_REGISTERS(V)                   \
   V(d1)  V(d2)  V(d3)  V(d4)  V(d5)  V(d6)  V(d7)         \
   V(d8)  V(d9)  V(d10) V(d11) V(d12) V(d15) V(d0)
 // clang-format on
 
 // CPU Registers.
 //
 // 1) We would prefer to use an enum, but enum values are assignment-
 // compatible with int, which has caused code-generation bugs.
@@ skipping 1345 matching lines @@
 
 class EnsureSpace BASE_EMBEDDED {
  public:
   explicit EnsureSpace(Assembler* assembler) { assembler->CheckBuffer(); }
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_S390_ASSEMBLER_S390_H_