Add the concept of FloatRegister for all platforms.

src/ppc/assembler-ppc.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 91 matching lines @@
   V(r16) V(r17) V(r18) V(r19) V(r20) V(r21) V(r22) V(r23) \
   V(r24) V(r25) V(r26) V(r27) V(r28) V(r30)
 #endif
 
 #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) \
   V(d16) V(d17) V(d18) V(d19) V(d20) V(d21) V(d22) V(d23) \
   V(d24) V(d25) V(d26) V(d27) V(d28) V(d29) V(d30) V(d31)
 
+#define FLOAT_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(d16) V(d17) V(d18) V(d19) V(d20) V(d21) V(d22) V(d23) \
   V(d24) V(d25) V(d26) V(d27) V(d28) V(d29) V(d30) V(d31)
 // clang-format on
 
 // CPU Registers.
 //
 // 1) We would prefer to use an enum, but enum values are assignment-
@@ skipping 109 matching lines @@
   }
 
   static DoubleRegister from_code(int code) {
     DoubleRegister r = {code};
     return r;
   }
 
   int reg_code;
 };
 
+typedef DoubleRegister FloatRegister;
+
+// TODO(ppc) Define SIMD registers.
+typedef DoubleRegister Simd128Register;
+
 #define DECLARE_REGISTER(R) \
   const DoubleRegister R = {DoubleRegister::kCode_##R};
 DOUBLE_REGISTERS(DECLARE_REGISTER)
 #undef DECLARE_REGISTER
 const Register no_dreg = {Register::kCode_no_reg};
 
 // Aliases for double registers.  Defined using #define instead of
 // "static const DoubleRegister&" because Clang complains otherwise when a
 // compilation unit that includes this header doesn't use the variables.
 #define kFirstCalleeSavedDoubleReg d14
@@ skipping 25 matching lines @@
 
 const CRegister cr0 = {0};
 const CRegister cr1 = {1};
 const CRegister cr2 = {2};
 const CRegister cr3 = {3};
 const CRegister cr4 = {4};
 const CRegister cr5 = {5};
 const CRegister cr6 = {6};
 const CRegister cr7 = {7};
 
-// TODO(ppc) Define SIMD registers.
-typedef DoubleRegister Simd128Register;
-
 // -----------------------------------------------------------------------------
 // Machine instruction Operands
 
 #if V8_TARGET_ARCH_PPC64
 const RelocInfo::Mode kRelocInfo_NONEPTR = RelocInfo::NONE64;
 #else
 const RelocInfo::Mode kRelocInfo_NONEPTR = RelocInfo::NONE32;
 #endif
 
 // Class Operand represents a shifter operand in data processing instructions
@@ skipping 1176 matching lines @@
 
 
 class EnsureSpace BASE_EMBEDDED {
  public:
   explicit EnsureSpace(Assembler* assembler) { assembler->CheckBuffer(); }
 };
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_PPC_ASSEMBLER_PPC_H_