[RegisterConfiguration] Streamline access to arch defaults, simplify Registers.

src/ppc/disasm-ppc.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.
 
 // A Disassembler object is used to disassemble a block of code instruction by
 // instruction. The default implementation of the NameConverter object can be
 // overriden to modify register names or to do symbol lookup on addresses.
 //
 // The example below will disassemble a block of code and print it to stdout.
 //
@@ skipping 21 matching lines @@
 
 #include "src/base/platform/platform.h"
 #include "src/disasm.h"
 #include "src/macro-assembler.h"
 #include "src/ppc/constants-ppc.h"
 
 
 namespace v8 {
 namespace internal {
 
+const auto GetRegConfig = RegisterConfiguration::Crankshaft;
 
 //------------------------------------------------------------------------------
 
 // Decoder decodes and disassembles instructions into an output buffer.
 // It uses the converter to convert register names and call destinations into
 // more informative description.
 class Decoder {
  public:
   Decoder(const disasm::NameConverter& converter, Vector<char> out_buffer)
       : converter_(converter), out_buffer_(out_buffer), out_buffer_pos_(0) {
@@ skipping 59 matching lines @@
 
 
 // Print the register name according to the active name converter.
 void Decoder::PrintRegister(int reg) {
   Print(converter_.NameOfCPURegister(reg));
 }
 
 
 // Print the double FP register name according to the active name converter.
 void Decoder::PrintDRegister(int reg) {
-  Print(DoubleRegister::from_code(reg).ToString());
+  Print(GetRegConfig()->GetDoubleRegisterName(reg));
 }
 
 
 // Print SoftwareInterrupt codes. Factoring this out reduces the complexity of
 // the FormatOption method.
 void Decoder::PrintSoftwareInterrupt(SoftwareInterruptCodes svc) {
   switch (svc) {
     case kCallRtRedirected:
       Print("call rt redirected");
       return;
@@ skipping 1273 matching lines @@
   return tmp_buffer_.start();
 }
 
 
 const char* NameConverter::NameOfConstant(byte* addr) const {
   return NameOfAddress(addr);
 }
 
 
 const char* NameConverter::NameOfCPURegister(int reg) const {
-  return v8::internal::Register::from_code(reg).ToString();
+  return v8::internal::GetRegConfig()->GetGeneralRegisterName(reg);
 }
 
 const char* NameConverter::NameOfByteCPURegister(int reg) const {
   UNREACHABLE();  // PPC does not have the concept of a byte register
   return "nobytereg";
 }
 
 
 const char* NameConverter::NameOfXMMRegister(int reg) const {
   UNREACHABLE();  // PPC does not have any XMM registers
@@ skipping 37 matching lines @@
     pc += d.InstructionDecode(buffer, pc);
     v8::internal::PrintF(f, "%p    %08x      %s\n", static_cast<void*>(prev_pc),
                          *reinterpret_cast<int32_t*>(prev_pc), buffer.start());
   }
 }
 
 
 }  // namespace disasm
 
 #endif  // V8_TARGET_ARCH_PPC