Revert of Remove register index/code indirection

src/arm/constants-arm.cc

 // Copyright 2009 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.
 
 #if V8_TARGET_ARCH_ARM
 
 #include "src/arm/constants-arm.h"
 
 
 namespace v8 {
@@ skipping 33 matching lines @@
   {10, "sl"},
   {11, "r11"},
   {12, "r12"},
   {13, "r13"},
   {14, "r14"},
   {15, "r15"},
   {kNoRegister, NULL}
 };
 
 
+const char* Registers::Name(int reg) {
+  const char* result;
+  if ((0 <= reg) && (reg < kNumRegisters)) {
+    result = names_[reg];
+  } else {
+    result = "noreg";
+  }
+  return result;
+}
+
+
 // Support for VFP registers s0 to s31 (d0 to d15) and d16-d31.
 // Note that "sN:sM" is the same as "dN/2" up to d15.
 // These register names are defined in a way to match the native disassembler
 // formatting. See for example the command "objdump -d <binary file>".
 const char* VFPRegisters::names_[kNumVFPRegisters] = {
     "s0", "s1", "s2", "s3", "s4", "s5", "s6", "s7",
     "s8", "s9", "s10", "s11", "s12", "s13", "s14", "s15",
     "s16", "s17", "s18", "s19", "s20", "s21", "s22", "s23",
     "s24", "s25", "s26", "s27", "s28", "s29", "s30", "s31",
     "d0", "d1", "d2", "d3", "d4", "d5", "d6", "d7",
@@ skipping 46 matching lines @@
 
   // No register with the requested name found.
   return kNoRegister;
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_ARM