Revert of Reland: Remove register index/code indirection

src/mips/assembler-mips-inl.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 66 matching lines @@
 Operand::Operand(Register rm) {
   rm_ = rm;
 }
 
 
 bool Operand::is_reg() const {
   return rm_.is_valid();
 }
 
 
+int Register::NumAllocatableRegisters() {
+    return kMaxNumAllocatableRegisters;
+}
+
+
+int DoubleRegister::NumRegisters() {
+    return FPURegister::kMaxNumRegisters;
+}
+
+
+int DoubleRegister::NumAllocatableRegisters() {
+    return FPURegister::kMaxNumAllocatableRegisters;
+}
+
+
+int DoubleRegister::NumAllocatableAliasedRegisters() {
+  return NumAllocatableRegisters();
+}
+
+
+int FPURegister::ToAllocationIndex(FPURegister reg) {
+  DCHECK(reg.code() % 2 == 0);
+  DCHECK(reg.code() / 2 < kMaxNumAllocatableRegisters);
+  DCHECK(reg.is_valid());
+  DCHECK(!reg.is(kDoubleRegZero));
+  DCHECK(!reg.is(kLithiumScratchDouble));
+  return (reg.code() / 2);
+}
+
+
 // -----------------------------------------------------------------------------
 // RelocInfo.
 
 void RelocInfo::apply(intptr_t delta) {
   if (IsCodeTarget(rmode_)) {
     uint32_t scope1 = (uint32_t) target_address() & ~kImm28Mask;
     uint32_t scope2 = reinterpret_cast<uint32_t>(pc_) & ~kImm28Mask;
 
     if (scope1 != scope2) {
       Assembler::JumpToJumpRegister(pc_);
@@ skipping 355 matching lines @@
   *reinterpret_cast<Instr*>(pc_) = x;
   pc_ += kInstrSize;
   CheckTrampolinePoolQuick();
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_MIPS_ASSEMBLER_MIPS_INL_H_