MIPS: Improve Lsa/Dlsa implementations.

src/mips/assembler-mips.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 732 matching lines @@
   // doesn't happen.
   void sll(Register rd, Register rt, uint16_t sa, bool coming_from_nop = false);
   void sllv(Register rd, Register rt, Register rs);
   void srl(Register rd, Register rt, uint16_t sa);
   void srlv(Register rd, Register rt, Register rs);
   void sra(Register rt, Register rd, uint16_t sa);
   void srav(Register rt, Register rd, Register rs);
   void rotr(Register rd, Register rt, uint16_t sa);
   void rotrv(Register rd, Register rt, Register rs);
 
-  // Address computing instructions with shift.
-  void lsa(Register rd, Register rt, Register rs, uint8_t sa);
-
   // ------------Memory-instructions-------------
 
   void lb(Register rd, const MemOperand& rs);
   void lbu(Register rd, const MemOperand& rs);
   void lh(Register rd, const MemOperand& rs);
   void lhu(Register rd, const MemOperand& rs);
   void lw(Register rd, const MemOperand& rs);
   void lwl(Register rd, const MemOperand& rs);
   void lwr(Register rd, const MemOperand& rs);
   void sb(Register rd, const MemOperand& rs);
@@ skipping 381 matching lines @@
   void PatchConstantPoolAccessInstruction(int pc_offset, int offset,
                                           ConstantPoolEntry::Access access,
                                           ConstantPoolEntry::Type type) {
     // No embedded constant pool support.
     UNREACHABLE();
   }
 
   bool IsPrevInstrCompactBranch() { return prev_instr_compact_branch_; }
 
  protected:
+  // Load Scaled Address instruction.
+  void lsa(Register rd, Register rt, Register rs, uint8_t sa);
+
   // Relocation for a type-recording IC has the AST id added to it.  This
   // member variable is a way to pass the information from the call site to
   // the relocation info.
   TypeFeedbackId recorded_ast_id_;
 
   int32_t buffer_space() const { return reloc_info_writer.pos() - pc_; }
 
   // Decode branch instruction at pos and return branch target pos.
   int target_at(int pos, bool is_internal);
 
@@ skipping 286 matching lines @@
  public:
   explicit EnsureSpace(Assembler* assembler) {
     assembler->CheckBuffer();
   }
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_ARM_ASSEMBLER_MIPS_H_