MIPS: Improve Lsa/Dlsa implementations.

src/mips/assembler-mips.h

Index: src/mips/assembler-mips.h
diff --git a/src/mips/assembler-mips.h b/src/mips/assembler-mips.h
index 004165f64cc41157ef33529dbb5033a0da3db90a..f098bb4553a180d5e6c37cd5d3c8f86f43f8a2e1 100644
--- a/src/mips/assembler-mips.h
+++ b/src/mips/assembler-mips.h
@@ -750,9 +750,6 @@ class Assembler : public AssemblerBase {
   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);
@@ -1154,6 +1151,9 @@ class Assembler : public AssemblerBase {
   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.