MIPS64: Use the Lsa() and Dlsa() macro/r6 instructions in existing code.

src/mips64/codegen-mips64.cc

 // Copyright 2012 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.
 
 #include "src/mips64/codegen-mips64.h"
 
 #if V8_TARGET_ARCH_MIPS64
 
 #include "src/codegen.h"
 #include "src/macro-assembler.h"
@@ skipping 1060 matching lines @@
   __ And(at, result, Operand(kShortExternalStringMask));
   __ Branch(call_runtime, ne, at, Operand(zero_reg));
   __ ld(string, FieldMemOperand(string, ExternalString::kResourceDataOffset));
 
   Label one_byte, done;
   __ bind(&check_encoding);
   STATIC_ASSERT(kTwoByteStringTag == 0);
   __ And(at, result, Operand(kStringEncodingMask));
   __ Branch(&one_byte, ne, at, Operand(zero_reg));
   // Two-byte string.
-  __ dsll(at, index, 1);
-  __ Daddu(at, string, at);
+  __ Dlsa(at, string, index, 1);
   __ lhu(result, MemOperand(at));
   __ jmp(&done);
   __ bind(&one_byte);
   // One_byte string.
   __ Daddu(at, string, index);
   __ lbu(result, MemOperand(at));
   __ bind(&done);
 }
 
 
@@ skipping 51 matching lines @@
   DCHECK(*reinterpret_cast<double*>
          (ExternalReference::math_exp_constants(8).address()) == 1);
   __ Move(double_scratch2, 1.);
   __ add_d(result, result, double_scratch2);
   __ dsrl(temp1, temp2, 11);
   __ Ext(temp2, temp2, 0, 11);
   __ Daddu(temp1, temp1, Operand(0x3ff));
 
   // Must not call ExpConstant() after overwriting temp3!
   __ li(temp3, Operand(ExternalReference::math_exp_log_table()));
-  __ dsll(at, temp2, 3);
-  __ Daddu(temp3, temp3, Operand(at));
+  __ Dlsa(temp3, temp3, temp2, 3);
   __ lwu(temp2, MemOperand(temp3, Register::kMantissaOffset));
   __ lwu(temp3, MemOperand(temp3, Register::kExponentOffset));
   // The first word is loaded is the lower number register.
   if (temp2.code() < temp3.code()) {
     __ dsll(at, temp1, 20);
     __ Or(temp1, temp3, at);
     __ Move(double_scratch1, temp2, temp1);
   } else {
     __ dsll(at, temp1, 20);
     __ Or(temp1, temp2, at);
@@ skipping 94 matching lines @@
   }
 }
 
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_MIPS64