MIPS: [turbofan] use Lsa/Dlsa in some Multiplication cases.

src/compiler/mips64/code-generator-mips64.cc

Index: src/compiler/mips64/code-generator-mips64.cc
diff --git a/src/compiler/mips64/code-generator-mips64.cc b/src/compiler/mips64/code-generator-mips64.cc
index c6341b1210c45777635adc362ab853902aca4950..f77db12569ace6a849a70de3847e89c374ff38fb 100644
--- a/src/compiler/mips64/code-generator-mips64.cc
+++ b/src/compiler/mips64/code-generator-mips64.cc
@@ -775,6 +775,16 @@ void CodeGenerator::AssembleArchInstruction(Instruction* instr) {
     case kMips64DmodU:
       __ Dmodu(i.OutputRegister(), i.InputRegister(0), i.InputOperand(1));
       break;
+    case kMips64Dlsa:
+      DCHECK(instr->InputAt(2)->IsImmediate());
+      __ Dlsa(i.OutputRegister(), i.InputRegister(0), i.InputRegister(1),
+              i.InputInt8(2));
+      break;
+    case kMips64Lsa:
+      DCHECK(instr->InputAt(2)->IsImmediate());
+      __ Lsa(i.OutputRegister(), i.InputRegister(0), i.InputRegister(1),
+             i.InputInt8(2));
+      break;
     case kMips64And:
       __ And(i.OutputRegister(), i.InputRegister(0), i.InputOperand(1));
       break;