MIPS: Enable logical shift right and bitwise And matching to Ext, Dext.

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

Index: src/compiler/mips/code-generator-mips.cc
diff --git a/src/compiler/mips/code-generator-mips.cc b/src/compiler/mips/code-generator-mips.cc
index efdeb6415dfa2bffeaa845ccb0f78e31d02f8282..2b7ff10a5ca306de7bc988301c70e387dbe52858 100644
--- a/src/compiler/mips/code-generator-mips.cc
+++ b/src/compiler/mips/code-generator-mips.cc
@@ -663,6 +663,10 @@ void CodeGenerator::AssembleArchInstruction(Instruction* instr) {
         __ sra(i.OutputRegister(), i.InputRegister(0), imm);
       }
       break;
+    case kMipsExt:
+      __ Ext(i.OutputRegister(), i.InputRegister(0), i.InputInt8(1),
+             i.InputInt8(2));
+      break;
     case kMipsRor:
       __ Ror(i.OutputRegister(), i.InputRegister(0), i.InputOperand(1));
       break;