MIPS: [turbofan] Improve matching for And(Shr(x, imm), mask).

src/mips64/assembler-mips64.h

Index: src/mips64/assembler-mips64.h
diff --git a/src/mips64/assembler-mips64.h b/src/mips64/assembler-mips64.h
index 093daaf8656de252e583988453345e7eccebbd4d..897e9a17fd2d3c664f38782aca1c0133fc11cc7d 100644
--- a/src/mips64/assembler-mips64.h
+++ b/src/mips64/assembler-mips64.h
@@ -865,6 +865,8 @@ class Assembler : public AssemblerBase {
   void ins_(Register rt, Register rs, uint16_t pos, uint16_t size);
   void ext_(Register rt, Register rs, uint16_t pos, uint16_t size);
   void dext_(Register rt, Register rs, uint16_t pos, uint16_t size);
+  void dextm(Register rt, Register rs, uint16_t pos, uint16_t size);
+  void dextu(Register rt, Register rs, uint16_t pos, uint16_t size);
   void dins_(Register rt, Register rs, uint16_t pos, uint16_t size);
   void bitswap(Register rd, Register rt);
   void dbitswap(Register rd, Register rt);