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

src/mips64/macro-assembler-mips64.cc

Index: src/mips64/macro-assembler-mips64.cc
diff --git a/src/mips64/macro-assembler-mips64.cc b/src/mips64/macro-assembler-mips64.cc
index a1d9c41a561f9156cfc484c4278b0ebe8d7fd64c..a5e048a28a5e7c59ca4d70aae51b95855e99a5b0 100644
--- a/src/mips64/macro-assembler-mips64.cc
+++ b/src/mips64/macro-assembler-mips64.cc
@@ -1481,6 +1481,22 @@ void MacroAssembler::Dext(Register rt, Register rs, uint16_t pos,
 }
 
 
+void MacroAssembler::Dextm(Register rt, Register rs, uint16_t pos,
+                           uint16_t size) {
+  DCHECK(pos < 32);
+  DCHECK(size <= 64);
+  dextm(rt, rs, pos, size);
+}
+
+
+void MacroAssembler::Dextu(Register rt, Register rs, uint16_t pos,
+                           uint16_t size) {
+  DCHECK(pos >= 32 && pos < 64);
+  DCHECK(size < 33);
+  dextu(rt, rs, pos, size);
+}
+
+
 void MacroAssembler::Dins(Register rt, Register rs, uint16_t pos,
                           uint16_t size) {
   DCHECK(pos < 32);