MIPS32: Improve integer division by constants

Change-Id: I2d1e84e84bdf8d3007cde7c51611ec893a0e9527
diff --git a/compiler/utils/mips/assembler_mips.h b/compiler/utils/mips/assembler_mips.h
index 1ef0992..013ad60 100644
--- a/compiler/utils/mips/assembler_mips.h
+++ b/compiler/utils/mips/assembler_mips.h
@@ -119,6 +119,7 @@
   void DivuR2(Register rd, Register rs, Register rt);  // R2
   void ModuR2(Register rd, Register rs, Register rt);  // R2
   void MulR6(Register rd, Register rs, Register rt);  // R6
+  void MuhR6(Register rd, Register rs, Register rt);  // R6
   void MuhuR6(Register rd, Register rs, Register rt);  // R6
   void DivR6(Register rd, Register rs, Register rt);  // R6
   void ModR6(Register rd, Register rs, Register rt);  // R6