diff --git a/compiler/utils/x86/assembler_x86.h b/compiler/utils/x86/assembler_x86.h
index 655af9c..759a41e 100644
--- a/compiler/utils/x86/assembler_x86.h
+++ b/compiler/utils/x86/assembler_x86.h
@@ -330,11 +330,15 @@
   void movntl(const Address& dst, Register src);
 
   void bswapl(Register dst);
+
   void bsfl(Register dst, Register src);
   void bsfl(Register dst, const Address& src);
   void bsrl(Register dst, Register src);
   void bsrl(Register dst, const Address& src);
 
+  void popcntl(Register dst, Register src);
+  void popcntl(Register dst, const Address& src);
+
   void rorl(Register reg, const Immediate& imm);
   void rorl(Register operand, Register shifter);
   void roll(Register reg, const Immediate& imm);