diff --git a/compiler/utils/x86/assembler_x86.h b/compiler/utils/x86/assembler_x86.h
index b87522a..a747cda 100644
--- a/compiler/utils/x86/assembler_x86.h
+++ b/compiler/utils/x86/assembler_x86.h
@@ -503,6 +503,11 @@
   void pcmpeqd(XmmRegister dst, XmmRegister src);
   void pcmpeqq(XmmRegister dst, XmmRegister src);
 
+  void pcmpgtb(XmmRegister dst, XmmRegister src);
+  void pcmpgtw(XmmRegister dst, XmmRegister src);
+  void pcmpgtd(XmmRegister dst, XmmRegister src);
+  void pcmpgtq(XmmRegister dst, XmmRegister src);  // SSE4.2
+
   void shufpd(XmmRegister dst, XmmRegister src, const Immediate& imm);
   void shufps(XmmRegister dst, XmmRegister src, const Immediate& imm);
   void pshufd(XmmRegister dst, XmmRegister src, const Immediate& imm);