diff --git a/gcc/config/i386/lzcntintrin.h b/gcc/config/i386/lzcntintrin.h
index 31db7dc..31a7163 100644
--- a/gcc/config/i386/lzcntintrin.h
+++ b/gcc/config/i386/lzcntintrin.h
@@ -44,12 +44,24 @@ __lzcnt32 (unsigned int __X)
   return __builtin_clz (__X);
 }
 
+extern __inline unsigned int __attribute__((__gnu_inline__, __always_inline__, __artificial__))
+_lzcnt_u32 (unsigned int __X)
+{
+  return __builtin_clz (__X);
+}
+
 #ifdef __x86_64__
 extern __inline unsigned long long __attribute__((__gnu_inline__, __always_inline__, __artificial__))
 __lzcnt64 (unsigned long long __X)
 {
   return __builtin_clzll (__X);
 }
+
+extern __inline unsigned long long __attribute__((__gnu_inline__, __always_inline__, __artificial__))
+_lzcnt_u64 (unsigned long long __X)
+{
+  return __builtin_clzll (__X);
+}
 #endif
 
 #endif /* _LZCNTINTRIN_H_INCLUDED */