diff --git a/SM4-with-AESENCLAST.md b/SM4-with-AESENCLAST.md
index f37e1c1..739767e 100644
--- a/SM4-with-AESENCLAST.md
+++ b/SM4-with-AESENCLAST.md
@@ -175,6 +175,7 @@ func sm4_box_aesenclast_intel(rk uint32, t0, t1, t2, t3, a1l, a1h, a2l, a2h __m1
 	return x
 }
 ```
+其实x = mm_shuffle_epi8(x, intelmaskSrows)在mm_aesenclast_si128之前调用，结果也是一样的。  
 
 ## How to calculate lookup table from M, C?
 $\{ M\times i + C \mid i \in [0,255] \}$