diff --git a/SM4-with-GFNI.md b/SM4-with-GFNI.md
index bb913fa..10c2abe 100644
--- a/SM4-with-GFNI.md
+++ b/SM4-with-GFNI.md
@@ -7,5 +7,14 @@
 - [SM4 GFNI](https://github.com/intel/ipp-crypto/blob/36e76e2388f3dd10cc440e213dfcf6ef59a0dfb8/sources/ippcp/pcpsms4_gfni.h#L4)
 - [gf2p8affineqb: int8 shifting](https://wunkolo.github.io/post/2020/11/gf2p8affineqb-int8-shifting/)
 
+# SM4 SBOX实现对比
+## AESNI
+1. 多条指令实现的仿射
+2. AESENCLAST
+3. 多条指令实现的仿射
+## GFNI
+1. Affine Transformation (单指令)
+2. Affine Transformation Inverse (单指令)
+
 # 生成映射
 [AES SM4 GFNI](https://gist.github.com/emmansun/cb9f14beafa9f75954f3e1883b62a2d3)