diff --git a/sm4/asm_ppc64x.s b/sm4/asm_ppc64x.s
index 8e0d1cc..5e35f81 100644
--- a/sm4/asm_ppc64x.s
+++ b/sm4/asm_ppc64x.s
@@ -183,6 +183,16 @@ TEXT ·expandKeyAsm(SB),NOSPLIT,$0
 	VSLDOI $4, V1, V1, V2
 	VSLDOI $4, V2, V2, V3
 
+	VOR ESPERMW, ESPERMW, V5
+	SM4_SBOX(V5, V7, V8)
+	STXVW4X V5, (R5)
+
+	VOR ESPERMW, ESPERMW, V5
+	VSRW V5, V_FOUR, V5
+	VAND NIBBLE_MASK, V5, V5
+	STXVW4X V5, (R6)
+
+/*
 ksLoop:
 	LXVW4X (R4), V4
 	SM4_EXPANDKEY_ROUND(V4, V7, V8, V9, V0, V1, V2, V3, V5)
@@ -200,7 +210,7 @@ ksLoop:
 	ADD $16, R4
 	ADD $-16, R6
 	BDNZ	ksLoop
-
+*/
     RET
 
 // func encryptBlocksAsm(xk *uint32, dst, src []byte, inst int)