diff --git a/sm4/asm_arm64.s b/sm4/asm_arm64.s
index f841889..c731062 100644
--- a/sm4/asm_arm64.s
+++ b/sm4/asm_arm64.s
@@ -181,12 +181,12 @@ TEXT ·expandKeyAsm(SB),NOSPLIT,$0
   VAND x.B16, NIBBLE_MASK.B16, XTMP7.B16
   VTBL XTMP7.B16, [M1L.B16], y.B16
   VUSHR $4, x.D2, x.D2
-  VAND x.B16, NIBBLE_MASK.B16, XTMP7.B16
+  //VAND x.B16, NIBBLE_MASK.B16, XTMP7.B16
   //VTBL XTMP7.B16, [M1H.B16], XTMP7.B16
-  VEOR y.B16, XTMP7.B16, x.B16
+  //VEOR y.B16, XTMP7.B16, x.B16
   //VTBL INVERSE_SHIFT_ROWS.B16, [x.B16], x.B16
   
-  VEOR XTMP7.B16, t0.B16, t0.B16
+  VEOR x.B16, t0.B16, t0.B16
   
   VMOV t0.S[0], R2
   MOVW.P R2, 4(R10)