diff --git a/zuc/eia256.go b/zuc/eia256.go
index 935a439..9d2ba70 100644
--- a/zuc/eia256.go
+++ b/zuc/eia256.go
@@ -224,6 +224,7 @@ func (m *ZUC256Mac) Finish(p []byte, nbits int) []byte {
 		b = p[nbytes]
 	}
 	digest := m.checkSum(nRemainBits, b)
+	m.Reset()
 	return digest[:]
 }
 
diff --git a/zuc/eia256_asm_ppc64x.s b/zuc/eia256_asm_ppc64x.s
index cd87cf6..a5234d9 100644
--- a/zuc/eia256_asm_ppc64x.s
+++ b/zuc/eia256_asm_ppc64x.s
@@ -52,8 +52,8 @@ TEXT ·eia256RoundTag8(SB),NOSPLIT,$0
 	MOVD	$0x10, R8
 	LXVD2X (PTR)(R8), BIT_REV_TAB_L
 	VSLB  BIT_REV_TAB_L, XTMP2, BIT_REV_TAB_H
-	VPERM BIT_REV_TAB_L, BIT_REV_TAB_L, XTMP3, XTMP3
-	VPERM BIT_REV_TAB_H, BIT_REV_TAB_H, XTMP1, XTMP1
+	VPERM BIT_REV_TAB_L, BIT_REV_TAB_L, XTMP1, XTMP1
+	VPERM BIT_REV_TAB_H, BIT_REV_TAB_H, XTMP3, XTMP3
 	VXOR XTMP1, XTMP3, XTMP3 // XTMP3 - bit reverse data bytes
 
 	// ZUC authentication part, 4x32 data bits
@@ -142,8 +142,8 @@ TEXT ·eia256RoundTag16(SB),NOSPLIT,$0
 	MOVD	$0x10, R8
 	LXVD2X (PTR)(R8), BIT_REV_TAB_L
 	VSLB  BIT_REV_TAB_L, XTMP2, BIT_REV_TAB_H
-	VPERM BIT_REV_TAB_L, BIT_REV_TAB_L, XTMP3, XTMP3
-	VPERM BIT_REV_TAB_H, BIT_REV_TAB_H, XTMP1, XTMP1
+	VPERM BIT_REV_TAB_L, BIT_REV_TAB_L, XTMP1, XTMP1
+	VPERM BIT_REV_TAB_H, BIT_REV_TAB_H, XTMP3, XTMP3
 	VXOR XTMP1, XTMP3, XTMP3 // XTMP3 - bit reverse data bytes
 
 	// ZUC authentication part, 4x32 data bits