diff --git a/sm2/p256_asm.go b/sm2/p256_asm.go
index f626e63..c9bd82e 100644
--- a/sm2/p256_asm.go
+++ b/sm2/p256_asm.go
@@ -446,6 +446,7 @@ func boothW6(in uint) (int, int) {
 	return int(d), int(s & 1)
 }
 
+// table[i][j] = (2^(6*i))*j*G mod P
 func initTable() {
 	p256Precomputed = new([43][32 * 8]uint64)