//go:build !purego package sm3 func kdf(baseMD *digest, keyLen int, limit int) []byte { if limit < 4 { return kdfGeneric(baseMD, keyLen, limit) } if useAVX2 && limit >= 8 { return kdfBy8(baseMD, keyLen, limit) } return kdfBy4(baseMD, keyLen, limit) }