// using this polynomial.
var castagnoliTable *Table
var castagnoliTable8 *slicing8Table
var updateCastagnoli func(crc uint32, p []byte) uint32
var castagnoliOnce sync.Once
var haveCastagnoli atomic.Bool

func castagnoliInit() {
	castagnoliTable = simpleMakeTable(Castagnoli)

	if archAvailableCastagnoli() {
		archInitCastagnoli()
		updateCastagnoli = archUpdateCastagnoli
	} else {
		// Initialize the slicing-by-8 table.