// It is defined in crc32_s390x.s.
//
//go:noescape
func vectorizedCastagnoli(crc uint32, p []byte) uint32

// vectorizedIEEE implements CRC32 using vector instructions.
// It is defined in crc32_s390x.s.
//
//go:noescape
func vectorizedIEEE(crc uint32, p []byte) uint32

func archAvailableCastagnoli() bool {
	return hasVX
}

var archCastagnoliTable8 *slicing8Table

}

var archIeeeTable8 *slicing8Table

func archInitIEEE() {
	// We still use slicing-by-8 for small buffers.
	archIeeeTable8 = slicingMakeTable(IEEE)
}

// archUpdateIEEE calculates the checksum of p using vectorizedIEEE.
func archUpdateIEEE(crc uint32, p []byte) uint32 {

	// Check if vector code should be used.  If not aligned, then handle those
	// first up to the aligned bytes.

	if len(p) >= 4*vecMinLen {

//      V1..V4: Data for CRC computation.
//      V5..V8: Next data chunks that are fetched from the input buffer.
//
//      V9..V14: CRC-32 constants.

// func vectorizedIEEE(crc uint32, p []byte) uint32
TEXT ·vectorizedIEEE(SB),NOSPLIT,$0
	MOVWZ   crc+0(FP), R2     // R2 stores the CRC value
	MOVD    p+8(FP), R3       // data pointer
	MOVD    p_len+16(FP), R4  // len(p)

	MOVD    $·crclecons(SB), R5