newlen := vecMinLen - align
			crc = ppc64SlicingUpdateBy8(crc, archCastagnoliTable8, p[:newlen])
			p = p[newlen:]
		}
		// p should be aligned now
		aligned := len(p) & ^vecAlignMask
		crc = vectorCrc32(crc, crcCast, p[:aligned])
		p = p[aligned:]
	}
	if len(p) == 0 {
		return crc
	}
	return ppc64SlicingUpdateBy8(crc, archCastagnoliTable8, p)
}

func archAvailableIEEE() bool {

#define const1	V24
#define const2	V25

#define byteswap	V26
#define mask_32bit	V27
#define mask_64bit	V28
#define zeroes		V29

#define MAX_SIZE	32*1024
#define REFLECT

TEXT ·ppc64SlicingUpdateBy8(SB), NOSPLIT|NOFRAME, $0-44
	MOVWZ	crc+0(FP), R3   // incoming crc
	MOVD    table8+8(FP), R4   // *Table
	MOVD    p+16(FP), R5
	MOVD    p_len+24(FP), R6 // p len

	CMP     $0,R6           // len == 0?