// me | mb<<8 | rotate<<16 | nbits<<24 where me and mb can
// be used to regenerate the input mask.
func encodePPC64RotateMask(rotate, mask, nbits int64) int64 {
	var mb, me, mbn, men int

	// Determine boundaries and then decode them
	if mask == 0 || ^mask == 0 || rotate >= nbits {
		panic(fmt.Sprintf("invalid PPC64 rotate mask: %x %d %d", uint64(mask), rotate, nbits))
	} else if nbits == 32 {

(RotateLeft(32|64) ...) => ((ROTLW|ROTL) ...)

// Constant rotate generation
(ROTLW  x (MOVDconst [c])) => (ROTLWconst  x [c&31])
(ROTL   x (MOVDconst [c])) => (ROTLconst   x [c&63])

// Combine rotate and mask operations
(ANDconst [m] (ROTLWconst [r] x)) && isPPC64WordRotateMask(m) => (RLWINM [encodePPC64RotateMask(r,m,32)] x)

		batchLogIf(j.ctx, err)
		return
	}
	for result := range results {
		if result.Err != nil {
			batchLogIf(j.ctx, result.Err)
			continue
		}
		// ignore batch-replicate.bin and batch-rotate.bin entries
		if strings.HasSuffix(result.Item.Name, slashSeparator) {
			continue
		}
		req := &BatchJobRequest{}
		if err := req.load(ctx, j.objLayer, result.Item.Name); err != nil {
			batchLogIf(ctx, err)