return
}

// Determine the mask begin (mb) and mask end (me) values
// for a valid word rotate mask. A valid 32 bit mask is of
// the form 1+0*1+ or 0*1+0*.
//
// Note, me is inclusive.
func decodeMask32(mask uint32) (mb, me uint32, valid bool) {
	mb = uint32(bits.LeadingZeros32(mask))
	me = uint32(32 - bits.TrailingZeros32(mask))
	mbn := uint32(bits.LeadingZeros32(^mask))