//
// 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))
	men := uint32(32 - bits.TrailingZeros32(^mask))
	// Check for a wrapping mask (e.g bits at 0 and 31)
	if mb == 0 && me == 32 {
		// swap the inverted values
		mb, me = men, mbn
	}