// Don't use for powers of 2.
	return d&(d-1) != 0
}

// umagicOKn reports whether we should strength reduce an unsigned n-bit divide by c.
// We can strength reduce when c != 0 and c is not a power of two.
func umagicOK8(c int8) bool   { return c&(c-1) != 0 }
func umagicOK16(c int16) bool { return c&(c-1) != 0 }
func umagicOK32(c int32) bool { return c&(c-1) != 0 }
func umagicOK64(c int64) bool { return c&(c-1) != 0 }