var golang.org/x/text/unicode/bidi.xorMasks

2 uses

	golang.org/x/text/unicode/bidi (current package)
		prop.go#L45: 	return xorMasks[p.entry>>xorMaskShift] ^ r
		tables13.0.0.go#L13: var xorMasks = []int32{ // 8 elements