Function roundHalfEven

round.go:185–193

(result *BigInt, neg bool, half int)

}

func roundHalfEven(result *BigInt, neg bool, half int) bool {
	if half > 0 {
		return true
	}
	if half < 0 {
		return false
	}
	return result.Bit(0) == 1
}

func roundHalfDown(result *BigInt, neg bool, half int) bool {
	return half > 0