right = (right << 1) | (right >> 31)

	for i := 0; i < 8; i++ {
		left, right = feistel(left, right, c.cipher1.subkeys[2*i], c.cipher1.subkeys[2*i+1])
	}
	for i := 0; i < 8; i++ {
		right, left = feistel(right, left, c.cipher2.subkeys[15-2*i], c.cipher2.subkeys[15-(2*i+1)])
	}
	for i := 0; i < 8; i++ {
		left, right = feistel(left, right, c.cipher3.subkeys[2*i], c.cipher3.subkeys[2*i+1])
	}

	left = (left << 1) | (left >> 31)
	right = (right << 1) | (right >> 31)

	if decrypt {
		for i := 0; i < 8; i++ {
			left, right = feistel(left, right, subkeys[15-2*i], subkeys[15-(2*i+1)])
		}
	} else {
		for i := 0; i < 8; i++ {
			left, right = feistel(left, right, subkeys[2*i], subkeys[2*i+1])
		}
	}

	left = (left << 31) | (left >> 1)
	right = (right << 31) | (right >> 1)