jodd-core/src/main/java/jodd/crypt/Threefish.java
private void demix(final int j, final int d) {
		y[1] ^= y[0];
		final long rotr = r[d % DEPTH_OF_D_IN_R][j]; // NOTE performance: darn, creation on stack!
		// right shift
		x[1] = (y[1] << (Long.SIZE - rotr)) | (y[1] >>> rotr);
		x[0] = y[0] - x[1];
	}
private void demix(final int j, final int d) {
		y[1] ^= y[0];
		final long rotr = r[d % DEPTH_OF_D_IN_R][j]; // NOTE performance: darn, creation on stack!
		// right shift
		x[1] = (y[1] << (Long.SIZE - rotr)) | (y[1] >>> rotr);
		x[0] = y[0] - x[1];
	}
Implementation of the un-MIX function.