Summary

Add method VectorMask::xor(VectorMask) to the abstract class jdk.incubator.vector.VectorMask.

Problem

Currently, VectorMask has methods to perform logical binary and, or, andNot and xorNot (eq) but not xor (exclusive or). This is a basic logical operation that often appears naturally in logical contexts. Furthermore, we do have this method implemented in the concrete implementation of VectorMask to implement VectorMask::not and VectorMask::eq.

Solution

Expose VectorMask::xor in the public API of the Vector API.

Specification

/**
 * Determines logical symmetric difference
 * (as {@code a^b}) of this mask and a second input mask.
 * <p>
 * This is a lane-wise binary operation which applies
 * the logical {@code XOR} operation
 * ({@code ^}) to each corresponding pair of mask bits.
 *
 * @param m the input mask
 * @return the result of logically disjunctively disjoining the two
 * input masks
 */
public abstract VectorMask<E> xor(VectorMask<E> m);