> Currently `"VectorMask.eq()" `is not vectorized:
>
> public VectorMask<E> eq(VectorMask<E> m) {
> // FIXME: Generate good code here.
> return bOp(m, (i, a, b) -> a == b);
> }
>
> This can be implemented by calling `"xor(m.not())"` directly.
>
> The performance improved about 1.4x ~ 1.9x for the following benchmark with
> different basic types:
>
> @Benchmark
> public Object eq() {
> boolean[] ma = fm.apply(size);
> boolean[] mb = fmb.apply(size);
> boolean[] mt = fmt.apply(size);
> VectorMask<Byte> m = VectorMask.fromArray(SPECIES, mt, 0);
>
> for (int ic = 0; ic < INVOC_COUNT; ic++) {
> for (int i = 0; i < ma.length; i += SPECIES.length()) {
> var av = SPECIES.loadMask(ma, i);
> var bv = SPECIES.loadMask(mb, i);
>
> // accumulate results, so JIT can't eliminate relevant
> computations
> m = m.and(av.eq(bv));
> }
> }
>
> return m;
> }
Xiaohong Gong has updated the pull request with a new target base due to a
merge or a rebase. The incremental webrev excludes the unrelated changes
brought in by the merge/rebase. The pull request contains two additional
commits since the last revision:
- Merge branch 'jdk:master' into JDK-8267969
- 8267969: Add vectorized implementation for VectorMask.eq()
-------------
Changes:
- all: https://git.openjdk.java.net/jdk/pull/4272/files
- new: https://git.openjdk.java.net/jdk/pull/4272/files/0e8e0e84..f3a48026
Webrevs:
- full: https://webrevs.openjdk.java.net/?repo=jdk&pr=4272&range=01
- incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=4272&range=00-01
Stats: 22530 lines in 577 files changed: 2836 ins; 18744 del; 950 mod
Patch: https://git.openjdk.java.net/jdk/pull/4272.diff
Fetch: git fetch https://git.openjdk.java.net/jdk pull/4272/head:pull/4272
PR: https://git.openjdk.java.net/jdk/pull/4272
