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8381787: Add testcase for Vector Lane Reversal issue

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Reviewed-by: mdoerr, varadam
This commit is contained in:
Amit Kumar 2026-04-15 04:38:38 +00:00
parent 2930e2b530
commit 0a6775a4dc
1 changed files with 84 additions and 0 deletions
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test/jdk/jdk/incubator/vector/TestLongVectorReinterpret.java Normal file
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/*
* Copyright (c) 2026 IBM Corp. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/*
* @test
* @bug 8371187
* @summary Randomized test for lane swapping issue in LongVector reinterpretation on BE platforms
* @modules jdk.incubator.vector
* @run main/othervm --add-modules=jdk.incubator.vector TestLongVectorReinterpret
*/
import jdk.incubator.vector.*;
import java.util.SplittableRandom;
public class TestLongVectorReinterpret {
static final VectorSpecies<Long> SPECIES = LongVector.SPECIES_128;
static final SplittableRandom RAND = new SplittableRandom(42);
public static void main(String[] args) {
for (int iter = 0; iter < 1000; iter++) {
verifyLaneOrdering();
}
}
static void verifyLaneOrdering() {
long[] a = new long[SPECIES.length()];
long[] b = new long[SPECIES.length()];
for (int i = 0; i < a.length; i++) {
a[i] = RAND.nextLong();
b[i] = RAND.nextLong();
}
LongVector v1 = LongVector.fromArray(SPECIES, a, 0);
LongVector v2 = LongVector.fromArray(SPECIES, b, 0);
IntVector result = v2.reinterpretAsInts().add(v1.reinterpretAsInts());
int[] expected = new int[SPECIES.length() * 2];
for (int i = 0; i < a.length; i++) {
int loA = (int) a[i];
int hiA = (int) (a[i] >>> 32);
int loB = (int) b[i];
int hiB = (int) (b[i] >>> 32);
expected[2 * i] = loA + loB;
expected[2 * i + 1] = hiA + hiB;
}
for (int i = 0; i < expected.length; i++) {
int actual = result.lane(i);
if (actual != expected[i]) {
throw new AssertionError(
"Mismatch at lane " + i +
" expected=" + expected[i] +
" actual=" + actual +
" vector=" + result);
}
}
}
}