164 lines
7.2 KiB
Java
164 lines
7.2 KiB
Java
/*
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* Copyright Amazon.com Inc. or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/**
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* @test TestFpRegsABI
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* @bug 8324874
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* @summary ABI for the Arm 64-bit Architecture requires to preserve registers v8-v15 by a callee across subroutine calls
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*
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* @run main/othervm -XX:-TieredCompilation -Xbatch -XX:CompileCommand=inline,*::calcValue compiler.intrinsics.zip.TestFpRegsABI
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* @run main/othervm -XX:-TieredCompilation -Xbatch -XX:CompileCommand=dontinline,*::calcValue compiler.intrinsics.zip.TestFpRegsABI
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* @run main/othervm -XX:+TieredCompilation -XX:TieredStopAtLevel=1 -Xbatch -XX:CompileCommand=inline,*::calcValue compiler.intrinsics.zip.TestFpRegsABI
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* @run main/othervm -XX:+TieredCompilation -XX:TieredStopAtLevel=1 -Xbatch -XX:CompileCommand=dontinline,*::calcValue compiler.intrinsics.zip.TestFpRegsABI
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* @run main/othervm -Xbatch -XX:CompileCommand=inline,*::calcValue compiler.intrinsics.zip.TestFpRegsABI
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* @run main/othervm -Xbatch -XX:CompileCommand=dontinline,*::calcValue compiler.intrinsics.zip.TestFpRegsABI
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* @run main/othervm -Xint compiler.intrinsics.zip.TestFpRegsABI
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*/
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package compiler.intrinsics.zip;
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import java.util.zip.Checksum;
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import java.util.zip.CRC32;
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import java.util.zip.CRC32C;
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public class TestFpRegsABI {
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private static byte[] buf;
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static {
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buf = new byte[1024];
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for (int i = 0; i < buf.length; ++i) {
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buf[i] = (byte)i;
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}
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}
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private static class RegressionTest {
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Checksum checksum;
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RegressionTest(Checksum checksum) {
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this.checksum = checksum;
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}
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public void run(byte[] buf, long expectedValue) {
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for (int i = 0; i < 20_000; ++i) {
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runIteration(buf, expectedValue);
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}
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}
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// If checksum intrinsic does not save fp registers as ABI requires,
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// the second call of calcValue might produce a wrong result.
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private void runIteration(byte[] buf, long expectedValue) {
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int v1 = calcValue(buf);
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checksum.reset();
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checksum.update(buf, 0, buf.length);
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long checksumValue = checksum.getValue();
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if (checksumValue != expectedValue) {
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System.err.printf("ERROR: checksum = 0x%016x, expected = 0x%016x\n",
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checksumValue, expectedValue);
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throw new RuntimeException("Checksum Error");
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}
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int v2 = calcValue(buf);
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if (v1 != v2) {
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throw new RuntimeException("Expect v2(" + v2 + ") to equal v1(" + v1 + ")");
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}
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}
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private int calcValue(byte[] buf) {
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return (int)(2.5 * buf.length);
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}
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}
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private static class TestIntrinsic {
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Checksum checksum;
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TestIntrinsic(Checksum checksum) {
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this.checksum = checksum;
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}
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public void run(byte[] buf, long expectedValue) {
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for (int i = 0; i < 20_000; ++i) {
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runIteration(buf, expectedValue);
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}
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}
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// If checksum intrinsic does not save fp registers as ABI requires,
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// the second call of calcValue might produce a wrong result.
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private void runIteration(byte[] buf, long expectedValue) {
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int v1 = calcValue(buf);
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checksum.reset();
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checksum.update(buf, 0, buf.length);
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long checksumValue = checksum.getValue();
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if (checksumValue != expectedValue) {
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System.err.printf("ERROR: checksum = 0x%016x, expected = 0x%016x\n",
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checksumValue, expectedValue);
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throw new RuntimeException("Checksum Error");
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}
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int v2 = calcValue(buf);
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if (v1 != v2) {
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throw new RuntimeException("Expect v2(" + v2 + ") to equal v1(" + v1 + ")");
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}
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}
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// ABI can require some fp registers to be saved by a callee, e.g. v8-15 in ARM64 ABI.
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// We create fp register pressure to get as many fp registers used as possible.
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private int calcValue(byte[] buf) {
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double v = 0.0;
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for (int i = 24; i <= buf.length; i += 24) {
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v += buf[i - 1] * ((double)i - 1.0) + (double)i - 1.0;
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v += buf[i - 2] * ((double)i - 2.0) + (double)i - 2.0;
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v += buf[i - 3] * ((double)i - 3.0) + (double)i - 3.0;
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v += buf[i - 4] * ((double)i - 4.0) + (double)i - 4.0;
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v += buf[i - 5] * ((double)i - 5.0) + (double)i - 5.0;
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v += buf[i - 6] * ((double)i - 6.0) + (double)i - 6.0;
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v += buf[i - 7] * ((double)i - 7.0) + (double)i - 7.0;
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v += buf[i - 8] * ((double)i - 8.0) + (double)i - 8.0;
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v += buf[i - 9] * ((double)i - 9.0) + (double)i - 9.0;
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v += buf[i - 10] * ((double)i - 10.0) + (double)i - 10.0;
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v += buf[i - 11] * ((double)i - 11.0) + (double)i - 11.0;
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v += buf[i - 12] * ((double)i - 12.0) + (double)i - 12.0;
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v += buf[i - 13] * ((double)i - 13.0) + (double)i - 13.0;
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v += buf[i - 14] * ((double)i - 14.0) + (double)i - 14.0;
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v += buf[i - 15] * ((double)i - 15.0) + (double)i - 15.0;
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v += buf[i - 16] * ((double)i - 16.0) + (double)i - 16.0;
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v += buf[i - 17] * ((double)i - 17.0) + (double)i - 17.0;
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v += buf[i - 18] * ((double)i - 18.0) + (double)i - 18.0;
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v += buf[i - 19] * ((double)i - 19.0) + (double)i - 19.0;
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v += buf[i - 20] * ((double)i - 20.0) + (double)i - 20.0;
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v += buf[i - 21] * ((double)i - 21.0) + (double)i - 21.0;
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v += buf[i - 22] * ((double)i - 22.0) + (double)i - 22.0;
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v += buf[i - 23] * ((double)i - 23.0) + (double)i - 23.0;
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v += buf[i - 24] * ((double)i - 24.0) + (double)i - 24.0;
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}
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return (int)v;
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}
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}
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public static void main(final String[] argv) {
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new TestIntrinsic(new CRC32()).run(buf, 0x00000000b70b4c26L);
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new TestIntrinsic(new CRC32C()).run(buf, 0x000000002cdf6e8fL);
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new RegressionTest(new CRC32()).run(buf, 0x00000000b70b4c26L);
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new RegressionTest(new CRC32C()).run(buf, 0x000000002cdf6e8fL);
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}
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}
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