/* * Copyright Amazon.com Inc. or its affiliates. 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 TestFpRegsABI * @bug 8324874 * @summary ABI for the Arm 64-bit Architecture requires to preserve registers v8-v15 by a callee across subroutine calls * * @run main/othervm -XX:-TieredCompilation -Xbatch -XX:CompileCommand=inline,*::calcValue compiler.intrinsics.zip.TestFpRegsABI * @run main/othervm -XX:-TieredCompilation -Xbatch -XX:CompileCommand=dontinline,*::calcValue compiler.intrinsics.zip.TestFpRegsABI * @run main/othervm -XX:+TieredCompilation -XX:TieredStopAtLevel=1 -Xbatch -XX:CompileCommand=inline,*::calcValue compiler.intrinsics.zip.TestFpRegsABI * @run main/othervm -XX:+TieredCompilation -XX:TieredStopAtLevel=1 -Xbatch -XX:CompileCommand=dontinline,*::calcValue compiler.intrinsics.zip.TestFpRegsABI * @run main/othervm -Xbatch -XX:CompileCommand=inline,*::calcValue compiler.intrinsics.zip.TestFpRegsABI * @run main/othervm -Xbatch -XX:CompileCommand=dontinline,*::calcValue compiler.intrinsics.zip.TestFpRegsABI * @run main/othervm -Xint compiler.intrinsics.zip.TestFpRegsABI */ package compiler.intrinsics.zip; import java.util.zip.Checksum; import java.util.zip.CRC32; import java.util.zip.CRC32C; public class TestFpRegsABI { private static byte[] buf; static { buf = new byte[1024]; for (int i = 0; i < buf.length; ++i) { buf[i] = (byte)i; } } private static class RegressionTest { Checksum checksum; RegressionTest(Checksum checksum) { this.checksum = checksum; } public void run(byte[] buf, long expectedValue) { for (int i = 0; i < 20_000; ++i) { runIteration(buf, expectedValue); } } // If checksum intrinsic does not save fp registers as ABI requires, // the second call of calcValue might produce a wrong result. private void runIteration(byte[] buf, long expectedValue) { int v1 = calcValue(buf); checksum.reset(); checksum.update(buf, 0, buf.length); long checksumValue = checksum.getValue(); if (checksumValue != expectedValue) { System.err.printf("ERROR: checksum = 0x%016x, expected = 0x%016x\n", checksumValue, expectedValue); throw new RuntimeException("Checksum Error"); } int v2 = calcValue(buf); if (v1 != v2) { throw new RuntimeException("Expect v2(" + v2 + ") to equal v1(" + v1 + ")"); } } private int calcValue(byte[] buf) { return (int)(2.5 * buf.length); } } private static class TestIntrinsic { Checksum checksum; TestIntrinsic(Checksum checksum) { this.checksum = checksum; } public void run(byte[] buf, long expectedValue) { for (int i = 0; i < 20_000; ++i) { runIteration(buf, expectedValue); } } // If checksum intrinsic does not save fp registers as ABI requires, // the second call of calcValue might produce a wrong result. private void runIteration(byte[] buf, long expectedValue) { int v1 = calcValue(buf); checksum.reset(); checksum.update(buf, 0, buf.length); long checksumValue = checksum.getValue(); if (checksumValue != expectedValue) { System.err.printf("ERROR: checksum = 0x%016x, expected = 0x%016x\n", checksumValue, expectedValue); throw new RuntimeException("Checksum Error"); } int v2 = calcValue(buf); if (v1 != v2) { throw new RuntimeException("Expect v2(" + v2 + ") to equal v1(" + v1 + ")"); } } // ABI can require some fp registers to be saved by a callee, e.g. v8-15 in ARM64 ABI. // We create fp register pressure to get as many fp registers used as possible. private int calcValue(byte[] buf) { double v = 0.0; for (int i = 24; i <= buf.length; i += 24) { v += buf[i - 1] * ((double)i - 1.0) + (double)i - 1.0; v += buf[i - 2] * ((double)i - 2.0) + (double)i - 2.0; v += buf[i - 3] * ((double)i - 3.0) + (double)i - 3.0; v += buf[i - 4] * ((double)i - 4.0) + (double)i - 4.0; v += buf[i - 5] * ((double)i - 5.0) + (double)i - 5.0; v += buf[i - 6] * ((double)i - 6.0) + (double)i - 6.0; v += buf[i - 7] * ((double)i - 7.0) + (double)i - 7.0; v += buf[i - 8] * ((double)i - 8.0) + (double)i - 8.0; v += buf[i - 9] * ((double)i - 9.0) + (double)i - 9.0; v += buf[i - 10] * ((double)i - 10.0) + (double)i - 10.0; v += buf[i - 11] * ((double)i - 11.0) + (double)i - 11.0; v += buf[i - 12] * ((double)i - 12.0) + (double)i - 12.0; v += buf[i - 13] * ((double)i - 13.0) + (double)i - 13.0; v += buf[i - 14] * ((double)i - 14.0) + (double)i - 14.0; v += buf[i - 15] * ((double)i - 15.0) + (double)i - 15.0; v += buf[i - 16] * ((double)i - 16.0) + (double)i - 16.0; v += buf[i - 17] * ((double)i - 17.0) + (double)i - 17.0; v += buf[i - 18] * ((double)i - 18.0) + (double)i - 18.0; v += buf[i - 19] * ((double)i - 19.0) + (double)i - 19.0; v += buf[i - 20] * ((double)i - 20.0) + (double)i - 20.0; v += buf[i - 21] * ((double)i - 21.0) + (double)i - 21.0; v += buf[i - 22] * ((double)i - 22.0) + (double)i - 22.0; v += buf[i - 23] * ((double)i - 23.0) + (double)i - 23.0; v += buf[i - 24] * ((double)i - 24.0) + (double)i - 24.0; } return (int)v; } } public static void main(final String[] argv) { new TestIntrinsic(new CRC32()).run(buf, 0x00000000b70b4c26L); new TestIntrinsic(new CRC32C()).run(buf, 0x000000002cdf6e8fL); new RegressionTest(new CRC32()).run(buf, 0x00000000b70b4c26L); new RegressionTest(new CRC32C()).run(buf, 0x000000002cdf6e8fL); } }