/* * Copyright (c) 2024, Oracle and/or its affiliates. All rights reserved. * Copyright (c) 2024, Arm Limited. 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. */ package compiler.c2; import jdk.internal.misc.Unsafe; import jdk.test.lib.Asserts; /** * @test TestUnalignedAccess * @summary AArch64: C2 compilation hits offset_ok_for_immed: assert "c2 compiler bug". * @bug 8319690 * @library /test/lib * @modules java.base/jdk.internal.misc * @run main/othervm compiler.c2.TestUnalignedAccess * @run main/othervm -Xcomp -XX:-TieredCompilation -Xmx1g * -XX:CompileCommand=compileonly,compiler.c2.TestUnalignedAccess*:: * compiler.c2.TestUnalignedAccess */ public class TestUnalignedAccess { public static final int LEN = 2040; static final Unsafe UNSAFE = Unsafe.getUnsafe(); static void sink(int x) {} public static long lseed = 1; public static int iseed = 2; public static short sseed = 3; public static byte bseed = 4; public static long lres = lseed; public static int ires = iseed; public static short sres = sseed; public static byte bres = bseed; public static class TestLong { private static final byte[] BYTES = new byte[LEN]; private static final long rawdata = 0xbeef; private static final long data; static { sink(2); // Signed immediate byte offset: range -256 to 255 // Positive immediate byte offset: a multiple of 8 in the range 0 to 32760 // Other immediate byte offsets can't be encoded in the instruction field. // 1030 can't be encoded as "base + offset" mode into the instruction field. UNSAFE.putLongUnaligned(BYTES, 1030, rawdata); lres += UNSAFE.getLongUnaligned(BYTES, 1030); // 127 can be encoded into simm9 field. UNSAFE.putLongUnaligned(BYTES, 127, lres); lres += UNSAFE.getLongUnaligned(BYTES, 127); // 1096 can be encoded into uimm12 field. UNSAFE.putLongUnaligned(BYTES, 1096, lres); data = UNSAFE.getLongUnaligned(BYTES, 1096); } } public static class TestInt { private static final byte[] BYTES = new byte[LEN]; private static final int rawdata = 0xbeef; private static final int data; static { sink(2); // Signed immediate byte offset: range -256 to 255 // Positive immediate byte offset, a multiple of 4 in the range 0 to 16380 // Other immediate byte offsets can't be encoded in the instruction field. // 274 can't be encoded as "base + offset" mode into the instruction field. UNSAFE.putIntUnaligned(BYTES, 274, rawdata); ires += UNSAFE.getIntUnaligned(BYTES, 274); // 255 can be encoded into simm9 field. UNSAFE.putIntUnaligned(BYTES, 255, ires); ires += UNSAFE.getIntUnaligned(BYTES, 255); // 528 can be encoded into uimm12 field. UNSAFE.putIntUnaligned(BYTES, 528, ires); data = UNSAFE.getIntUnaligned(BYTES, 528); } } public static class TestShort { private static final byte[] BYTES = new byte[LEN]; private static final short rawdata = (short)0xbeef; private static final short data; static { sink(2); // Signed immediate byte offset: range -256 to 255 // Positive immediate byte offset: a multiple of 2 in the range 0 to 8190 // Other immediate byte offsets can't be encoded in the instruction field. // 257 can't be encoded as "base + offset" mode into the instruction field. UNSAFE.putShortUnaligned(BYTES, 257, rawdata); sres = (short) (sres + UNSAFE.getShortUnaligned(BYTES, 257)); // 253 can be encoded into simm9 field. UNSAFE.putShortUnaligned(BYTES, 253, sres); sres = (short) (sres + UNSAFE.getShortUnaligned(BYTES, 253)); // 272 can be encoded into uimm12 field. UNSAFE.putShortUnaligned(BYTES, 272, sres); data = UNSAFE.getShortUnaligned(BYTES, 272); } } public static class TestByte { private static final byte[] BYTES = new byte[LEN]; private static final byte rawdata = (byte)0x3f; private static final byte data; static { sink(2); // Signed immediate byte offset: range -256 to 255 // Positive immediate byte offset: range 0 to 4095 // Other immediate byte offsets can't be encoded in the instruction field. // 272 can be encoded into simm9 field. UNSAFE.putByte(BYTES, 272, rawdata); bres = (byte) (bres + UNSAFE.getByte(BYTES, 272)); // 53 can be encoded into simm9 field. UNSAFE.putByte(BYTES, 53, bres); bres = (byte) (bres + UNSAFE.getByte(BYTES, 53)); // 1027 can be encoded into uimm12 field. UNSAFE.putByte(BYTES, 1027, bres); data = UNSAFE.getByte(BYTES, 1027); } } static void test() { TestLong ta = new TestLong(); Asserts.assertEquals(ta.data, (ta.rawdata + lseed) * 2, "putUnaligned long failed!"); TestInt tb = new TestInt(); Asserts.assertEquals(tb.data, (tb.rawdata + iseed) * 2, "putUnaligned int failed!"); TestShort tc = new TestShort(); Asserts.assertEquals(tc.data, (short) (((short) (tc.rawdata + sseed)) * 2), "putUnaligned short failed!"); TestByte td = new TestByte(); Asserts.assertEquals(td.data, (byte) (((byte) (td.rawdata + bseed)) * 2), "put byte failed!"); } public static void main(String[] strArr) { test(); } }