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/*
* 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*::<clinit>
* 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();
}
}
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