47 lines
1.8 KiB
Java
47 lines
1.8 KiB
Java
|
/*
|
||
|
|
* Copyright (c) 2021, Oracle and/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.
|
||
|
|
*/
|
||
|
|
|
||
|
|
package compiler.vectorapi.reshape.utils;
|
||
|
|
|
||
|
|
import jdk.internal.misc.Unsafe;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Unsafe to check for correctness of reinterpret operations. May be replaced with foreign API later.
|
||
|
|
*/
|
||
|
|
public class UnsafeUtils {
|
||
|
|
private static final Unsafe UNSAFE = Unsafe.getUnsafe();
|
||
|
|
|
||
|
|
public static long arrayBase(Class<?> etype) {
|
||
|
|
return UNSAFE.arrayBaseOffset(etype.arrayType());
|
||
|
|
}
|
||
|
|
|
||
|
|
public static int getByte(Object o, long base, int i) {
|
||
|
|
// This is technically an UB, what we need is UNSAFE.getByteUnaligned but they seem to be equivalent
|
||
|
|
return UNSAFE.getByte(o, base + i);
|
||
|
|
}
|
||
|
|
|
||
|
|
public static void putByte(Object o, long base, int i, int value) {
|
||
|
|
UNSAFE.putByte(o, base + i, (byte)value);
|
||
|
|
}
|
||
|
|
}
|