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/*
* 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 byte getByte(Object o, long base, int i) {
// This technically leads to UB, what we need is UNSAFE.getByteUnaligned but they seem to be equivalent
return UNSAFE.getByte(o, base + (long)i * Unsafe.ARRAY_BYTE_INDEX_SCALE);
}
public static void putByte(Object o, long base, int i, byte value) {
// This technically leads to UB, what we need is UNSAFE.putByteUnaligned but they seem to be equivalent
UNSAFE.putByte(o, base + (long)i * Unsafe.ARRAY_BYTE_INDEX_SCALE, value);
}
public static short getShort(Object o, long base, int i) {
return UNSAFE.getShort(o, base + (long)i * Unsafe.ARRAY_SHORT_INDEX_SCALE);
}
public static void putShort(Object o, long base, int i, short value) {
UNSAFE.putShort(o, base + (long)i * Unsafe.ARRAY_SHORT_INDEX_SCALE, value);
}
public static int getInt(Object o, long base, int i) {
return UNSAFE.getInt(o, base + (long)i * Unsafe.ARRAY_INT_INDEX_SCALE);
}
public static void putInt(Object o, long base, int i, int value) {
UNSAFE.putInt(o, base + (long)i * Unsafe.ARRAY_INT_INDEX_SCALE, value);
}
public static long getLong(Object o, long base, int i) {
return UNSAFE.getLong(o, base + (long)i * Unsafe.ARRAY_LONG_INDEX_SCALE);
}
public static void putLong(Object o, long base, int i, long value) {
UNSAFE.putLong(o, base + (long)i * Unsafe.ARRAY_LONG_INDEX_SCALE, value);
}
public static float getFloat(Object o, long base, int i) {
return UNSAFE.getFloat(o, base + (long)i * Unsafe.ARRAY_FLOAT_INDEX_SCALE);
}
public static void putFloat(Object o, long base, int i, float value) {
UNSAFE.putFloat(o, base + (long)i * Unsafe.ARRAY_FLOAT_INDEX_SCALE, value);
}
public static double getDouble(Object o, long base, int i) {
return UNSAFE.getDouble(o, base + (long)i * Unsafe.ARRAY_DOUBLE_INDEX_SCALE);
}
public static void putDouble(Object o, long base, int i, double value) {
UNSAFE.putDouble(o, base + (long)i * Unsafe.ARRAY_DOUBLE_INDEX_SCALE, value);
}
}
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