88 lines
3.5 KiB
Java
88 lines
3.5 KiB
Java
/*
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* Copyright (c) 2021, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package compiler.vectorapi.reshape.utils;
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import jdk.internal.misc.Unsafe;
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/**
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* Unsafe to check for correctness of reinterpret operations. May be replaced with foreign API later.
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*/
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public class UnsafeUtils {
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private static final Unsafe UNSAFE = Unsafe.getUnsafe();
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public static long arrayBase(Class<?> etype) {
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return UNSAFE.arrayBaseOffset(etype.arrayType());
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}
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public static byte getByte(Object o, long base, int i) {
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// This technically leads to UB, what we need is UNSAFE.getByteUnaligned but they seem to be equivalent
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return UNSAFE.getByte(o, base + (long)i * Unsafe.ARRAY_BYTE_INDEX_SCALE);
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}
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public static void putByte(Object o, long base, int i, byte value) {
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// This technically leads to UB, what we need is UNSAFE.putByteUnaligned but they seem to be equivalent
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UNSAFE.putByte(o, base + (long)i * Unsafe.ARRAY_BYTE_INDEX_SCALE, value);
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}
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public static short getShort(Object o, long base, int i) {
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return UNSAFE.getShort(o, base + (long)i * Unsafe.ARRAY_SHORT_INDEX_SCALE);
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}
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public static void putShort(Object o, long base, int i, short value) {
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UNSAFE.putShort(o, base + (long)i * Unsafe.ARRAY_SHORT_INDEX_SCALE, value);
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}
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public static int getInt(Object o, long base, int i) {
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return UNSAFE.getInt(o, base + (long)i * Unsafe.ARRAY_INT_INDEX_SCALE);
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}
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public static void putInt(Object o, long base, int i, int value) {
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UNSAFE.putInt(o, base + (long)i * Unsafe.ARRAY_INT_INDEX_SCALE, value);
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}
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public static long getLong(Object o, long base, int i) {
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return UNSAFE.getLong(o, base + (long)i * Unsafe.ARRAY_LONG_INDEX_SCALE);
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}
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public static void putLong(Object o, long base, int i, long value) {
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UNSAFE.putLong(o, base + (long)i * Unsafe.ARRAY_LONG_INDEX_SCALE, value);
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}
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public static float getFloat(Object o, long base, int i) {
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return UNSAFE.getFloat(o, base + (long)i * Unsafe.ARRAY_FLOAT_INDEX_SCALE);
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}
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public static void putFloat(Object o, long base, int i, float value) {
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UNSAFE.putFloat(o, base + (long)i * Unsafe.ARRAY_FLOAT_INDEX_SCALE, value);
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}
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public static double getDouble(Object o, long base, int i) {
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return UNSAFE.getDouble(o, base + (long)i * Unsafe.ARRAY_DOUBLE_INDEX_SCALE);
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}
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public static void putDouble(Object o, long base, int i, double value) {
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UNSAFE.putDouble(o, base + (long)i * Unsafe.ARRAY_DOUBLE_INDEX_SCALE, value);
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}
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}
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