/*
* Copyright (c) 2016, 2018, 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. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* 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 org.graalvm.compiler.hotspot.replacements;
import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.arrayStart;
import org.graalvm.compiler.api.replacements.ClassSubstitution;
import org.graalvm.compiler.api.replacements.MethodSubstitution;
import org.graalvm.compiler.hotspot.HotSpotBackend;
@ClassSubstitution(className = "java.math.BigInteger", optional = true)
public class BigIntegerSubstitutions {
@MethodSubstitution(isStatic = false)
static int[] multiplyToLen(@SuppressWarnings("unused") Object receiver, int[] x, int xlen, int[] y, int ylen, int[] zIn) {
return multiplyToLenStatic(x, xlen, y, ylen, zIn);
}
@MethodSubstitution(isStatic = true)
static int[] multiplyToLenStatic(int[] x, int xlen, int[] y, int ylen, int[] zIn) {
int[] zResult = zIn;
int zLen;
if (zResult == null || zResult.length < (xlen + ylen)) {
zLen = xlen + ylen;
zResult = new int[xlen + ylen];
} else {
zLen = zIn.length;
}
HotSpotBackend.multiplyToLenStub(arrayStart(x), xlen, arrayStart(y), ylen, arrayStart(zResult), zLen);
return zResult;
}
}