Mercurial > hg > graal-jvmci-8
view graal/com.oracle.graal.replacements/src/com/oracle/graal/replacements/nodes/ReverseBytesNode.java @ 16156:0993768dfc8e
new UnaryNode base class
author | Lukas Stadler <lukas.stadler@oracle.com> |
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date | Mon, 23 Jun 2014 14:11:54 +0200 |
parents | 51ba6c521922 |
children | 13b2e8c4c720 |
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/* * Copyright (c) 2012, 2012, 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 com.oracle.graal.replacements.nodes; import com.oracle.graal.api.meta.*; import com.oracle.graal.compiler.common.type.*; import com.oracle.graal.graph.*; import com.oracle.graal.graph.spi.*; import com.oracle.graal.nodes.*; import com.oracle.graal.nodes.calc.*; import com.oracle.graal.nodes.spi.*; public class ReverseBytesNode extends UnaryNode implements LIRLowerable, Canonicalizable { public ReverseBytesNode(ValueNode value) { super(StampFactory.forKind(value.getKind()), value); assert getKind().isNumericInteger(); } @Override public Node canonical(CanonicalizerTool tool) { if (getValue().isConstant()) { long v = getValue().asConstant().asLong(); if (getKind().getStackKind() == Kind.Int) { return ConstantNode.forInt(Integer.reverseBytes((int) v), graph()); } else if (getKind() == Kind.Long) { return ConstantNode.forLong(Long.reverseBytes(v), graph()); } } return this; } @NodeIntrinsic public static int reverse(int v) { return Integer.reverseBytes(v); } @NodeIntrinsic public static long reverse(long v) { return Long.reverseBytes(v); } @Override public void generate(NodeLIRBuilderTool gen) { Value result = gen.getLIRGeneratorTool().emitByteSwap(gen.operand(getValue())); gen.setResult(this, result); } }