Mercurial > hg > graal-compiler
diff graal/com.oracle.graal.snippets/src/com/oracle/graal/snippets/nodes/ReverseBytesNode.java @ 5874:f0d4304243ff
Add intrinsics for (Long|Integer).(reverseBytes|numberOf(Trail|Lead)ingZeros)
Add tests for those methods
author | Gilles Duboscq <duboscq@ssw.jku.at> |
---|---|
date | Tue, 24 Jul 2012 17:32:42 +0200 |
parents | |
children | 6e66d97a16ae |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/graal/com.oracle.graal.snippets/src/com/oracle/graal/snippets/nodes/ReverseBytesNode.java Tue Jul 24 17:32:42 2012 +0200 @@ -0,0 +1,73 @@ +/* + * 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.snippets.nodes; + +import com.oracle.graal.compiler.gen.*; +import com.oracle.graal.compiler.target.*; +import com.oracle.graal.lir.*; +import com.oracle.graal.nodes.*; +import com.oracle.graal.nodes.calc.*; +import com.oracle.graal.nodes.spi.*; +import com.oracle.graal.nodes.type.*; +import com.oracle.graal.snippets.target.amd64.*; + + +public class ReverseBytesNode extends FloatingNode implements LIRGenLowerable, Canonicalizable { + @Input private ValueNode value; + + public ReverseBytesNode(ValueNode value) { + super(StampFactory.forKind(value.kind())); + assert kind().isInt() || kind().isLong(); + this.value = value; + } + + @Override + public ValueNode canonical(CanonicalizerTool tool) { + if (value.isConstant()) { + long v = value.asConstant().asLong(); + if (kind().isInt()) { + return ConstantNode.forInt(Integer.reverseBytes((int) v), graph()); + } else if (kind().isLong()) { + return ConstantNode.forLong(Long.reverseBytes(v), graph()); + } + } + return this; + } + + @NodeIntrinsic + public static int reverse(@SuppressWarnings("unused") int v) { + throw new UnsupportedOperationException("This method may only be compiled with the Graal compiler"); + } + + @NodeIntrinsic + public static long reverse(@SuppressWarnings("unused") long v) { + throw new UnsupportedOperationException("This method may only be compiled with the Graal compiler"); + } + + @Override + public void generate(LIRGenerator gen) { + Variable result = gen.newVariable(value.kind()); + gen.append(new AMD64ByteSwapOp(result, gen.operand(value))); + gen.setResult(this, result); + } +}