Mercurial > hg > graal-compiler
view graal/com.oracle.graal.replacements/src/com/oracle/graal/replacements/nodes/BitCountNode.java @ 18998:ec0733b5a90a
Allow final modifier on node subclasses and start adding the modifier to leaf classes.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Wed, 28 Jan 2015 02:34:14 +0100 |
parents | f57d86eb036f |
children | 7e2c87dae93e |
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/* * Copyright (c) 2012, 2014, 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.code.*; import com.oracle.graal.api.meta.*; import com.oracle.graal.compiler.common.type.*; import com.oracle.graal.graph.spi.*; import com.oracle.graal.nodeinfo.*; import com.oracle.graal.nodes.*; import com.oracle.graal.nodes.calc.*; import com.oracle.graal.nodes.spi.*; @NodeInfo public final class BitCountNode extends UnaryNode implements LIRLowerable { public BitCountNode(ValueNode value) { super(StampFactory.forInteger(Kind.Int, 0, ((PrimitiveStamp) value.stamp()).getBits()), value); assert value.getKind() == Kind.Int || value.getKind() == Kind.Long; } @Override public boolean inferStamp() { IntegerStamp valueStamp = (IntegerStamp) getValue().stamp(); assert (valueStamp.downMask() & CodeUtil.mask(valueStamp.getBits())) == valueStamp.downMask(); assert (valueStamp.upMask() & CodeUtil.mask(valueStamp.getBits())) == valueStamp.upMask(); return updateStamp(StampFactory.forInteger(Kind.Int, bitCount(valueStamp.downMask()), bitCount(valueStamp.upMask()))); } @Override public ValueNode canonical(CanonicalizerTool tool, ValueNode forValue) { if (forValue.isConstant()) { JavaConstant c = forValue.asJavaConstant(); return ConstantNode.forInt(forValue.getKind() == Kind.Int ? bitCount(c.asInt()) : bitCount(c.asLong())); } return this; } @NodeIntrinsic public static int bitCount(int v) { return Integer.bitCount(v); } @NodeIntrinsic public static int bitCount(long v) { return Long.bitCount(v); } @Override public void generate(NodeLIRBuilderTool gen) { Value result = gen.getLIRGeneratorTool().emitBitCount(gen.operand(getValue())); gen.setResult(this, result); } }