Mercurial > hg > graal-compiler
view graal/com.oracle.graal.replacements/src/com/oracle/graal/replacements/nodes/BitCountNode.java @ 22790:615f3bbbb174
Update jvmci and truffle import: Rename jdk.internal.jvmci to jdk.vm.ci
author | Tom Rodriguez <tom.rodriguez@oracle.com> |
---|---|
date | Thu, 08 Oct 2015 17:41:33 -0700 |
parents | 26bbed810326 |
children | 2a5b62614a96 |
line wrap: on
line source
/* * Copyright (c) 2012, 2015, 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 jdk.vm.ci.code.CodeUtil; import jdk.vm.ci.meta.JavaConstant; import jdk.vm.ci.meta.JavaKind; import com.oracle.graal.compiler.common.type.IntegerStamp; import com.oracle.graal.compiler.common.type.PrimitiveStamp; import com.oracle.graal.compiler.common.type.StampFactory; import com.oracle.graal.graph.NodeClass; import com.oracle.graal.graph.spi.CanonicalizerTool; import com.oracle.graal.lir.gen.ArithmeticLIRGeneratorTool; import com.oracle.graal.nodeinfo.NodeInfo; import com.oracle.graal.nodes.ConstantNode; import com.oracle.graal.nodes.ValueNode; import com.oracle.graal.nodes.calc.UnaryNode; import com.oracle.graal.nodes.spi.ArithmeticLIRLowerable; import com.oracle.graal.nodes.spi.NodeLIRBuilderTool; @NodeInfo public final class BitCountNode extends UnaryNode implements ArithmeticLIRLowerable { public static final NodeClass<BitCountNode> TYPE = NodeClass.create(BitCountNode.class); public BitCountNode(ValueNode value) { super(TYPE, StampFactory.forInteger(JavaKind.Int, 0, ((PrimitiveStamp) value.stamp()).getBits()), value); assert value.getStackKind() == JavaKind.Int || value.getStackKind() == JavaKind.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(JavaKind.Int, Long.bitCount(valueStamp.downMask()), Long.bitCount(valueStamp.upMask()))); } @Override public ValueNode canonical(CanonicalizerTool tool, ValueNode forValue) { if (forValue.isConstant()) { JavaConstant c = forValue.asJavaConstant(); return ConstantNode.forInt(forValue.getStackKind() == JavaKind.Int ? Integer.bitCount(c.asInt()) : Long.bitCount(c.asLong())); } return this; } @Override public void generate(NodeLIRBuilderTool builder, ArithmeticLIRGeneratorTool gen) { builder.setResult(this, gen.emitBitCount(builder.operand(getValue()))); } }