Mercurial > hg > truffle
view graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/calc/IntegerRemNode.java @ 21556:48c1ebd24120
renamed com.oracle.graal.api[meta|code] modules to com.oracle.jvmci.[meta|code] (JBS:GRAAL-53)
author | Doug Simon <doug.simon@oracle.com> |
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date | Wed, 27 May 2015 00:36:16 +0200 |
parents | 3bf051bb2691 |
children |
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/* * Copyright (c) 2011, 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.nodes.calc; import com.oracle.graal.compiler.common.type.*; import com.oracle.graal.graph.*; import com.oracle.graal.graph.spi.*; import com.oracle.graal.nodeinfo.*; import com.oracle.graal.nodes.*; import com.oracle.graal.nodes.spi.*; import com.oracle.jvmci.code.*; @NodeInfo(shortName = "%") public class IntegerRemNode extends FixedBinaryNode implements Lowerable, LIRLowerable { public static final NodeClass<IntegerRemNode> TYPE = NodeClass.create(IntegerRemNode.class); public IntegerRemNode(ValueNode x, ValueNode y) { this(TYPE, x, y); } protected IntegerRemNode(NodeClass<? extends IntegerRemNode> c, ValueNode x, ValueNode y) { super(c, IntegerStamp.OPS.getRem().foldStamp(x.stamp(), y.stamp()), x, y); } @Override public boolean inferStamp() { return updateStamp(IntegerStamp.OPS.getRem().foldStamp(getX().stamp(), getY().stamp())); } @Override public ValueNode canonical(CanonicalizerTool tool, ValueNode forX, ValueNode forY) { if (forX.isConstant() && forY.isConstant()) { @SuppressWarnings("hiding") long y = forY.asJavaConstant().asLong(); if (y == 0) { return this; // this will trap, can not canonicalize } return ConstantNode.forIntegerStamp(stamp(), forX.asJavaConstant().asLong() % y); } else if (forY.isConstant()) { long c = forY.asJavaConstant().asLong(); if (c == 1 || c == -1) { return ConstantNode.forIntegerStamp(stamp(), 0); } else if (c > 0 && CodeUtil.isPowerOf2(c) && forX.stamp() instanceof IntegerStamp && ((IntegerStamp) forX.stamp()).isPositive()) { return new AndNode(forX, ConstantNode.forIntegerStamp(stamp(), c - 1)); } } return this; } @Override public void lower(LoweringTool tool) { tool.getLowerer().lower(this, tool); } @Override public void generate(NodeLIRBuilderTool gen) { gen.setResult(this, gen.getLIRGeneratorTool().emitRem(gen.operand(getX()), gen.operand(getY()), gen.state(this))); } @Override public boolean canDeoptimize() { return !(getY().stamp() instanceof IntegerStamp) || ((IntegerStamp) getY().stamp()).contains(0); } }