Mercurial > hg > truffle
view graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/calc/UnsignedDivNode.java @ 19526:8fc336a04d77
Create TYPE fields for LIRInstruction and CompositeValue. Renaming NodeClass#get to NodeClass#create.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Fri, 20 Feb 2015 22:22:55 +0100 |
parents | 61d3cb8e1280 |
children | 3bf051bb2691 |
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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.api.code.*; 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.*; @NodeInfo(shortName = "|/|") public final class UnsignedDivNode extends FixedBinaryNode implements Lowerable, LIRLowerable { public static final NodeClass<UnsignedDivNode> TYPE = NodeClass.create(UnsignedDivNode.class); public UnsignedDivNode(ValueNode x, ValueNode y) { super(TYPE, x.stamp().unrestricted(), x, y); } @Override public ValueNode canonical(CanonicalizerTool tool, ValueNode forX, ValueNode forY) { if (forX.isConstant() && forY.isConstant()) { long yConst = forY.asJavaConstant().asLong(); if (yConst == 0) { return this; // this will trap, cannot canonicalize } return ConstantNode.forIntegerStamp(stamp(), UnsignedMath.divide(forX.asJavaConstant().asLong(), yConst)); } else if (forY.isConstant()) { long c = forY.asJavaConstant().asLong(); if (c == 1) { return forX; } if (CodeUtil.isPowerOf2(c)) { return new UnsignedRightShiftNode(forX, ConstantNode.forInt(CodeUtil.log2(c))); } } return this; } @Override public void lower(LoweringTool tool) { tool.getLowerer().lower(this, tool); } @Override public void generate(NodeLIRBuilderTool gen) { gen.setResult(this, gen.getLIRGeneratorTool().emitUDiv(gen.operand(getX()), gen.operand(getY()), gen.state(this))); } @Override public boolean canDeoptimize() { return !(getY().stamp() instanceof IntegerStamp) || ((IntegerStamp) getY().stamp()).contains(0); } @NodeIntrinsic public static native int unsignedDivide(int a, int b); @NodeIntrinsic public static native long unsignedDivide(long a, long b); }