Mercurial > hg > truffle
view graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/calc/DivNode.java @ 21543:93c50cefb9e8
moved GraalInternalError to com.oracle.jvmci.common and renamed it to JVMCIError (JBS:GRAAL-53)
author | Doug Simon <doug.simon@oracle.com> |
---|---|
date | Mon, 25 May 2015 23:30:34 +0200 |
parents | 8fc336a04d77 |
children | 48c1ebd24120 |
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/* * Copyright (c) 2011, 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.nodes.calc; import com.oracle.graal.api.code.*; import com.oracle.graal.api.meta.*; import com.oracle.graal.compiler.common.type.*; import com.oracle.graal.compiler.common.type.ArithmeticOpTable.BinaryOp; import com.oracle.graal.compiler.common.type.ArithmeticOpTable.BinaryOp.Div; import com.oracle.graal.graph.*; import com.oracle.graal.graph.spi.*; import com.oracle.graal.lir.gen.*; import com.oracle.graal.nodeinfo.*; import com.oracle.graal.nodes.*; import com.oracle.graal.nodes.spi.*; @NodeInfo(shortName = "/") public final class DivNode extends BinaryArithmeticNode<Div> { public static final NodeClass<DivNode> TYPE = NodeClass.create(DivNode.class); public DivNode(ValueNode x, ValueNode y) { super(TYPE, ArithmeticOpTable::getDiv, x, y); } public static ValueNode create(ValueNode x, ValueNode y) { BinaryOp<Div> op = ArithmeticOpTable.forStamp(x.stamp()).getDiv(); Stamp stamp = op.foldStamp(x.stamp(), y.stamp()); ConstantNode tryConstantFold = tryConstantFold(op, x, y, stamp); if (tryConstantFold != null) { return tryConstantFold; } else { return new DivNode(x, y); } } @Override public ValueNode canonical(CanonicalizerTool tool, ValueNode forX, ValueNode forY) { ValueNode ret = super.canonical(tool, forX, forY); if (ret != this) { return ret; } if (forY.isConstant()) { Constant c = forY.asConstant(); if (getOp(forX, forY).isNeutral(c)) { return forX; } if (c instanceof PrimitiveConstant && ((PrimitiveConstant) c).getKind().isNumericInteger()) { long i = ((PrimitiveConstant) c).asLong(); boolean signFlip = false; if (i < 0) { i = -i; signFlip = true; } ValueNode divResult = null; if (CodeUtil.isPowerOf2(i)) { divResult = new RightShiftNode(forX, ConstantNode.forInt(CodeUtil.log2(i))); } if (divResult != null) { if (signFlip) { return new NegateNode(divResult); } else { return divResult; } } } } return this; } @Override public void generate(NodeMappableLIRBuilder builder, ArithmeticLIRGenerator gen) { builder.setResult(this, gen.emitDiv(builder.operand(getX()), builder.operand(getY()), null)); } }