Mercurial > hg > truffle
view graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/calc/FloatEqualsNode.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 | 70d565f6e127 |
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.meta.*; import com.oracle.graal.compiler.common.calc.*; import com.oracle.graal.compiler.common.type.*; import com.oracle.graal.graph.*; import com.oracle.graal.graph.spi.Canonicalizable.BinaryCommutative; import com.oracle.graal.graph.spi.*; import com.oracle.graal.nodeinfo.*; import com.oracle.graal.nodes.*; import com.oracle.graal.nodes.util.*; import com.oracle.jvmci.common.*; @NodeInfo(shortName = "==") public final class FloatEqualsNode extends CompareNode implements BinaryCommutative<ValueNode> { public static final NodeClass<FloatEqualsNode> TYPE = NodeClass.create(FloatEqualsNode.class); public FloatEqualsNode(ValueNode x, ValueNode y) { super(TYPE, Condition.EQ, false, x, y); assert x.stamp() instanceof FloatStamp && y.stamp() instanceof FloatStamp : x.stamp() + " " + y.stamp(); assert x.stamp().isCompatible(y.stamp()); } public static LogicNode create(ValueNode x, ValueNode y, ConstantReflectionProvider constantReflection) { LogicNode result = CompareNode.tryConstantFold(Condition.EQ, x, y, constantReflection, false); if (result != null) { return result; } else { return new FloatEqualsNode(x, y).maybeCommuteInputs(); } } @Override public ValueNode canonical(CanonicalizerTool tool, ValueNode forX, ValueNode forY) { ValueNode result = super.canonical(tool, forX, forY); if (result != this) { return result; } Stamp xStampGeneric = forX.stamp(); Stamp yStampGeneric = forY.stamp(); if (xStampGeneric instanceof FloatStamp && yStampGeneric instanceof FloatStamp) { FloatStamp xStamp = (FloatStamp) xStampGeneric; FloatStamp yStamp = (FloatStamp) yStampGeneric; if (GraphUtil.unproxify(forX) == GraphUtil.unproxify(forY) && xStamp.isNonNaN() && yStamp.isNonNaN()) { return LogicConstantNode.tautology(); } else if (xStamp.alwaysDistinct(yStamp)) { return LogicConstantNode.contradiction(); } } return this; } @Override protected CompareNode duplicateModified(ValueNode newX, ValueNode newY) { if (newX.stamp() instanceof FloatStamp && newY.stamp() instanceof FloatStamp) { return new FloatEqualsNode(newX, newY); } else if (newX.stamp() instanceof IntegerStamp && newY.stamp() instanceof IntegerStamp) { return new IntegerEqualsNode(newX, newY); } throw JVMCIError.shouldNotReachHere(); } @Override public Stamp getSucceedingStampForX(boolean negated) { if (!negated) { return getX().stamp().join(getY().stamp()); } return null; } @Override public Stamp getSucceedingStampForY(boolean negated) { if (!negated) { return getX().stamp().join(getY().stamp()); } return null; } @Override public TriState tryFold(Stamp xStampGeneric, Stamp yStampGeneric) { if (xStampGeneric instanceof FloatStamp && yStampGeneric instanceof FloatStamp) { FloatStamp xStamp = (FloatStamp) xStampGeneric; FloatStamp yStamp = (FloatStamp) yStampGeneric; if (xStamp.alwaysDistinct(yStamp)) { return TriState.FALSE; } else if (xStamp.neverDistinct(yStamp)) { return TriState.TRUE; } } return TriState.UNKNOWN; } }