Mercurial > hg > truffle
view graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/calc/IntegerConvertNode.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) 2014, 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 java.io.*; import java.util.function.*; import com.oracle.graal.api.meta.*; import com.oracle.graal.compiler.common.type.*; import com.oracle.graal.compiler.common.type.ArithmeticOpTable.IntegerConvertOp; 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.*; /** * An {@code IntegerConvert} converts an integer to an integer of different width. */ @NodeInfo public abstract class IntegerConvertNode<OP, REV> extends UnaryNode implements ConvertNode, ArithmeticLIRLowerable { @SuppressWarnings("rawtypes") public static final NodeClass<IntegerConvertNode> TYPE = NodeClass.create(IntegerConvertNode.class); protected final SerializableIntegerConvertFunction<OP> getOp; protected final SerializableIntegerConvertFunction<REV> getReverseOp; protected final int inputBits; protected final int resultBits; protected interface SerializableIntegerConvertFunction<T> extends Function<ArithmeticOpTable, IntegerConvertOp<T>>, Serializable { } protected IntegerConvertNode(NodeClass<? extends IntegerConvertNode<OP, REV>> c, SerializableIntegerConvertFunction<OP> getOp, SerializableIntegerConvertFunction<REV> getReverseOp, int inputBits, int resultBits, ValueNode input) { super(c, getOp.apply(ArithmeticOpTable.forStamp(input.stamp())).foldStamp(inputBits, resultBits, input.stamp()), input); this.getOp = getOp; this.getReverseOp = getReverseOp; this.inputBits = inputBits; this.resultBits = resultBits; } public int getInputBits() { return inputBits; } public int getResultBits() { return resultBits; } protected final IntegerConvertOp<OP> getOp(ValueNode forValue) { return getOp.apply(ArithmeticOpTable.forStamp(forValue.stamp())); } @Override public Constant convert(Constant c, ConstantReflectionProvider constantReflection) { return getOp(getValue()).foldConstant(getInputBits(), getResultBits(), c); } @Override public Constant reverse(Constant c, ConstantReflectionProvider constantReflection) { IntegerConvertOp<REV> reverse = getReverseOp.apply(ArithmeticOpTable.forStamp(stamp())); return reverse.foldConstant(getResultBits(), getInputBits(), c); } @Override public boolean inferStamp() { return updateStamp(getOp(getValue()).foldStamp(inputBits, resultBits, getValue().stamp())); } @Override public ValueNode canonical(CanonicalizerTool tool, ValueNode forValue) { ValueNode synonym = findSynonym(getOp(forValue), forValue, inputBits, resultBits, stamp()); if (synonym != null) { return synonym; } return this; } protected static <T> ValueNode findSynonym(IntegerConvertOp<T> operation, ValueNode value, int inputBits, int resultBits, Stamp stamp) { if (inputBits == resultBits) { return value; } else if (value.isConstant()) { return ConstantNode.forPrimitive(stamp, operation.foldConstant(inputBits, resultBits, value.asConstant())); } return null; } public static ValueNode convert(ValueNode input, Stamp stamp) { return convert(input, stamp, false); } public static ValueNode convert(ValueNode input, Stamp stamp, StructuredGraph graph) { ValueNode convert = convert(input, stamp, false); if (!convert.isAlive()) { assert !convert.isDeleted(); convert = graph.addOrUnique(convert); } return convert; } public static ValueNode convertUnsigned(ValueNode input, Stamp stamp) { return convert(input, stamp, true); } public static ValueNode convert(ValueNode input, Stamp stamp, boolean zeroExtend) { IntegerStamp fromStamp = (IntegerStamp) input.stamp(); IntegerStamp toStamp = (IntegerStamp) stamp; ValueNode result; if (toStamp.getBits() == fromStamp.getBits()) { result = input; } else if (toStamp.getBits() < fromStamp.getBits()) { result = new NarrowNode(input, fromStamp.getBits(), toStamp.getBits()); } else if (zeroExtend) { // toStamp.getBits() > fromStamp.getBits() result = new ZeroExtendNode(input, toStamp.getBits()); } else { // toStamp.getBits() > fromStamp.getBits() result = new SignExtendNode(input, toStamp.getBits()); } IntegerStamp resultStamp = (IntegerStamp) result.stamp(); assert toStamp.getBits() == resultStamp.getBits(); return result; } }