Mercurial > hg > graal-compiler
view graal/com.oracle.graal.replacements/src/com/oracle/graal/replacements/nodes/DirectReadNode.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 | 14e703edb2ab |
children | 0e095e2c24e2 |
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/* * Copyright (c) 2012, 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.replacements.nodes; import com.oracle.graal.compiler.common.type.*; import com.oracle.graal.graph.*; import com.oracle.graal.nodeinfo.*; import com.oracle.graal.nodes.*; import com.oracle.graal.nodes.extended.*; import com.oracle.graal.nodes.spi.*; import com.oracle.jvmci.meta.*; /** * A special purpose store node that differs from {@link UnsafeStoreNode} in that it is not a * {@link StateSplit} and takes a computed address instead of an object. */ @NodeInfo public final class DirectReadNode extends FixedWithNextNode implements LIRLowerable { public static final NodeClass<DirectReadNode> TYPE = NodeClass.create(DirectReadNode.class); @Input protected ValueNode address; protected final Kind readKind; public DirectReadNode(ValueNode address, Kind readKind) { super(TYPE, StampFactory.forKind(readKind.getStackKind())); this.address = address; this.readKind = readKind; } protected ValueNode getAddress() { return address; } /** * If we are sub int sizes, we try to sign/zero extend the value to at least int as it is done * in the {@link com.oracle.graal.replacements.DefaultJavaLoweringProvider#implicitLoadConvert} * and {@link com.oracle.graal.replacements.DefaultJavaLoweringProvider#createUnsafeRead}. * * @see com.oracle.graal.replacements.DefaultJavaLoweringProvider#implicitLoadConvert * @see com.oracle.graal.replacements.DefaultJavaLoweringProvider#createUnsafeRead */ @Override public void generate(NodeLIRBuilderTool gen) { LIRKind kind = gen.getLIRGeneratorTool().target().getLIRKind(readKind); Value loaded = gen.getLIRGeneratorTool().emitLoad(kind, gen.operand(address), null); switch ((Kind) kind.getPlatformKind()) { case Byte: loaded = gen.getLIRGeneratorTool().emitSignExtend(loaded, 8, 32); break; case Short: loaded = gen.getLIRGeneratorTool().emitSignExtend(loaded, 16, 32); break; case Boolean: loaded = gen.getLIRGeneratorTool().emitZeroExtend(loaded, 8, 32); break; case Char: loaded = gen.getLIRGeneratorTool().emitZeroExtend(loaded, 16, 32); break; } gen.setResult(this, loaded); } }