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comparison graal/com.oracle.graal.snippets/src/com/oracle/graal/snippets/nodes/WriteRegisterNode.java @ 8354:55ef03d64f03

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Generalize read and write of fixed register for snippets. Move to HotSpot-independent project.
author Christian Wimmer <christian.wimmer@oracle.com>
date Mon, 18 Mar 2013 19:28:44 -0700
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8353:98b90a7bb764 8354:55ef03d64f03
1 /*
2 * Copyright (c) 2013, 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23 package com.oracle.graal.snippets.nodes;
24
25 import com.oracle.graal.api.code.*;
26 import com.oracle.graal.api.meta.*;
27 import com.oracle.graal.graph.*;
28 import com.oracle.graal.nodes.*;
29 import com.oracle.graal.nodes.spi.*;
30 import com.oracle.graal.nodes.type.*;
31
32 /**
33 * Changes the value of a specific register.
34 */
35 @NodeInfo(nameTemplate = "WriteRegister %{p#register}")
36 public final class WriteRegisterNode extends FixedWithNextNode implements LIRLowerable {
37
38 /**
39 * The fixed register to access.
40 */
41 private final Register register;
42
43 /**
44 * The new value assigned to the register.
45 */
46 @Input private ValueNode value;
47
48 public WriteRegisterNode(Register register, ValueNode value) {
49 super(StampFactory.forVoid());
50 this.register = register;
51 this.value = value;
52 }
53
54 @Override
55 public void generate(LIRGeneratorTool generator) {
56 Value val = generator.operand(value);
57 generator.emitMove(val, register.asValue(val.getKind()));
58 }
59
60 @Override
61 public String toString(Verbosity verbosity) {
62 if (verbosity == Verbosity.Name) {
63 return super.toString(Verbosity.Name) + "%" + register;
64 } else {
65 return super.toString(verbosity);
66 }
67 }
68 }