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comparison graal/com.oracle.max.asmdis/src/com/sun/max/asm/gen/cisc/x86/X86ImplicitOperand.java @ 3733:e233f5660da4

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Added Java files from Maxine project.
author Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
date Sat, 17 Dec 2011 19:59:18 +0100
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3732:3e2e8b8abdaf 3733:e233f5660da4
1 /*
2 * Copyright (c) 2007, 2011, 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.sun.max.asm.gen.cisc.x86;
24
25 import com.sun.max.asm.*;
26 import com.sun.max.asm.gen.*;
27
28 /**
29 * An operand that is already implicit in the machine instruction,
30 * without requiring an assembler method parameter.
31 */
32 public class X86ImplicitOperand extends X86Operand implements ImplicitOperand {
33
34 private final ImplicitOperand.ExternalPresence externalPresence;
35 private final Argument argument;
36
37 public X86ImplicitOperand(X86Operand.Designation designation, ImplicitOperand.ExternalPresence externalPresence, Argument argument) {
38 super(designation);
39 this.externalPresence = externalPresence;
40 this.argument = argument;
41 }
42
43 public ImplicitOperand.ExternalPresence externalPresence() {
44 return externalPresence;
45 }
46
47 public Class type() {
48 return argument.getClass();
49 }
50
51 public Argument argument() {
52 return argument;
53 }
54
55 public String name() {
56 if (argument instanceof Enum) {
57 final Enum enumerable = (Enum) argument;
58 return enumerable.name();
59 }
60 final Immediate8Argument immediate8Argument = (Immediate8Argument) argument;
61 assert immediate8Argument.value() > 0;
62 return immediate8Argument.signedExternalValue();
63 }
64
65 @Override
66 public String toString() {
67 return "<ImplicitOperand: " + argument.externalValue() + ">";
68 }
69 }