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annotate 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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3733
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1 /*
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2 * Copyright (c) 2007, 2011, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 */
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23 package com.sun.max.asm.gen.cisc.x86;
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24
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25 import com.sun.max.asm.*;
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26 import com.sun.max.asm.gen.*;
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27
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28 /**
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29 * An operand that is already implicit in the machine instruction,
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30 * without requiring an assembler method parameter.
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31 */
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32 public class X86ImplicitOperand extends X86Operand implements ImplicitOperand {
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33
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34 private final ImplicitOperand.ExternalPresence externalPresence;
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35 private final Argument argument;
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36
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37 public X86ImplicitOperand(X86Operand.Designation designation, ImplicitOperand.ExternalPresence externalPresence, Argument argument) {
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38 super(designation);
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39 this.externalPresence = externalPresence;
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40 this.argument = argument;
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41 }
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42
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43 public ImplicitOperand.ExternalPresence externalPresence() {
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44 return externalPresence;
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45 }
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46
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47 public Class type() {
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48 return argument.getClass();
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49 }
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50
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51 public Argument argument() {
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52 return argument;
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53 }
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54
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55 public String name() {
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56 if (argument instanceof Enum) {
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57 final Enum enumerable = (Enum) argument;
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58 return enumerable.name();
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59 }
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60 final Immediate8Argument immediate8Argument = (Immediate8Argument) argument;
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61 assert immediate8Argument.value() > 0;
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62 return immediate8Argument.signedExternalValue();
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63 }
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64
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65 @Override
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66 public String toString() {
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67 return "<ImplicitOperand: " + argument.externalValue() + ">";
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68 }
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69 }