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1 /*
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2 * Copyright 2002 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 package sun.jvm.hotspot.asm.sparc;
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26
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27 import sun.jvm.hotspot.asm.*;
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28
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29 public class SPARCSaveInstruction extends SPARCFormat3AInstruction {
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30 final private boolean trivial;
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31 public SPARCSaveInstruction(SPARCRegister rs1, ImmediateOrRegister operand2, SPARCRegister rd) {
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32 super("save", SAVE, rs1, operand2, rd);
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33 SPARCRegister G0 = SPARCRegisters.G0;
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34 trivial = (rs1 == G0 && operand2 == G0 && rd == G0);
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35 }
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36
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37 public boolean isTrivial() {
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38 return trivial;
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39 }
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40
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41 protected String getOperand2String() {
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42 StringBuffer buf = new StringBuffer();
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43 if (operand2.isRegister()) {
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44 buf.append(operand2.toString());
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45 } else {
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46 Number number = ((Immediate)operand2).getNumber();
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47 int value = number.intValue();
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48 if (value < 0) {
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49 buf.append("-0x");
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50 value = -value;
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51 } else {
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52 buf.append("0x");
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53 }
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54
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55 buf.append(Integer.toHexString(value));
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56 }
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57 return buf.toString();
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58 }
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59
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60 protected String getDescription() {
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61 return (trivial) ? getName() : super.getDescription();
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62 }
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63 }
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