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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 abstract class V9AlternateSpaceDecoder extends MemoryInstructionDecoder
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30 implements V9InstructionDecoder {
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31 V9AlternateSpaceDecoder(int op3, String name, int dataType) {
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32 super(op3, name, dataType);
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33 }
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34
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35 SPARCRegisterIndirectAddress newRegisterIndirectAddress(SPARCRegister rs1, SPARCRegister rs2) {
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36 return new SPARCV9RegisterIndirectAddress(rs1, rs2);
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37 }
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38
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39 SPARCRegisterIndirectAddress newRegisterIndirectAddress(SPARCRegister rs1, int offset) {
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40 return new SPARCV9RegisterIndirectAddress(rs1, offset);
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41 }
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42
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43 abstract Instruction decodeV9AsiLoadStore(int instruction,
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44 SPARCV9RegisterIndirectAddress addr,
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45 SPARCRegister rd,
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46 SPARCV9InstructionFactory factory);
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47
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48 Instruction decodeMemoryInstruction(int instruction,
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49 SPARCRegisterIndirectAddress addr,
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50 SPARCRegister rd, SPARCInstructionFactory factory) {
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51 SPARCV9RegisterIndirectAddress v9addr = (SPARCV9RegisterIndirectAddress) addr;
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52 if (isIBitSet(instruction)) {
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53 // indirect asi
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54 v9addr.setIndirectAsi(true);
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55 } else {
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56 // immediate asi
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57 int asi = (instruction & ASI_MASK) >>> ASI_START_BIT;
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58 v9addr.setAddressSpace(asi);
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59 }
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60 return decodeV9AsiLoadStore(instruction, v9addr, rd,
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61 (SPARCV9InstructionFactory) factory);
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62 }
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63 }
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