1 /*
   2  * Copyright 2002 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  20  * CA 95054 USA or visit www.sun.com if you need additional information or
  21  * have any questions.
  22  *
  23  */
  24 
  25 package sun.jvm.hotspot.asm.sparc;
  26 
  27 import sun.jvm.hotspot.asm.*;
  28 
  29 abstract class V9AlternateSpaceDecoder extends MemoryInstructionDecoder
  30                     implements V9InstructionDecoder {
  31     V9AlternateSpaceDecoder(int op3, String name, int dataType) {
  32         super(op3, name, dataType);
  33     }
  34 
  35     SPARCRegisterIndirectAddress newRegisterIndirectAddress(SPARCRegister rs1, SPARCRegister rs2) {
  36         return new SPARCV9RegisterIndirectAddress(rs1, rs2);
  37     }
  38 
  39     SPARCRegisterIndirectAddress newRegisterIndirectAddress(SPARCRegister rs1, int offset) {
  40         return new SPARCV9RegisterIndirectAddress(rs1, offset);
  41     }
  42 
  43     abstract Instruction decodeV9AsiLoadStore(int instruction,
  44                                               SPARCV9RegisterIndirectAddress addr,
  45                                               SPARCRegister rd,
  46                                               SPARCV9InstructionFactory factory);
  47 
  48     Instruction decodeMemoryInstruction(int instruction,
  49                                    SPARCRegisterIndirectAddress addr,
  50                                    SPARCRegister rd, SPARCInstructionFactory factory) {
  51         SPARCV9RegisterIndirectAddress v9addr = (SPARCV9RegisterIndirectAddress) addr;
  52         if (isIBitSet(instruction)) {
  53             // indirect asi
  54             v9addr.setIndirectAsi(true);
  55         } else {
  56             // immediate asi
  57             int asi = (instruction & ASI_MASK) >>> ASI_START_BIT;
  58             v9addr.setAddressSpace(asi);
  59         }
  60         return decodeV9AsiLoadStore(instruction, v9addr, rd,
  61                                     (SPARCV9InstructionFactory) factory);
  62     }
  63 }