| /* |
| * Copyright 2002 Sun Microsystems, Inc. All Rights Reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| * CA 95054 USA or visit www.sun.com if you need additional information or |
| * have any questions. |
| * |
| */ |
| |
| package sun.jvm.hotspot.asm.sparc; |
| |
| import sun.jvm.hotspot.asm.*; |
| |
| class ReadDecoder extends ReadWriteDecoder { |
| ReadDecoder(int specialRegNum) { |
| super(specialRegNum); |
| } |
| |
| Instruction decodeReadWrite(int instruction, SPARCInstructionFactory factory, |
| int rs1Num, int rdNum) { |
| Instruction instr = null; |
| int specialReg = specialRegNum; |
| if (rs1Num == 0) |
| specialReg = SPARCSpecialRegisters.Y; |
| if (rs1Num == 15 && rdNum == 0) { |
| instr = factory.newStbarInstruction(); |
| } else { |
| instr = factory.newReadInstruction(specialReg, rs1Num, |
| SPARCRegisters.getRegister(rdNum)); |
| } |
| return instr; |
| } |
| } |
