Mercurial > hg > graal-jvmci-8

comparison agent/src/share/classes/sun/jvm/hotspot/asm/sparc/V9WriteDecoder.java @ 0:a61af66fc99e jdk7-b24

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Initial load
author duke
date Sat, 01 Dec 2007 00:00:00 +0000
parents
children c18cbe5936b8
comparison
equal deleted inserted replaced
-1:000000000000 0:a61af66fc99e
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 class V9WriteDecoder extends InstructionDecoder
30 implements V9InstructionDecoder {
31 Instruction decode(int instruction, SPARCInstructionFactory factory) {
32 SPARCV9InstructionFactory v9factory = (SPARCV9InstructionFactory) factory;
33 Instruction instr = null;
34 int specialRegNum = getDestinationRegister(instruction);
35
36 // rd values 1, 4,5 7-14 are reserved - see page 244, A.63 Write State Register.
37 if (specialRegNum == 1 || specialRegNum == 4 || specialRegNum == 5
38 || (specialRegNum > 6 && specialRegNum < 15)) {
39 instr = v9factory.newIllegalInstruction(instruction);
40 } else {
41 int rs1Num = getSourceRegister1(instruction);
42 if (specialRegNum == 15) {
43 if (isIBitSet(instruction) && rs1Num == 0) {
44 instr = v9factory.newV9SirInstruction();
45 } else {
46 instr = v9factory.newIllegalInstruction(instruction);
47 }
48 } else {
49 int asrRegNum = -1;
50 if (specialRegNum > 15) {
51 asrRegNum = specialRegNum;
52 specialRegNum = SPARCV9SpecialRegisters.ASR;
53 }
54 SPARCRegister rs1 = SPARCRegisters.getRegister(rs1Num);
55 instr = v9factory.newV9WriteInstruction(specialRegNum, asrRegNum, rs1, getOperand2(instruction));
56 }
57 }
58
59 return instr;
60 }
61 }