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comparison agent/src/share/classes/sun/jvm/hotspot/asm/sparc/V9FMOVccDecoder.java @ 0:a61af66fc99e jdk7-b24

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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-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 import sun.jvm.hotspot.utilities.Assert;
29
30 class V9FMOVccDecoder extends V9CMoveDecoder implements /* imports */ RTLDataTypes {
31 private final int opf;
32 private final int dataType;
33
34 V9FMOVccDecoder(int opf, int dataType) {
35 this.opf = opf;
36 this.dataType = dataType;
37 }
38
39 private static String getFMoveCCName(int conditionCode, int conditionFlag, int dataType) {
40 StringBuffer buf = new StringBuffer("fmov");
41 buf.append(getFloatTypeCode(dataType));
42 buf.append(getConditionName(conditionCode, conditionFlag));
43 return buf.toString();
44 }
45
46 private static int getFMoveConditionFlag(int instruction) {
47 return (instruction & OPF_CC_MASK) >>> OPF_CC_START_BIT;
48 }
49
50 Instruction decode(int instruction, SPARCInstructionFactory factory) {
51 SPARCV9InstructionFactory v9factory = (SPARCV9InstructionFactory) factory;
52 Instruction instr = null;
53 int conditionFlag = getFMoveConditionFlag(instruction);
54 if (conditionFlag == CFLAG_RESERVED1 || conditionFlag == CFLAG_RESERVED2) {
55 instr = v9factory.newIllegalInstruction(instruction);
56 } else {
57 int rdNum = getDestinationRegister(instruction);
58 int rs1Num = getSourceRegister1(instruction);
59 SPARCRegister rd = RegisterDecoder.decode(dataType, rdNum);
60 int conditionCode = getMoveConditionCode(instruction);
61 SPARCRegister rs = RegisterDecoder.decode(dataType, rs1Num);
62 String name = getFMoveCCName(conditionCode, conditionFlag, dataType);
63 instr = v9factory.newV9FMOVccInstruction(name,opf, conditionCode, conditionFlag,
64 (SPARCFloatRegister)rs, (SPARCFloatRegister)rd);
65 }
66
67 return instr;
68 }
69 }