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comparison agent/src/share/classes/sun/jvm/hotspot/asm/sparc/V9CMoveDecoder.java @ 0:a61af66fc99e jdk7-b24

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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children c18cbe5936b8
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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 abstract class V9CMoveDecoder extends InstructionDecoder
31 implements V9InstructionDecoder {
32 static private final String iccConditionNames[] = {
33 "n", "e", "le", "l", "leu", "cs", "neg", "vs",
34 "a", "ne", "g", "ge", "gu", "cc", "pos", "vc"
35 };
36
37 static private final String fccConditionNames[] = {
38 "fn", "fne", "flg", "ful", "fl", "fug", "fg", "fu",
39 "fa", "fe", "fue", "fge", "fuge", "fle", "fule", "fo"
40 };
41
42 static String getConditionName(int conditionCode, int conditionFlag) {
43 return (conditionFlag == icc || conditionFlag == xcc) ?
44 iccConditionNames[conditionCode]
45 : fccConditionNames[conditionCode];
46 }
47
48 static int getMoveConditionCode(int instruction) {
49 return (instruction & CMOVE_COND_MASK) >>> CMOVE_COND_START_BIT;
50 }
51
52 static int getRegisterConditionCode(int instruction) {
53 return (instruction & CMOVE_RCOND_MASK) >>> CMOVE_RCOND_START_BIT;
54 }
55
56 static ImmediateOrRegister getCMoveSource(int instruction, int numBits) {
57 ImmediateOrRegister source = null;
58 if (isIBitSet(instruction)) {
59 source = new Immediate(new Short((short) extractSignedIntFromNBits(instruction, numBits)));
60 } else {
61 source = SPARCRegisters.getRegister(getSourceRegister2(instruction));
62 }
63 return source;
64 }
65
66 static String getFloatTypeCode(int dataType) {
67 String result = null;
68 switch(dataType) {
69 case RTLDT_FL_SINGLE:
70 result = "s";
71 break;
72
73 case RTLDT_FL_DOUBLE:
74 result = "d";
75 break;
76
77 case RTLDT_FL_QUAD:
78 result = "q";
79 break;
80
81 default:
82 if (Assert.ASSERTS_ENABLED)
83 Assert.that(false, "should not reach here");
84 }
85 return result;
86 }
87 }