Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/asm/sparc/BranchDecoder.java @ 1602:136b78722a08
6939203: JSR 292 needs method handle constants
Summary: Add new CP types CONSTANT_MethodHandle, CONSTANT_MethodType; extend 'ldc' bytecode.
Reviewed-by: twisti, never
author | jrose |
---|---|
date | Wed, 09 Jun 2010 18:50:45 -0700 |
parents | c18cbe5936b8 |
children |
rev | line source |
---|---|
0 | 1 /* |
1552
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
0
diff
changeset
|
2 * Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
1552
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
0
diff
changeset
|
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
0
diff
changeset
|
20 * or visit www.oracle.com if you need additional information or have any |
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
0
diff
changeset
|
21 * questions. |
0 | 22 * |
23 */ | |
24 | |
25 package sun.jvm.hotspot.asm.sparc; | |
26 | |
27 import sun.jvm.hotspot.asm.*; | |
28 | |
29 abstract class BranchDecoder extends InstructionDecoder { | |
30 | |
31 // format 2 - condition code names. | |
32 // Appendix F - Opcodes and Condition Codes - Page 231 - Table F-7. | |
33 static final String integerConditionNames[] = { | |
34 "bn", "be", "ble", "bl", "bleu", "bcs", "bneg", "bvs", | |
35 "ba", "bne", "bg", "bge", "bgu", "bcc", "bpos", "bvc" | |
36 }; | |
37 | |
38 static final String integerAnnuledConditionNames[] = { | |
39 "bn,a", "be,a", "ble,a", "bl,a", "bleu,a", "bcs,a", "bneg,a", "bvs,a", | |
40 "ba,a", "bne,a", "bg,a", "bge,a", "bgu,a", "bcc,a", "bpos,a", "bvc,a" | |
41 }; | |
42 | |
43 // format 2 - condition code names. | |
44 // Appendix F - Opcodes and Condition Codes - Page 231 - Table F-7. | |
45 static final String floatConditionNames[] = { | |
46 "fbn", "fbne", "fblg", "fbul", "fbl", "fbug", "fbg", "fbu", | |
47 "fba", "fbe", "fbue", "fbge", "fbuge", "fble", "fbule", "fbo" | |
48 }; | |
49 | |
50 static final String floatAnnuledConditionNames[] = { | |
51 "fbn,a", "fbne,a", "fblg,a", "fbul,a", "fbl,a", "fbug,a", "fbg,a", "fbu,a", | |
52 "fba,a", "fbe,a", "fbue,a", "fbge,a", "fbuge,a", "fble,a", "fbule,a", "fbo,a" | |
53 }; | |
54 | |
55 static boolean getAnnuledBit(int instruction) { | |
56 return (instruction & ANNUL_MASK) != 0; | |
57 } | |
58 | |
59 Instruction decode(int instruction, SPARCInstructionFactory factory) { | |
60 boolean isAnnuled = getAnnuledBit(instruction); | |
61 int conditionCode = getConditionCode(instruction); | |
62 String conditionName = getConditionName(conditionCode, isAnnuled); | |
63 int offset = extractSignedIntFromNBits(instruction, 22); | |
64 // word align the offset by right shifting 2 bits | |
65 offset <<= 2; | |
66 PCRelativeAddress addr = new PCRelativeAddress(offset); | |
67 return factory.newBranchInstruction(conditionName, addr, isAnnuled, conditionCode); | |
68 } | |
69 | |
70 abstract String getConditionName(int conditionCode, boolean isAnnuled); | |
71 } |