Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/debugger/MachineDescriptionTwosComplement.java @ 1913:3b2dea75431e
6984311: JSR 292 needs optional bootstrap method parameters
Summary: Allow CONSTANT_InvokeDynamic nodes to have any number of extra operands.
Reviewed-by: twisti
| author | jrose |
|---|---|
| date | Sat, 30 Oct 2010 13:08:23 -0700 |
| parents | c18cbe5936b8 |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* |
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6941466: Oracle rebranding changes for Hotspot repositories
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2 * Copyright (c) 2000, 2001, 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 * | |
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6941466: Oracle rebranding changes for Hotspot repositories
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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6941466: Oracle rebranding changes for Hotspot repositories
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 25 package sun.jvm.hotspot.debugger; | |
| 26 | |
| 27 /** Base class for all twos-complement machine descriptions, which | |
| 28 handles the cIntegerType{Min,Max}Value methods. */ | |
| 29 | |
| 30 public abstract class MachineDescriptionTwosComplement { | |
| 31 | |
| 32 /** Handles 1, 2, 4, and 8-byte signed integers */ | |
| 33 private static final long[] signedMinValues = { | |
| 34 Byte.MIN_VALUE, | |
| 35 Short.MIN_VALUE, | |
| 36 Integer.MIN_VALUE, | |
| 37 Long.MIN_VALUE | |
| 38 }; | |
| 39 | |
| 40 /** Handles 1, 2, 4, and 8-byte signed integers */ | |
| 41 private static final long[] signedMaxValues = { | |
| 42 Byte.MAX_VALUE, | |
| 43 Short.MAX_VALUE, | |
| 44 Integer.MAX_VALUE, | |
| 45 Long.MAX_VALUE | |
| 46 }; | |
| 47 | |
| 48 /** Handles 1, 2, and 4-byte unsigned integers properly, with a bug | |
| 49 in the 8-byte unsigned integer's constant */ | |
| 50 private static final long[] unsignedMaxValues = { | |
| 51 255L, | |
| 52 65535L, | |
| 53 4294967295L, | |
| 54 -1L | |
| 55 }; | |
| 56 | |
| 57 public long cIntegerTypeMaxValue(long sizeInBytes, boolean isUnsigned) { | |
| 58 if (isUnsigned) { | |
| 59 // Would be nice to signal to the caller that 8-byte unsigned | |
| 60 // integers are not supported properly, but it looks like doing | |
| 61 // so at this level will cause problems above | |
| 62 | |
| 63 return tableLookup(sizeInBytes, unsignedMaxValues); | |
| 64 } else { | |
| 65 return tableLookup(sizeInBytes, signedMaxValues); | |
| 66 } | |
| 67 }; | |
| 68 | |
| 69 public long cIntegerTypeMinValue(long sizeInBytes, boolean isUnsigned) { | |
| 70 if (isUnsigned) { | |
| 71 return 0; | |
| 72 } | |
| 73 | |
| 74 return tableLookup(sizeInBytes, signedMinValues); | |
| 75 } | |
| 76 | |
| 77 // Nearly all of the supported machines are not LP64 */ | |
| 78 public boolean isLP64() { | |
| 79 return false; | |
| 80 } | |
| 81 | |
| 82 private long tableLookup(long sizeInBytes, long[] table) { | |
| 83 switch ((int) sizeInBytes) { | |
| 84 case 1: | |
| 85 return table[0]; | |
| 86 case 2: | |
| 87 return table[1]; | |
| 88 case 4: | |
| 89 return table[2]; | |
| 90 case 8: | |
| 91 return table[3]; | |
| 92 default: | |
| 93 throw new IllegalArgumentException("C integer type of " + sizeInBytes + " not supported"); | |
| 94 } | |
| 95 } | |
| 96 } |