Mercurial > hg > truffle
annotate graal/com.oracle.max.asmdis/src/com/sun/max/asm/gen/risc/RiscFieldDisassembler.java @ 3734:b55f2b8f83fd
Remove deprecated files.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Sat, 17 Dec 2011 20:34:58 +0100 |
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1 /* |
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2 * Copyright (c) 2007, 2011, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. |
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8 * |
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9 * This code is distributed in the hope that it will be useful, but WITHOUT |
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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12 * version 2 for more details (a copy is included in the LICENSE file that |
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13 * accompanied this code). |
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14 * |
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15 * You should have received a copy of the GNU General Public License version |
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16 * 2 along with this work; if not, write to the Free Software Foundation, |
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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18 * |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
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22 */ |
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23 /** |
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24 * |
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25 */ |
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26 package com.sun.max.asm.gen.risc; |
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27 |
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28 import com.sun.max.asm.gen.*; |
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29 import com.sun.max.asm.gen.risc.bitRange.*; |
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30 import com.sun.max.asm.gen.risc.field.*; |
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31 import com.sun.max.lang.*; |
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32 |
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33 /** |
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34 * Disassembles an assembled RISC instruction to show the value of each field in the instruction as |
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35 * well as the bits occupied by the field. |
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36 */ |
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37 class RiscFieldDisassembler<Template_Type extends Template> implements RiscInstructionDescriptionVisitor { |
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38 |
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39 private final Template_Type template; |
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40 private final int assembledInstruction; |
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41 private String string; |
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42 |
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43 public RiscFieldDisassembler(Template_Type template, byte[] assembledInstruction) { |
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44 assert assembledInstruction.length == 4; |
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45 this.template = template; |
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46 this.assembledInstruction = assembledInstruction[0] << 24 | ((assembledInstruction[1] & 0xFF) << 16) | ((assembledInstruction[2] & 0xFF) << 8) | (assembledInstruction[3] & 0xFF); |
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47 } |
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48 |
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49 @Override |
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50 public String toString() { |
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51 if (string == null) { |
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52 string = ""; |
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53 RiscInstructionDescriptionVisitor.Static.visitInstructionDescription(this, template.instructionDescription()); |
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54 } |
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55 return string; |
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56 } |
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57 |
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58 public void visitConstant(RiscConstant constant) { |
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59 visitField(constant.field()); |
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60 } |
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61 |
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62 public void visitConstraint(InstructionConstraint constraint) { |
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63 } |
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64 |
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65 public void visitField(RiscField field) { |
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66 if (string.length() != 0) { |
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67 string += ' '; |
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68 } |
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69 final int value; |
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70 final BitRange bitRange = field.bitRange(); |
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71 final int width = bitRange.width(); |
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72 |
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73 if (field instanceof OperandField) { |
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74 value = ((OperandField) field).extract(assembledInstruction); |
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75 } else { |
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76 value = bitRange.extractUnsignedInt(assembledInstruction); |
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77 } |
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78 String binary = Integer.toBinaryString(value); |
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79 if (binary.length() > width) { |
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80 binary = binary.substring(binary.length() - width); |
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81 } else if (binary.length() < width) { |
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82 binary = Strings.times('0', width - binary.length()) + binary; |
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83 } |
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84 |
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85 string += field.name() + "[" + bitRange + "]=" + value + "{" + binary + "}"; |
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86 } |
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87 |
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88 public void visitString(String s) { |
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89 } |
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90 |
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91 } |