1 /* |
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2 * Copyright (c) 2002, 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 package sun.jvm.hotspot.interpreter; |
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26 |
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27 import sun.jvm.hotspot.oops.*; |
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28 import sun.jvm.hotspot.utilities.*; |
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29 |
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30 public class BytecodeFastAAccess0 extends BytecodeGetPut { |
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31 BytecodeFastAAccess0(Method method, int bci) { |
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32 super(method, bci); |
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33 } |
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34 |
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35 public int index() { |
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36 return (int) (0xFF & javaShortAt(2)); |
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37 } |
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38 |
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39 public boolean isStatic() { |
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40 return false; |
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41 } |
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42 |
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43 public void verify() { |
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44 if (Assert.ASSERTS_ENABLED) { |
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45 Assert.that(isValid(), "check fast_aaccess_0"); |
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46 } |
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47 } |
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48 |
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49 public boolean isValid() { |
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50 return code() == Bytecodes._fast_aaccess_0; |
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51 } |
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52 |
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53 public static BytecodeFastAAccess0 at(Method method, int bci) { |
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54 BytecodeFastAAccess0 b = new BytecodeFastAAccess0(method, bci); |
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55 if (Assert.ASSERTS_ENABLED) { |
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56 b.verify(); |
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57 } |
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58 return b; |
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59 } |
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60 |
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61 /** Like at, but returns null if the BCI is not at fast_aaccess_0 */ |
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62 public static BytecodeFastAAccess0 atCheck(Method method, int bci) { |
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63 BytecodeFastAAccess0 b = new BytecodeFastAAccess0(method, bci); |
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64 return (b.isValid() ? b : null); |
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65 } |
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66 |
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67 public static BytecodeFastAAccess0 at(BytecodeStream bcs) { |
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68 return new BytecodeFastAAccess0(bcs.method(), bcs.bci()); |
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69 } |
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70 |
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71 public String toString() { |
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72 StringBuffer buf = new StringBuffer(); |
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73 buf.append("aload_0"); |
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74 buf.append(spaces); |
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75 buf.append(super.toString()); |
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76 return buf.toString(); |
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77 } |
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78 } |
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