1 /* 2 * Copyright (c) 2002, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 package sun.jvm.hotspot.interpreter; 26 27 import sun.jvm.hotspot.oops.*; 28 import sun.jvm.hotspot.utilities.*; 29 30 public class BytecodeFastIAccess0 extends BytecodeGetPut { 31 BytecodeFastIAccess0(Method method, int bci) { 32 super(method, bci); 33 } 34 35 public int index() { 36 return (int) (0xFF & javaShortAt(2)); 37 } 38 39 public boolean isStatic() { 40 return false; 41 } 42 43 public void verify() { 44 if (Assert.ASSERTS_ENABLED) { 45 Assert.that(isValid(), "check fast_iaccess_0"); 46 } 47 } 48 49 public boolean isValid() { 50 return code() == Bytecodes._fast_iaccess_0; 51 } 52 53 public static BytecodeFastIAccess0 at(Method method, int bci) { 54 BytecodeFastIAccess0 b = new BytecodeFastIAccess0(method, bci); 55 if (Assert.ASSERTS_ENABLED) { 56 b.verify(); 57 } 58 return b; 59 } 60 61 /** Like at, but returns null if the BCI is not at fast_iaccess_0 */ 62 public static BytecodeFastIAccess0 atCheck(Method method, int bci) { 63 BytecodeFastIAccess0 b = new BytecodeFastIAccess0(method, bci); 64 return (b.isValid() ? b : null); 65 } 66 67 public static BytecodeFastIAccess0 at(BytecodeStream bcs) { 68 return new BytecodeFastIAccess0(bcs.method(), bcs.bci()); 69 } 70 71 public String toString() { 72 StringBuffer buf = new StringBuffer(); 73 buf.append("aload_0"); 74 buf.append(spaces); 75 buf.append(super.toString()); 76 return buf.toString(); 77 } 78 }