1f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project/* 2f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Copyright (C) 2007 The Android Open Source Project 3f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 4f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Licensed under the Apache License, Version 2.0 (the "License"); 5f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * you may not use this file except in compliance with the License. 6f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * You may obtain a copy of the License at 7f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 8f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * http://www.apache.org/licenses/LICENSE-2.0 9f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 10f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Unless required by applicable law or agreed to in writing, software 11f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * distributed under the License is distributed on an "AS IS" BASIS, 12f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * See the License for the specific language governing permissions and 14f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * limitations under the License. 15f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 16f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 17f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectpackage com.android.dx.rop.cst; 18f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 19f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project/** 20f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Constants which are literal bitwise values of some sort. 21f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 22f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectpublic abstract class CstLiteralBits 23f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project extends TypedConstant { 24f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /** 25f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Returns whether or not this instance's value may be accurately 2699409883d9c4c0ffb49b070ce307bb33a9dfe9f1The Android Open Source Project * represented as an {@code int}. The rule is that if there 2799409883d9c4c0ffb49b070ce307bb33a9dfe9f1The Android Open Source Project * is an {@code int} which may be sign-extended to yield this 2899409883d9c4c0ffb49b070ce307bb33a9dfe9f1The Android Open Source Project * instance's value, then this method returns {@code true}. 2999409883d9c4c0ffb49b070ce307bb33a9dfe9f1The Android Open Source Project * Otherwise, it returns {@code false}. 30f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 3199409883d9c4c0ffb49b070ce307bb33a9dfe9f1The Android Open Source Project * @return {@code true} iff this instance fits in an {@code int} 32f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 33f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project public abstract boolean fitsInInt(); 34f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 35f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /** 3699409883d9c4c0ffb49b070ce307bb33a9dfe9f1The Android Open Source Project * Gets the value as {@code int} bits. If this instance contains 3799409883d9c4c0ffb49b070ce307bb33a9dfe9f1The Android Open Source Project * more bits than fit in an {@code int}, then this returns only 38f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * the low-order bits. 39f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 40f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * @return the bits 41f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 42f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project public abstract int getIntBits(); 43f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 44f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /** 4599409883d9c4c0ffb49b070ce307bb33a9dfe9f1The Android Open Source Project * Gets the value as {@code long} bits. If this instance contains 4699409883d9c4c0ffb49b070ce307bb33a9dfe9f1The Android Open Source Project * fewer bits than fit in a {@code long}, then the result of this 47f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * method is the sign extension of the value. 48de75089fb7216d19e9c22cce4dc62a49513477d3Carl Shapiro * 49f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * @return the bits 50f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 51f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project public abstract long getLongBits(); 52f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 53f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /** 54f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Returns true if this value can fit in 16 bits with sign-extension. 55f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 56f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * @return true if the sign-extended lower 16 bits are the same as 57f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * the value. 58f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 59f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project public boolean fitsIn16Bits() { 60f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (! fitsInInt()) { 61f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project return false; 62f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 63de75089fb7216d19e9c22cce4dc62a49513477d3Carl Shapiro 64f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project int bits = getIntBits(); 65f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project return (short) bits == bits; 66f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 67f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 68f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /** 69f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Returns true if this value can fit in 8 bits with sign-extension. 70f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 71f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * @return true if the sign-extended lower 8 bits are the same as 72f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * the value. 73f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 74f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project public boolean fitsIn8Bits() { 75f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (! fitsInInt()) { 76f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project return false; 77f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 78f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 79f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project int bits = getIntBits(); 80f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project return (byte) bits == bits; 81f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 82f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project} 83