1579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson/* 2579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * Copyright (C) 2007 The Android Open Source Project 3579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * 4579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * Licensed under the Apache License, Version 2.0 (the "License"); 5579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * you may not use this file except in compliance with the License. 6579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * You may obtain a copy of the License at 7579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * 8579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * http://www.apache.org/licenses/LICENSE-2.0 9579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * 10579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * Unless required by applicable law or agreed to in writing, software 11579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * distributed under the License is distributed on an "AS IS" BASIS, 12579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * See the License for the specific language governing permissions and 14579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * limitations under the License. 15579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson */ 16579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 17579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilsonpackage com.android.dx.rop.code; 18579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 19579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson/** 20579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * Implementation of {@link TranslationAdvice} which conservatively answers 21579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * {@code false} to all methods. 22579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson */ 23579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilsonpublic final class ConservativeTranslationAdvice 24579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson implements TranslationAdvice { 25579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson /** {@code non-null;} standard instance of this class */ 26579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final ConservativeTranslationAdvice THE_ONE = 27579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson new ConservativeTranslationAdvice(); 28579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 29579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson /** 30579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * This class is not publicly instantiable. Use {@link #THE_ONE}. 31579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson */ 32579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson private ConservativeTranslationAdvice() { 33579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson // This space intentionally left blank. 34579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson } 35579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 36579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson /** {@inheritDoc} */ 37579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public boolean hasConstantOperation(Rop opcode, 38579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson RegisterSpec sourceA, RegisterSpec sourceB) { 39579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson return false; 40579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson } 41579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 42579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson /** {@inheritDoc} */ 43579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public boolean requiresSourcesInOrder(Rop opcode, 44579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson RegisterSpecList sources) { 45579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson return false; 46579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson } 47579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 48579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson /** {@inheritDoc} */ 49579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public int getMaxOptimalRegisterCount() { 50579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson return Integer.MAX_VALUE; 51579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson } 52579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson} 53