1 /* 2 * Copyright (C) 2015 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef ART_COMPILER_OPTIMIZING_CODE_GENERATOR_UTILS_H_ 18 #define ART_COMPILER_OPTIMIZING_CODE_GENERATOR_UTILS_H_ 19 20 #include <cstdint> 21 #include <cstdlib> 22 #include <limits> 23 24 namespace art { 25 26 class HInstruction; 27 28 // Computes the magic number and the shift needed in the div/rem by constant algorithm, as out 29 // arguments `magic` and `shift` 30 void CalculateMagicAndShiftForDivRem(int64_t divisor, bool is_long, int64_t* magic, int* shift); 31 32 // Returns true if `cond_input` is expected to have a location. Assumes that 33 // `cond_input` is a conditional input of the currently emitted instruction and 34 // that it has been previously visited by the InstructionCodeGenerator. 35 bool IsBooleanValueOrMaterializedCondition(HInstruction* cond_input); 36 AbsOrMin(T value)37template <typename T> T AbsOrMin(T value) { 38 return (value == std::numeric_limits<T>::min()) 39 ? value 40 : std::abs(value); 41 } 42 43 // Return true if the specified instruction produces only non-negative results or the min value of 44 // the integral type if the instruction has the integral type. 45 bool HasNonNegativeResultOrMinInt(HInstruction* instruction); 46 47 } // namespace art 48 49 #endif // ART_COMPILER_OPTIMIZING_CODE_GENERATOR_UTILS_H_ 50