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)37 template <typename T> T AbsOrMin(T value) {
38 return (value == std::numeric_limits<T>::min())
39 ? value
40 : std::abs(value);
41 }
42
43 // Check whether the i-th operand of instr is non-negative.
44 bool HasNonNegativeInputAt(HInstruction* instr, size_t i);
45
46 // Check whether the i-th operand of instr is non-negative or the minimum integer value.
47 bool HasNonNegativeOrMinIntInputAt(HInstruction* instr, size_t i);
48
49 } // namespace art
50
51 #endif // ART_COMPILER_OPTIMIZING_CODE_GENERATOR_UTILS_H_
52