1 /*
2 * Copyright (C) 2017 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_RUNTIME_BASE_CALLEE_SAVE_TYPE_H_
18 #define ART_RUNTIME_BASE_CALLEE_SAVE_TYPE_H_
19
20 #include <cstdint>
21 #include <iosfwd>
22
23 namespace art {
24
25 // Returns a special method that describes all callee saves being spilled to the stack.
26 enum class CalleeSaveType : uint32_t {
27 kSaveAllCalleeSaves, // All callee-save registers.
28 kSaveRefsOnly, // Only those callee-save registers that can hold references.
29 kSaveRefsAndArgs, // References (see above) and arguments (usually caller-save registers).
30 kSaveEverything, // All registers, including both callee-save and caller-save.
31 kSaveEverythingForClinit, // Special kSaveEverything for clinit.
32 kSaveEverythingForSuspendCheck, // Special kSaveEverything for suspend check.
33 kLastCalleeSaveType // Value used for iteration.
34 };
35 std::ostream& operator<<(std::ostream& os, const CalleeSaveType& rhs);
36
GetCanonicalCalleeSaveType(CalleeSaveType type)37 static inline constexpr CalleeSaveType GetCanonicalCalleeSaveType(CalleeSaveType type) {
38 if (type == CalleeSaveType::kSaveEverythingForClinit ||
39 type == CalleeSaveType::kSaveEverythingForSuspendCheck) {
40 return CalleeSaveType::kSaveEverything;
41 }
42 return type;
43 }
44
45 } // namespace art
46
47 #endif // ART_RUNTIME_BASE_CALLEE_SAVE_TYPE_H_
48