1/*
2 * Copyright (C) 2014 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_ARCH_ARM_QUICK_METHOD_FRAME_INFO_ARM_H_
18#define ART_RUNTIME_ARCH_ARM_QUICK_METHOD_FRAME_INFO_ARM_H_
19
20#include "base/bit_utils.h"
21#include "quick/quick_method_frame_info.h"
22#include "registers_arm.h"
23#include "runtime.h"  // for Runtime::CalleeSaveType.
24
25namespace art {
26namespace arm {
27
28static constexpr uint32_t kArmCalleeSaveAlwaysSpills =
29    (1 << art::arm::LR);
30static constexpr uint32_t kArmCalleeSaveRefSpills =
31    (1 << art::arm::R5) | (1 << art::arm::R6)  | (1 << art::arm::R7) | (1 << art::arm::R8) |
32    (1 << art::arm::R10) | (1 << art::arm::R11);
33static constexpr uint32_t kArmCalleeSaveArgSpills =
34    (1 << art::arm::R1) | (1 << art::arm::R2) | (1 << art::arm::R3);
35static constexpr uint32_t kArmCalleeSaveAllSpills =
36    (1 << art::arm::R4) | (1 << art::arm::R9);
37
38static constexpr uint32_t kArmCalleeSaveFpAlwaysSpills = 0;
39static constexpr uint32_t kArmCalleeSaveFpRefSpills = 0;
40static constexpr uint32_t kArmCalleeSaveFpArgSpills =
41    (1 << art::arm::S0)  | (1 << art::arm::S1)  | (1 << art::arm::S2)  | (1 << art::arm::S3)  |
42    (1 << art::arm::S4)  | (1 << art::arm::S5)  | (1 << art::arm::S6)  | (1 << art::arm::S7)  |
43    (1 << art::arm::S8)  | (1 << art::arm::S9)  | (1 << art::arm::S10) | (1 << art::arm::S11) |
44    (1 << art::arm::S12) | (1 << art::arm::S13) | (1 << art::arm::S14) | (1 << art::arm::S15);
45static constexpr uint32_t kArmCalleeSaveFpAllSpills =
46    (1 << art::arm::S16) | (1 << art::arm::S17) | (1 << art::arm::S18) | (1 << art::arm::S19) |
47    (1 << art::arm::S20) | (1 << art::arm::S21) | (1 << art::arm::S22) | (1 << art::arm::S23) |
48    (1 << art::arm::S24) | (1 << art::arm::S25) | (1 << art::arm::S26) | (1 << art::arm::S27) |
49    (1 << art::arm::S28) | (1 << art::arm::S29) | (1 << art::arm::S30) | (1 << art::arm::S31);
50
51constexpr uint32_t ArmCalleeSaveCoreSpills(Runtime::CalleeSaveType type) {
52  return kArmCalleeSaveAlwaysSpills | kArmCalleeSaveRefSpills |
53      (type == Runtime::kRefsAndArgs ? kArmCalleeSaveArgSpills : 0) |
54      (type == Runtime::kSaveAll ? kArmCalleeSaveAllSpills : 0);
55}
56
57constexpr uint32_t ArmCalleeSaveFpSpills(Runtime::CalleeSaveType type) {
58  return kArmCalleeSaveFpAlwaysSpills | kArmCalleeSaveFpRefSpills |
59      (type == Runtime::kRefsAndArgs ? kArmCalleeSaveFpArgSpills: 0) |
60      (type == Runtime::kSaveAll ? kArmCalleeSaveFpAllSpills : 0);
61}
62
63constexpr uint32_t ArmCalleeSaveFrameSize(Runtime::CalleeSaveType type) {
64  return RoundUp((POPCOUNT(ArmCalleeSaveCoreSpills(type)) /* gprs */ +
65                  POPCOUNT(ArmCalleeSaveFpSpills(type)) /* fprs */ +
66                  1 /* Method* */) * kArmPointerSize, kStackAlignment);
67}
68
69constexpr QuickMethodFrameInfo ArmCalleeSaveMethodFrameInfo(Runtime::CalleeSaveType type) {
70  return QuickMethodFrameInfo(ArmCalleeSaveFrameSize(type),
71                              ArmCalleeSaveCoreSpills(type),
72                              ArmCalleeSaveFpSpills(type));
73}
74
75constexpr size_t ArmCalleeSaveFpr1Offset(Runtime::CalleeSaveType type) {
76  return ArmCalleeSaveFrameSize(type) -
77         (POPCOUNT(ArmCalleeSaveCoreSpills(type)) +
78          POPCOUNT(ArmCalleeSaveFpSpills(type))) * kArmPointerSize;
79}
80
81constexpr size_t ArmCalleeSaveGpr1Offset(Runtime::CalleeSaveType type) {
82  return ArmCalleeSaveFrameSize(type) -
83         POPCOUNT(ArmCalleeSaveCoreSpills(type)) * kArmPointerSize;
84}
85
86constexpr size_t ArmCalleeSaveLrOffset(Runtime::CalleeSaveType type) {
87  return ArmCalleeSaveFrameSize(type) -
88      POPCOUNT(ArmCalleeSaveCoreSpills(type) & (-(1 << LR))) * kArmPointerSize;
89}
90
91}  // namespace arm
92}  // namespace art
93
94#endif  // ART_RUNTIME_ARCH_ARM_QUICK_METHOD_FRAME_INFO_ARM_H_
95