quick_method_frame_info_arm64.h revision b551fdcda9eb128c80de37c4fb978968bec6d4b3 
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_ARM64_QUICK_METHOD_FRAME_INFO_ARM64_H_
18#define ART_RUNTIME_ARCH_ARM64_QUICK_METHOD_FRAME_INFO_ARM64_H_
19
20#include "quick/quick_method_frame_info.h"
21#include "registers_arm64.h"
22#include "runtime.h"  // for Runtime::CalleeSaveType.
23#include "utils.h"  // for POPCOUNT
24
25namespace art {
26namespace arm64 {
27
28// Registers need to be restored but not preserved by aapcs64.
29static constexpr uint32_t kArm64CalleeSaveAlwaysSpills =
30    // Note: ArtMethod::GetReturnPcOffsetInBytes() rely on the assumption that
31    // LR is always saved on the top of the frame for all targets.
32    // That is, lr = *(sp + framesize - pointsize).
33    (1 << art::arm64::LR);
34// Callee saved registers
35static constexpr uint32_t kArm64CalleeSaveRefSpills =
36    (1 << art::arm64::X20) | (1 << art::arm64::X21) | (1 << art::arm64::X22) |
37    (1 << art::arm64::X23) | (1 << art::arm64::X24) | (1 << art::arm64::X25) |
38    (1 << art::arm64::X26) | (1 << art::arm64::X27) | (1 << art::arm64::X28) |
39    (1 << art::arm64::X29);
40// X0 is the method pointer. Not saved.
41static constexpr uint32_t kArm64CalleeSaveArgSpills =
42    (1 << art::arm64::X1) | (1 << art::arm64::X2) | (1 << art::arm64::X3) |
43    (1 << art::arm64::X4) | (1 << art::arm64::X5) | (1 << art::arm64::X6) |
44    (1 << art::arm64::X7);
45static constexpr uint32_t kArm64CalleeSaveAllSpills =
46    // Thread register.
47    (1 << art::arm64::X18) |
48    // Suspend register.
49    1 << art::arm64::X19;
50
51static constexpr uint32_t kArm64CalleeSaveFpAlwaysSpills = 0;
52static constexpr uint32_t kArm64CalleeSaveFpRefSpills = 0;
53static constexpr uint32_t kArm64CalleeSaveFpArgSpills =
54    (1 << art::arm64::D0) | (1 << art::arm64::D1) | (1 << art::arm64::D2) |
55    (1 << art::arm64::D3) | (1 << art::arm64::D4) | (1 << art::arm64::D5) |
56    (1 << art::arm64::D6) | (1 << art::arm64::D7);
57static constexpr uint32_t kArm64FpAllSpills =
58    (1 << art::arm64::D8)  | (1 << art::arm64::D9)  | (1 << art::arm64::D10) |
59    (1 << art::arm64::D11)  | (1 << art::arm64::D12)  | (1 << art::arm64::D13) |
60    (1 << art::arm64::D14)  | (1 << art::arm64::D15);
61
62constexpr uint32_t Arm64CalleeSaveCoreSpills(Runtime::CalleeSaveType type) {
63  return kArm64CalleeSaveAlwaysSpills | kArm64CalleeSaveRefSpills |
64      (type == Runtime::kRefsAndArgs ? kArm64CalleeSaveArgSpills : 0) |
65      (type == Runtime::kSaveAll ? kArm64CalleeSaveAllSpills : 0);
66}
67
68constexpr uint32_t Arm64CalleeSaveFpSpills(Runtime::CalleeSaveType type) {
69  return kArm64CalleeSaveFpAlwaysSpills | kArm64CalleeSaveFpRefSpills |
70      (type == Runtime::kRefsAndArgs ? kArm64CalleeSaveFpArgSpills: 0) |
71      (type == Runtime::kSaveAll ? kArm64FpAllSpills : 0);
72}
73
74constexpr uint32_t Arm64CalleeSaveFrameSize(Runtime::CalleeSaveType type) {
75  return RoundUp((POPCOUNT(Arm64CalleeSaveCoreSpills(type)) /* gprs */ +
76                  POPCOUNT(Arm64CalleeSaveFpSpills(type)) /* fprs */ +
77                  1 /* Method* */) * kArm64PointerSize, kStackAlignment);
78}
79
80constexpr QuickMethodFrameInfo Arm64CalleeSaveMethodFrameInfo(Runtime::CalleeSaveType type) {
81  return QuickMethodFrameInfo(Arm64CalleeSaveFrameSize(type),
82                              Arm64CalleeSaveCoreSpills(type),
83                              Arm64CalleeSaveFpSpills(type));
84}
85
86constexpr size_t Arm64CalleeSaveFpr1Offset(Runtime::CalleeSaveType type) {
87  return Arm64CalleeSaveFrameSize(type) -
88         (POPCOUNT(Arm64CalleeSaveCoreSpills(type)) +
89          POPCOUNT(Arm64CalleeSaveFpSpills(type))) * kArm64PointerSize;
90}
91
92constexpr size_t Arm64CalleeSaveGpr1Offset(Runtime::CalleeSaveType type) {
93  return Arm64CalleeSaveFrameSize(type) -
94         POPCOUNT(Arm64CalleeSaveCoreSpills(type)) * kArm64PointerSize;
95}
96
97constexpr size_t Arm64CalleeSaveLrOffset(Runtime::CalleeSaveType type) {
98  return Arm64CalleeSaveFrameSize(type) -
99      POPCOUNT(Arm64CalleeSaveCoreSpills(type) & (-(1 << LR))) * kArm64PointerSize;
100}
101
102}  // namespace arm64
103}  // namespace art
104
105#endif  // ART_RUNTIME_ARCH_ARM64_QUICK_METHOD_FRAME_INFO_ARM64_H_
106