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_MIPS_QUICK_METHOD_FRAME_INFO_MIPS_H_ 18 #define ART_RUNTIME_ARCH_MIPS_QUICK_METHOD_FRAME_INFO_MIPS_H_ 19 20 #include "arch/instruction_set.h" 21 #include "base/bit_utils.h" 22 #include "base/callee_save_type.h" 23 #include "base/enums.h" 24 #include "quick/quick_method_frame_info.h" 25 #include "registers_mips.h" 26 27 namespace art { 28 namespace mips { 29 30 static constexpr uint32_t kMipsCalleeSaveAlwaysSpills = 31 (1u << art::mips::RA); 32 static constexpr uint32_t kMipsCalleeSaveRefSpills = 33 (1 << art::mips::S2) | (1 << art::mips::S3) | (1 << art::mips::S4) | (1 << art::mips::S5) | 34 (1 << art::mips::S6) | (1 << art::mips::S7) | (1 << art::mips::GP) | (1 << art::mips::FP); 35 static constexpr uint32_t kMipsCalleeSaveArgSpills = 36 (1 << art::mips::A1) | (1 << art::mips::A2) | (1 << art::mips::A3) | (1 << art::mips::T0) | 37 (1 << art::mips::T1); 38 // We want to save all floating point register pairs at addresses 39 // which are multiples of 8 so that we can eliminate use of the 40 // SDu/LDu macros by using sdc1/ldc1 to store/load floating 41 // register values using a single instruction. Because integer 42 // registers are stored at the top of the frame, to achieve having 43 // the floating point register pairs aligned on multiples of 8 the 44 // number of integer registers saved must be even. Previously, the 45 // only case in which we saved floating point registers beneath an 46 // odd number of integer registers was when "type" is 47 // CalleeSaveType::kSaveAllCalleeSaves. (There are other cases in 48 // which an odd number of integer registers are saved but those 49 // cases don't save any floating point registers. If no floating 50 // point registers are saved we don't care if the number of integer 51 // registers saved is odd or even). To save an even number of 52 // integer registers in this particular case we add the ZERO 53 // register to the list of registers which get saved. 54 static constexpr uint32_t kMipsCalleeSaveAllSpills = 55 (1 << art::mips::ZERO) | (1 << art::mips::S0) | (1 << art::mips::S1); 56 static constexpr uint32_t kMipsCalleeSaveEverythingSpills = 57 (1 << art::mips::AT) | (1 << art::mips::V0) | (1 << art::mips::V1) | 58 (1 << art::mips::A0) | (1 << art::mips::A1) | (1 << art::mips::A2) | (1 << art::mips::A3) | 59 (1 << art::mips::T0) | (1 << art::mips::T1) | (1 << art::mips::T2) | (1 << art::mips::T3) | 60 (1 << art::mips::T4) | (1 << art::mips::T5) | (1 << art::mips::T6) | (1 << art::mips::T7) | 61 (1 << art::mips::S0) | (1 << art::mips::S1) | (1 << art::mips::T8) | (1 << art::mips::T9); 62 63 static constexpr uint32_t kMipsCalleeSaveFpAlwaysSpills = 0; 64 static constexpr uint32_t kMipsCalleeSaveFpRefSpills = 0; 65 static constexpr uint32_t kMipsCalleeSaveFpArgSpills = 66 (1 << art::mips::F8) | (1 << art::mips::F9) | (1 << art::mips::F10) | (1 << art::mips::F11) | 67 (1 << art::mips::F12) | (1 << art::mips::F13) | (1 << art::mips::F14) | (1 << art::mips::F15) | 68 (1 << art::mips::F16) | (1 << art::mips::F17) | (1 << art::mips::F18) | (1 << art::mips::F19); 69 static constexpr uint32_t kMipsCalleeSaveAllFPSpills = 70 (1 << art::mips::F20) | (1 << art::mips::F21) | (1 << art::mips::F22) | (1 << art::mips::F23) | 71 (1 << art::mips::F24) | (1 << art::mips::F25) | (1 << art::mips::F26) | (1 << art::mips::F27) | 72 (1 << art::mips::F28) | (1 << art::mips::F29) | (1 << art::mips::F30) | (1u << art::mips::F31); 73 static constexpr uint32_t kMipsCalleeSaveFpEverythingSpills = 74 (1 << art::mips::F0) | (1 << art::mips::F1) | (1 << art::mips::F2) | (1 << art::mips::F3) | 75 (1 << art::mips::F4) | (1 << art::mips::F5) | (1 << art::mips::F6) | (1 << art::mips::F7) | 76 (1 << art::mips::F8) | (1 << art::mips::F9) | (1 << art::mips::F10) | (1 << art::mips::F11) | 77 (1 << art::mips::F12) | (1 << art::mips::F13) | (1 << art::mips::F14) | (1 << art::mips::F15) | 78 (1 << art::mips::F16) | (1 << art::mips::F17) | (1 << art::mips::F18) | (1 << art::mips::F19) | 79 (1 << art::mips::F20) | (1 << art::mips::F21) | (1 << art::mips::F22) | (1 << art::mips::F23) | 80 (1 << art::mips::F24) | (1 << art::mips::F25) | (1 << art::mips::F26) | (1 << art::mips::F27) | 81 (1 << art::mips::F28) | (1 << art::mips::F29) | (1 << art::mips::F30) | (1u << art::mips::F31); 82 MipsCalleeSaveCoreSpills(CalleeSaveType type)83constexpr uint32_t MipsCalleeSaveCoreSpills(CalleeSaveType type) { 84 type = GetCanonicalCalleeSaveType(type); 85 return kMipsCalleeSaveAlwaysSpills | kMipsCalleeSaveRefSpills | 86 (type == CalleeSaveType::kSaveRefsAndArgs ? kMipsCalleeSaveArgSpills : 0) | 87 (type == CalleeSaveType::kSaveAllCalleeSaves ? kMipsCalleeSaveAllSpills : 0) | 88 (type == CalleeSaveType::kSaveEverything ? kMipsCalleeSaveEverythingSpills : 0); 89 } 90 MipsCalleeSaveFPSpills(CalleeSaveType type)91constexpr uint32_t MipsCalleeSaveFPSpills(CalleeSaveType type) { 92 type = GetCanonicalCalleeSaveType(type); 93 return kMipsCalleeSaveFpAlwaysSpills | kMipsCalleeSaveFpRefSpills | 94 (type == CalleeSaveType::kSaveRefsAndArgs ? kMipsCalleeSaveFpArgSpills : 0) | 95 (type == CalleeSaveType::kSaveAllCalleeSaves ? kMipsCalleeSaveAllFPSpills : 0) | 96 (type == CalleeSaveType::kSaveEverything ? kMipsCalleeSaveFpEverythingSpills : 0); 97 } 98 MipsCalleeSaveFrameSize(CalleeSaveType type)99constexpr uint32_t MipsCalleeSaveFrameSize(CalleeSaveType type) { 100 type = GetCanonicalCalleeSaveType(type); 101 return RoundUp((POPCOUNT(MipsCalleeSaveCoreSpills(type)) /* gprs */ + 102 POPCOUNT(MipsCalleeSaveFPSpills(type)) /* fprs */ + 103 1 /* Method* */) * static_cast<size_t>(kMipsPointerSize), kStackAlignment); 104 } 105 MipsCalleeSaveMethodFrameInfo(CalleeSaveType type)106constexpr QuickMethodFrameInfo MipsCalleeSaveMethodFrameInfo(CalleeSaveType type) { 107 type = GetCanonicalCalleeSaveType(type); 108 return QuickMethodFrameInfo(MipsCalleeSaveFrameSize(type), 109 MipsCalleeSaveCoreSpills(type), 110 MipsCalleeSaveFPSpills(type)); 111 } 112 113 } // namespace mips 114 } // namespace art 115 116 #endif // ART_RUNTIME_ARCH_MIPS_QUICK_METHOD_FRAME_INFO_MIPS_H_ 117