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      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 "base/bit_utils.h"
     21 #include "quick/quick_method_frame_info.h"
     22 #include "registers_mips.h"
     23 #include "runtime.h"  // for Runtime::CalleeSaveType.
     24 
     25 namespace art {
     26 namespace mips {
     27 
     28 static constexpr uint32_t kMipsCalleeSaveRefSpills =
     29     (1 << art::mips::S2) | (1 << art::mips::S3) | (1 << art::mips::S4) | (1 << art::mips::S5) |
     30     (1 << art::mips::S6) | (1 << art::mips::S7) | (1 << art::mips::GP) | (1 << art::mips::FP);
     31 static constexpr uint32_t kMipsCalleeSaveArgSpills =
     32     (1 << art::mips::A1) | (1 << art::mips::A2) | (1 << art::mips::A3);
     33 static constexpr uint32_t kMipsCalleeSaveAllSpills =
     34     (1 << art::mips::S0) | (1 << art::mips::S1);
     35 static constexpr uint32_t kMipsCalleeSaveAllFPSpills =
     36     (1 << art::mips::F20) | (1 << art::mips::F21) | (1 << art::mips::F22) | (1 << art::mips::F23) |
     37     (1 << art::mips::F24) | (1 << art::mips::F25) | (1 << art::mips::F26) | (1 << art::mips::F27) |
     38     (1 << art::mips::F28) | (1 << art::mips::F29) | (1 << art::mips::F30) | (1 << art::mips::F31);
     39 
     40 constexpr uint32_t MipsCalleeSaveCoreSpills(Runtime::CalleeSaveType type) {
     41   return kMipsCalleeSaveRefSpills |
     42       (type == Runtime::kRefsAndArgs ? kMipsCalleeSaveArgSpills : 0) |
     43       (type == Runtime::kSaveAll ? kMipsCalleeSaveAllSpills : 0) | (1 << art::mips::RA);
     44 }
     45 
     46 constexpr uint32_t MipsCalleeSaveFPSpills(Runtime::CalleeSaveType type) {
     47   return type == Runtime::kSaveAll ? kMipsCalleeSaveAllFPSpills : 0;
     48 }
     49 
     50 constexpr uint32_t MipsCalleeSaveFrameSize(Runtime::CalleeSaveType type) {
     51   return RoundUp((POPCOUNT(MipsCalleeSaveCoreSpills(type)) /* gprs */ +
     52                   POPCOUNT(MipsCalleeSaveFPSpills(type))   /* fprs */ +
     53                   1 /* Method* */) * kMipsPointerSize, kStackAlignment);
     54 }
     55 
     56 constexpr QuickMethodFrameInfo MipsCalleeSaveMethodFrameInfo(Runtime::CalleeSaveType type) {
     57   return QuickMethodFrameInfo(MipsCalleeSaveFrameSize(type),
     58                               MipsCalleeSaveCoreSpills(type),
     59                               MipsCalleeSaveFPSpills(type));
     60 }
     61 
     62 }  // namespace mips
     63 }  // namespace art
     64 
     65 #endif  // ART_RUNTIME_ARCH_MIPS_QUICK_METHOD_FRAME_INFO_MIPS_H_
     66