1 /** 2 * Copyright (c) 2021-2022 Huawei Device Co., Ltd. 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 16 #ifndef PANDA_BYTECODE_OPTIMIZER_BYTECODE_ENCODER_H 17 #define PANDA_BYTECODE_OPTIMIZER_BYTECODE_ENCODER_H 18 19 #include <stdint.h> 20 21 #include "compiler/optimizer/code_generator/encode.h" 22 23 namespace panda::bytecodeopt { 24 class BytecodeEncoder final : public compiler::Encoder { 25 public: BytecodeEncoder(ArenaAllocator * allocator)26 explicit BytecodeEncoder(ArenaAllocator *allocator) : Encoder(allocator, Arch::NONE) {} 27 Finalize()28 void Finalize() override {}; 29 CanEncodeImmHelper(int64_t imm,uint32_t size,int64_t min,int64_t max)30 static bool CanEncodeImmHelper(int64_t imm, uint32_t size, int64_t min, int64_t max) 31 { 32 constexpr uint8_t HALF_SIZE = 32; 33 if (size != HALF_SIZE) { 34 return false; 35 } 36 37 return imm >= min && imm <= max; 38 } 39 CanEncodeImmAddSubCmp(int64_t imm,uint32_t size,bool signed_compare)40 bool CanEncodeImmAddSubCmp(int64_t imm, uint32_t size, [[maybe_unused]] bool signed_compare) override 41 { 42 return CanEncodeImmHelper(imm, size, INT8_MIN, INT8_MAX); 43 } 44 CanEncodeImmMulDivMod(uint64_t imm,uint32_t size)45 bool CanEncodeImmMulDivMod(uint64_t imm, uint32_t size) override 46 { 47 return CanEncodeImmAddSubCmp(imm, size, false); 48 } 49 CanEncodeImmLogical(uint64_t imm,uint32_t size)50 bool CanEncodeImmLogical(uint64_t imm, uint32_t size) override 51 { 52 return CanEncodeImmHelper(imm, size, INT32_MIN, INT32_MAX); 53 } 54 CanEncodeShift(uint32_t size)55 bool CanEncodeShift(uint32_t size) override 56 { 57 constexpr uint32_t UNSUPPORTED_SHIFT_SIZE = 64; 58 return size != UNSUPPORTED_SHIFT_SIZE; 59 } GetLabelAddress(compiler::LabelHolder::LabelId)60 size_t GetLabelAddress(compiler::LabelHolder::LabelId) override 61 { 62 return 0; 63 } LabelHasLinks(compiler::LabelHolder::LabelId)64 bool LabelHasLinks(compiler::LabelHolder::LabelId) override 65 { 66 return false; 67 } 68 }; // BytecodeEncoder 69 } // namespace panda::bytecodeopt 70 71 #endif // PANDA_BYTECODE_OPTIMIZER_BYTECODE_ENCODER_H 72