/* * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance * with the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, * software distributed under the License is distributed on an * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY * KIND, either express or implied. See the License for the * specific language governing permissions and limitations * under the License. */ /*! * \file codegen_stack_vm.h * \brief Codegen into Simple Stack VM. */ #ifndef TVM_TARGET_STACKVM_CODEGEN_STACKVM_H_ #define TVM_TARGET_STACKVM_CODEGEN_STACKVM_H_ #include <tvm/tir/expr.h> #include <tvm/tir/stmt_functor.h> #include <tvm/tir/lowered_func.h> #include <tvm/target/codegen.h> #include <string> #include <vector> #include <unordered_map> #include "../../runtime/stackvm/stackvm.h" namespace tvm { namespace codegen { using namespace tir; using runtime::StackVM; /*! * \brief A base class to generate a stack VM. * This module is used to generate host wrapper * into device function when only device JIT is available. */ class CodeGenStackVM : public ExprFunctor<void(const PrimExpr&)>, public StmtFunctor<void(const Stmt&)> { public: /*! * \brief Generate a stack VM representing * \param f The function to be compiled * \param device_funcs The extern device functions to be linked. * \note Only call compile once, * create a new codegen object each time. */ StackVM Compile(LoweredFunc f); /*! \brief Push stmt to generate new code */ void Push(const Stmt& n); /*! \brief Push expr to generate new code */ void Push(const PrimExpr& n) { VisitExpr(n); } /*! * \brief Push the opcode to the code. * \param opcode The code to be pushed. */ void PushOp(StackVM::OpCode opcode); /*! * \brief Push the opcode and operand to the code. * \param opcode The opcode. * \param operand The operand to be pushed. * \return operand_index, indicating location of operand */ int64_t PushOp(StackVM::OpCode opcode, int operand); /*! * \brief Set the relative jump offset to be offset. * \param operand_index The indexed returned by PushOp. * \param operand The operand to be set. */ void SetOperand(int64_t operand_index, int64_t operand); /*! \return The current program pointer */ int64_t GetPC() const { return static_cast<int64_t>(vm_.code.size()); } /*! * \brief Get string id in vm * \param key The string to get id. * \return the id of the string. */ int GetStrID(const std::string& key); /*! * \brief Allocate a variable name for a newly defined var. * \param v The variable. * \return the heap index of the var. */ int AllocVarID(const VarNode* v); /*! * \brief Get a variable name. * \param v The variable. * \return the heap index of the var. */ int GetVarID(const VarNode* v) const; // Push binary operator void PushBinary(StackVM::OpCode op_int64, const PrimExpr& a, const PrimExpr& b); // push cast; void PushCast(DataType dst, DataType src); // overloadable functions // expression void VisitExpr_(const VarNode* op) final; void VisitExpr_(const LoadNode* op) final; void VisitExpr_(const LetNode* op) final; void VisitExpr_(const CallNode* op) final; void VisitExpr_(const AddNode* op) final; void VisitExpr_(const SubNode* op) final; void VisitExpr_(const MulNode* op) final; void VisitExpr_(const DivNode* op) final; void VisitExpr_(const ModNode* op) final; void VisitExpr_(const MinNode* op) final; void VisitExpr_(const MaxNode* op) final; void VisitExpr_(const EQNode* op) final; void VisitExpr_(const NENode* op) final; void VisitExpr_(const LTNode* op) final; void VisitExpr_(const LENode* op) final; void VisitExpr_(const GTNode* op) final; void VisitExpr_(const GENode* op) final; void VisitExpr_(const AndNode* op) final; void VisitExpr_(const OrNode* op) final; void VisitExpr_(const CastNode* op) final; void VisitExpr_(const NotNode* op) final; void VisitExpr_(const SelectNode* op) final; void VisitExpr_(const RampNode* op) final; void VisitExpr_(const BroadcastNode* op) final; void VisitExpr_(const IntImmNode* op) final; void VisitExpr_(const FloatImmNode* op) final; void VisitExpr_(const StringImmNode* op) final; // statment void VisitStmt_(const LetStmtNode* op) final; void VisitStmt_(const StoreNode* op) final; void VisitStmt_(const ForNode* op) final; void VisitStmt_(const IfThenElseNode* op) final; void VisitStmt_(const AllocateNode* op) final; void VisitStmt_(const AttrStmtNode* op) final; void VisitStmt_(const AssertStmtNode* op) final; void VisitStmt_(const EvaluateNode* op) final; void VisitStmt_(const SeqStmtNode* op) final; void VisitStmt_(const ProducerConsumerNode* op) final; private: bool debug_{false}; /*! \brief The vm to be generated */ StackVM vm_; /*! \brief id of each variable */ std::unordered_map<const VarNode*, int> var_idmap_; /*! \brief id of each string */ std::unordered_map<std::string, int> str_idmap_; /*! \brief id of each global function */ std::unordered_map<std::string, int> extern_fun_idmap_; }; } // namespace codegen } // namespace tvm #endif // TVM_TARGET_STACKVM_CODEGEN_STACKVM_H_