/*! * Copyright (c) 2017 by Contributors * \file codegen_stack_vm.h * \brief Codegen into Simple Stack VM. */ #ifndef TVM_CODEGEN_STACK_VM_CODEGEN_STACK_VM_H_ #define TVM_CODEGEN_STACK_VM_CODEGEN_STACK_VM_H_ #include <tvm/ir.h> #include <tvm/ir_functor_ext.h> #include <tvm/lowered_func.h> #include <tvm/codegen.h> #include <string> #include <vector> #include <unordered_map> #include "./stack_vm.h" namespace tvm { namespace codegen { using namespace ir; /*! * \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 Expr&)>, 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 Expr& 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 Variable* v); /*! * \brief Get a variable name. * \param v The variable. * \return the heap index of the var. */ int GetVarID(const Variable* v) const; // Push binary operator void PushBinary(StackVM::OpCode op_int64, const Expr& a, const Expr& b); // push cast; void PushCast(Type dst, Type src); // overloadable functions // expression void VisitExpr_(const Variable* op) final; void VisitExpr_(const Load* op) final; void VisitExpr_(const Let* op) final; void VisitExpr_(const Call* op) final; void VisitExpr_(const Add* op) final; void VisitExpr_(const Sub* op) final; void VisitExpr_(const Mul* op) final; void VisitExpr_(const Div* op) final; void VisitExpr_(const Mod* op) final; void VisitExpr_(const Min* op) final; void VisitExpr_(const Max* op) final; void VisitExpr_(const EQ* op) final; void VisitExpr_(const NE* op) final; void VisitExpr_(const LT* op) final; void VisitExpr_(const LE* op) final; void VisitExpr_(const GT* op) final; void VisitExpr_(const GE* op) final; void VisitExpr_(const And* op) final; void VisitExpr_(const Or* op) final; void VisitExpr_(const Cast* op) final; void VisitExpr_(const Not* op) final; void VisitExpr_(const Select* op) final; void VisitExpr_(const Ramp* op) final; void VisitExpr_(const Broadcast* op) final; void VisitExpr_(const IntImm* op) final; void VisitExpr_(const UIntImm* op) final; void VisitExpr_(const FloatImm* op) final; void VisitExpr_(const StringImm* op) final; // statment void VisitStmt_(const LetStmt* op) final; void VisitStmt_(const Store* op) final; void VisitStmt_(const For* op) final; void VisitStmt_(const IfThenElse* op) final; void VisitStmt_(const Allocate* op) final; void VisitStmt_(const AttrStmt* op) final; void VisitStmt_(const AssertStmt* op) final; void VisitStmt_(const Evaluate* op) final; void VisitStmt_(const Block* op) final; void VisitStmt_(const ProducerConsumer* op) final; private: bool debug_{false}; /*! \brief The vm to be generated */ StackVM vm_; /*! \brief id of each variable */ std::unordered_map<const Variable*, 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_CODEGEN_STACK_VM_CODEGEN_STACK_VM_H_