expression.hxx

// dawn/include/dawn/prog/expression.hxx
//
// SPDX-License-Identifier: Apache-2.0
//
 
#pragma once
 
#include <cstdint>
#include <inttypes.h>
#include <vector>
 
#include "dawn/io/sdata.hxx"
#include "dawn/porting/config.hxx"
#include "dawn/prog/common.hxx"
 
namespace dawn
{
class CIOCommon;
class io_ddata_t;
 
class CProgExpression : public CProgCommon
{
public:
  enum
  {
    PROG_EXPRESSION_CFG_FIRST = 0,
    PROG_EXPRESSION_CFG_IOBIND = 1,
    PROG_EXPRESSION_CFG_OP = 2,
    PROG_EXPRESSION_CFG_LAST = 31
  };
 
  enum
  {
    OP_SHIFT_LEFT = 0,
    OP_SHIFT_RIGHT = 1,
    OP_CONST_LEFT_SHIFT = 2,
    OP_ADD = 3,
    OP_SUB = 4,
  };
 
  explicit CProgExpression(CDescObject &desc);
  ~CProgExpression() override;
 
  int configure() override;
  int init() override;
  int deinit() override;
  int doStart() override;
  int doStop() override;
  bool hasThread() const override;
 
#ifdef CONFIG_DAWN_OBJECT_HAS_NAME
  const char *getClassNameStr() const override
  {
    return "expression";
  }
#endif
 
  constexpr static SObjectId::ObjectId objectId(uint16_t inst)
  {
    return SObjectId::objectId(
      SObjectId::OBJTYPE_PROG, CProgCommon::PROG_CLASS_EXPRESSION, SObjectId::DTYPE_ANY, 0, inst);
  }
 
  constexpr static SObjectCfg::ObjectCfgId cfgId(bool rw, uint8_t size, uint8_t id)
  {
    return SObjectCfg::objectCfg(SObjectId::OBJTYPE_PROG,
                                 CProgCommon::PROG_CLASS_EXPRESSION,
                                 SObjectId::DTYPE_ANY,
                                 rw,
                                 size,
                                 id);
  }
 
  constexpr static SObjectCfg::ObjectCfgId cfgIdIOBind(uint16_t size = 2)
  {
    return CProgExpression::cfgId(false, size, PROG_EXPRESSION_CFG_IOBIND);
  }
 
  constexpr static SObjectCfg::ObjectCfgId cfgIdOp(uint16_t size = 2)
  {
    return CProgExpression::cfgId(false, 2, PROG_EXPRESSION_CFG_OP);
  }
 
private:
  struct SExpressionBind
  {
    CProgExpression *owner;
    SObjectId::ObjectId sourceId;
    SObjectId::ObjectId outputId;
    CIOCommon *source;
    CIOCommon *output;
    io_sdata_t<uint32_t, 1, 1> sourceData;
    io_sdata_t<uint32_t, 1, 1> outputData;
  };
 
  std::vector<SExpressionBind *> binds; 
  uint32_t opType;                      
  uint32_t constant;                    
  bool active;                          
  bool registered;                      
 
  static int ioNotifierCb(void *priv, io_ddata_t *data);
 
  int configureDesc(const CDescObject &desc);
  int allocBind(SObjectId::ObjectId sourceId, SObjectId::ObjectId outputId);
  bool compute(uint32_t input, uint32_t &result, const char *phase);
  void refresh(SExpressionBind *bind, io_ddata_t *data, const char *phase);
};
} // Namespace dawn