ysyx-workbench/npc/include/vpi_wrapper.hpp

#ifndef _NPC_VPI_WRAPPER_H_
#define _NPC_VPI_WRAPPER_H_
#include <components.hpp>
#include <spdlog/logger.h>
#include <spdlog/sinks/stdout_color_sinks.h>
#include <spdlog/spdlog.h>
#include <vpi_user.h>

template <typename T, std::size_t nr>
class _RegistersVPI : public _RegistersBase<T, nr> {
  std::array<vpiHandle, nr> reg_handles;
  vpiHandle pc_handle;

  T vpi_get(vpiHandle vh) const {
    s_vpi_value v;
    v.format = vpiIntVal;
    vpi_get_value(vh, &v);
    return v.value.integer;
  }
  T fetch_pc(void) const { return vpi_get(pc_handle); }
  T fetch_reg(std::size_t id) const { return vpi_get(reg_handles[id]); }

public:
  _RegistersVPI<T, nr>(const std::string regs_prefix,
                       const std::string pcname) {
    init_handlers(regs_prefix, pcname);
  }

private:
  static vpiHandle get_handle(const std::string name) {
    vpiHandle hdl = vpi_handle_by_name((PLI_BYTE8 *)name.c_str(), nullptr);
    if (hdl == nullptr) {
      SPDLOG_ERROR("VPI Handle {} not found", name);
      exit(EXIT_FAILURE);
    } else {
      SPDLOG_INFO("Found VPI handle {} at {}", name, (void *)hdl);
    }
    return hdl;
  }

  void init_handlers(const std::string regs_prefix, const std::string pcname) {
    pc_handle = get_handle(pcname);
    for (int i = 0; i < nr; i++) {
      std::string regname = regs_prefix + std::to_string(i);
      reg_handles[i] = get_handle(regname);
    }
  }
};

#endif