text: // Copyright(c) 2017-2018, Intel Corporation
  //
  // Redistribution  and  use  in source  and  binary  forms,  with  or  without
  // modification, are permitted provided that the following conditions are met:
  //
  // * Redistributions of  source code  must retain the  above copyright notice,
  //   this list of conditions and the following disclaimer.
  // * Redistributions in binary form must reproduce the above copyright notice,
  //   this list of conditions and the following disclaimer in the documentation
  //   and/or other materials provided with the distribution.
  // * Neither the name  of Intel Corporation  nor the names of its contributors
  //   may be used to  endorse or promote  products derived  from this  software
  //   without specific prior written permission.
  //
  // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  // AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,  BUT NOT LIMITED TO,  THE
  // IMPLIED WARRANTIES OF  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  // ARE DISCLAIMED.  IN NO EVENT  SHALL THE COPYRIGHT OWNER  OR CONTRIBUTORS BE
  // LIABLE  FOR  ANY  DIRECT,  INDIRECT,  INCIDENTAL,  SPECIAL,  EXEMPLARY,  OR
  // CONSEQUENTIAL  DAMAGES  (INCLUDING,  BUT  NOT LIMITED  TO,  PROCUREMENT  OF
  // SUBSTITUTE GOODS OR SERVICES;  LOSS OF USE,  DATA, OR PROFITS;  OR BUSINESS
  // INTERRUPTION)  HOWEVER CAUSED  AND ON ANY THEORY  OF LIABILITY,  WHETHER IN
  // CONTRACT,  STRICT LIABILITY,  OR TORT  (INCLUDING NEGLIGENCE  OR OTHERWISE)
  // ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,  EVEN IF ADVISED OF THE
  // POSSIBILITY OF SUCH DAMAGE.
  
  #pragma once
  #include <cstdint>
  
  template<typename T = uint32_t>
  class csr_t
  {
  public:
      csr_t()
          : value_(0){}
  
      csr_t(T value)
          : value_(value){}
  
      template<typename U>
      csr_t & operator=(U t)
      {
          value_ = static_cast<T>(t);
          return *this;
      }
  
      template<typename U>
      uint32_t operator|(U t)
      {
          return value_ | static_cast<T>(t);
      }
  
      template<typename U>
      csr_t & operator|=(U t)
      {
          value_ |= static_cast<T>(t);
          return *this;
      }
  
      template<typename U>
      uint32_t operator&(U t)
      {
          return value_ & static_cast<T>(t);
      }
  
      template<typename U>
      csr_t & operator&=(U t)
      {
          value_ &= static_cast<T>(t);
          return *this;
      }
  
      T value()
      {
          return value_;
      }
  
  private:
      T value_;
  };
  