text: //------------------------------------------------------------------------------
  // GB_split_bitmap_template: split a bitmap matrix into a bitmap tile
  //------------------------------------------------------------------------------
  
  // SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2021, All Rights Reserved.
  // SPDX-License-Identifier: Apache-2.0
  
  //------------------------------------------------------------------------------
  
  {
  
      //--------------------------------------------------------------------------
      // get C and the tile A
      //--------------------------------------------------------------------------
  
      const GB_CTYPE *restrict Ax = (GB_CTYPE *) A->x ;
      GB_CTYPE *restrict Cx = (GB_CTYPE *) C->x ;
  
      int64_t pC ;
      #pragma omp parallel for num_threads(C_nthreads) schedule(static) \
          reduction(+:cnz)
      for (pC = 0 ; pC < cnzmax ; pC++)
      {
          int64_t i = pC % cvlen ;
          int64_t j = pC / cvlen ;
          int64_t iA = aistart + i ;
          int64_t jA = avstart + j ;
          int64_t pA = iA + jA * avlen ;
          Cb [pC] = Ab [pA] ;
          if (Ab [pA])
          {
              // Cx [pC] = Ax [pA] ;
              GB_COPY (pC, pA) ;
              cnz++ ;
          }
      }
  
      done = true ;
  }
  
  #undef GB_CTYPE
  
  