xmp_index.c File Reference

#include "xmp_internal.h"

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Functions
void	_XMP_L2G (int local_idx, long long int *global_idx, _XMP_template_t *template, int template_index)
void	_XMP_G2L (long long int global_idx, int *local_idx, _XMP_template_t *template, int template_index)

Function Documentation

_XMP_G2L()

void _XMP_G2L	(	long long int	global_idx,
		int *	local_idx,
		_XMP_template_t *	template,
		int	template_index
	)

{
  _XMP_template_chunk_t *chunk = &(template->chunk[template_index]);
  _XMP_nodes_info_t *n_info = chunk->onto_nodes_info;
  long long base = template->info[template_index].ser_lower;
 
  // NOTE: local_idx is 0-origin.
 
  switch(chunk->dist_manner){
  case _XMP_N_DIST_DUPLICATION:
    //*local_idx = global_idx - base;
    *local_idx = global_idx;
    break;
  case _XMP_N_DIST_BLOCK:
    *local_idx = (global_idx - base) - n_info->rank * chunk->par_chunk_width;
    break;
  case _XMP_N_DIST_CYCLIC:
    *local_idx = (global_idx - base) / n_info->size;
    break;
  case _XMP_N_DIST_BLOCK_CYCLIC:
    {
      int off = global_idx - base;
      int w = chunk->par_width;
      *local_idx = (off / (n_info->size*w)) * w + off%w;
    }
    break;
  case _XMP_N_DIST_GBLOCK:
    *local_idx = global_idx - chunk->mapping_array[n_info->rank];
    break;
  default:
    _XMP_fatal("_XMP_: unknown chunk dist_manner");
  }
}

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_XMP_L2G()

void _XMP_L2G	(	int	local_idx,
		long long int *	global_idx,
		_XMP_template_t *	template,
		int	template_index
	)

{
  if(! template->is_owner){
    return;
  }
 
  _XMP_template_chunk_t *chunk = &(template->chunk[template_index]);
  _XMP_nodes_info_t *n_info = chunk->onto_nodes_info;
  long long base = template->info[template_index].ser_lower;
 
  switch(chunk->dist_manner){
  case _XMP_N_DIST_DUPLICATION:
    //*global_idx = base + local_idx ;
    *global_idx = local_idx ;
    break;
  case _XMP_N_DIST_BLOCK:
    *global_idx = base + n_info->rank * chunk->par_chunk_width + local_idx;
    //xmpf_dbg_printf("%d -> %d, base = %d, rank = %d, chunk = %d\n", local_idx, *global_idx, base, n_info->rank, chunk->par_chunk_width);
    break;
  case _XMP_N_DIST_CYCLIC:
    *global_idx = base + n_info->rank + n_info->size * local_idx;
    break;
  case _XMP_N_DIST_BLOCK_CYCLIC:
    {
      int w = chunk->par_width;
      *global_idx = base + n_info->rank * w
                  + (local_idx/w) * w * n_info->size + local_idx%w;
    }
    break;
  case _XMP_N_DIST_GBLOCK:
    *global_idx = local_idx + chunk->mapping_array[n_info->rank];
    break;
  default:
    _XMP_fatal("_XMP_: unknown chunk dist_manner");
  }
}

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