operate.c

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/*
 Copyright (C) 2006 X. Andrade
 
 This program is free software; you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation; either version 2, or (at your option)
 any later version.
 
 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.
 
 You should have received a copy of the GNU General Public License
 along with this program; if not, write to the Free Software
 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 02110-1301, USA.
 
*/
 
#include <config.h>
 
#include <stddef.h>
 
#include <assert.h>
#include <vectors.h>
 
void FC_FUNC_(doperate_ri_vec,
              DOPERATE_RI_VEC)(const int *opn, const double *restrict w,
                               const int *opnri, const int *opri,
                               const int *rimap_inv, const int *rimap_inv_max,
                               const double *restrict fi, const int *ldfp,
                               double *restrict fo) {
  const size_t ldf = ldfp[0];
 
  /* check whether we got aligned vectors or not */
  int aligned = 1;
  aligned = aligned && (((long long)fi) % (8 * VEC_SIZE) == 0);
  aligned = aligned && (((long long)fo) % (8 * VEC_SIZE) == 0);
  aligned = aligned && ((1 << ldf) % VEC_SIZE == 0);
 
  if (aligned) {
#define ALIGNED
#include "operate_inc.c"
#undef ALIGNED
 
  } else {
    /* not aligned */
#include "operate_inc.c"
  }
}
 
/* the same as doperate_ri_vec, but allows giving each an appropriate Fortan
   interface in which fi and fo are actually complex in Fortran Could be inline,
   but in that case pgcc will not put it in the symbol table. */
void FC_FUNC_(zoperate_ri_vec,
              ZOPERATE_RI_VEC)(const int *opn, const double *restrict w,
                               const int *opnri, const int *opri,
                               const int *rimap_inv, const int *rimap_inv_max,
                               const double *restrict fi, const int *ldfp,
                               double *restrict fo) {
  FC_FUNC_(doperate_ri_vec, DOPERATE_RI_VEC)
  (opn, w, opnri, opri, rimap_inv, rimap_inv_max, fi, ldfp, fo);
}
 
void FC_FUNC_(dgauss_seidel,
              DGAUSS_SEIDEL)(const int *opn, const double *restrict w,
                             const int *opnri, const int *opri,
                             const int *rimap_inv, const int *rimap_inv_max,
                             const double *restrict factor, double *pot,
                             const double *restrict rho) {
 
  const int n = opn[0];
  const int nri = opnri[0];
 
  int l, i, j;
  const int *index;
  register double a0;
  register const double fac = *factor;
 
  for (l = 0; l < nri; l++) {
    index = opri + n * l;
    i = rimap_inv[l];
 
    for (; i < rimap_inv_max[l]; i++) {
      a0 = w[0] * pot[i + index[0]];
      for (j = 1; j < n; j++)
        a0 += w[j] * pot[i + index[j]];
      pot[i] += fac * (a0 - rho[i]);
    }
  }
}