localindice() [2/2]

Int localindice	(	Int	ig,
		Int	jg,
		Int	templateheight,
		Int	templatewidth,
		MDESC *	a
	)

Definition at line 267 of file pgemraux.c.

{
  Int   vtemp, htemp, vsubtemp, hsubtemp, il, jl;
  assert(ig >= 0 && ig < a->m && jg >= 0 && jg < a->n);
  /* coordinates in global matrix with the tests in intersect, ig MUST BE in
   * [0..m] and jg in [0..n] */
  /* coordinates of the template that "owns" the element */
  vtemp = ig / templateheight;
  htemp = jg / templatewidth;
  /* coordinates of the element in the subblock of the (vtemp, htemp)
   * template */
  vsubtemp = ig % a->nbrow;
  hsubtemp = jg % a->nbcol;
  /* coordinates of the element in the local block of the processor */
  il = a->nbrow * vtemp + vsubtemp;
  jl = a->nbcol * htemp + hsubtemp;
  assert(il < a->lda);
#ifndef NDEBUG
  {
    Int   pr, pc, p, q, lp, lq;
    Cblacs_gridinfo(a->ctxt, &p, &q, &pr, &pc);
    p = templateheight / a->nbrow;
    q = templatewidth / a->nbcol;
    lp = ig % templateheight / a->nbrow;
    lq = jg % templatewidth / a->nbcol;
    assert(lp == SHIFT(pr, a->sprow, p));
    assert(lq == SHIFT(pc, a->spcol, q));
  }
#endif
  return (jl * a->lda + il);
}

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