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#include <stdlib.h>
#include <stdio.h>
#ifndef Int
#define Int int
#endif
Int SL_Cgridreshape(Int ctxt, Int pstart, Int row_major_in, Int row_major_out, Int P, Int Q)
{
Int Cblacs_pnum();
Int nctxt, P0, Q0, Np, i, *g;
Cblacs_gridinfo(ctxt, &P0, &Q0, &i, &Np);
Np = P * Q;
if (Np+pstart > P0*Q0)
{
fprintf(stderr, "Illegal reshape command in %s\n",__FILE__);
Cblacs_abort(ctxt, -22);
}
g = (Int *) malloc(Np * sizeof(Int));
if (!g)
{
fprintf(stderr, "Cannot allocate memory in %s\n",__FILE__);
Cblacs_abort(ctxt, -23);
}
if (row_major_in) /* Read in in row-major order */
{
if (row_major_out)
for (i=0; i != Np; i++)
g[(i%Q)*P+i/Q] = Cblacs_pnum(ctxt, (pstart+i)/Q0, (pstart+i)%Q0);
else
for (i=0; i != Np; i++)
g[i] = Cblacs_pnum(ctxt, (pstart+i)/Q0, (pstart+i)%Q0);
}
else /* read in in column-major order */
{
if (row_major_out)
for (i=0; i != Np; i++)
g[(i%Q)*P+i/Q] = Cblacs_pnum(ctxt, (pstart+i)%P0, (pstart+i)/P0);
else
for (i=0; i != Np; i++)
g[i] = Cblacs_pnum(ctxt, (pstart+i)%P0, (pstart+i)/P0);
}
Cblacs_get(ctxt, 10, &nctxt);
Cblacs_gridmap(&nctxt, g, P, P, Q);
free(g);
return(nctxt);
}
Int sl_gridreshape_(Int *ctxt, Int *pstart, Int *row_major_in, Int *row_major_out, Int *P, Int *Q)
{
return( SL_Cgridreshape(*ctxt, *pstart, *row_major_in, *row_major_out,
*P, *Q) );
}
Int SL_GRIDRESHAPE(Int *ctxt, Int *pstart, Int *row_major_in, Int *row_major_out, Int *P, Int *Q)
{
return( SL_Cgridreshape(*ctxt, *pstart, *row_major_in, *row_major_out,
*P, *Q) );
}
Int sl_gridreshape__(Int *ctxt, Int *pstart, Int *row_major_in, Int *row_major_out, Int *P, Int *Q)
{
return( SL_Cgridreshape(*ctxt, *pstart, *row_major_in, *row_major_out,
*P, *Q) );
}
Int sl_gridreshape(Int *ctxt, Int *pstart, Int *row_major_in, Int *row_major_out, Int *P, Int *Q)
{
return( SL_Cgridreshape(*ctxt, *pstart, *row_major_in, *row_major_out,
*P, *Q) );
}
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