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#include "tools.h"
void CpdasymvU(N, alpha, A, IA, JA, descA, X0, IX0, JX0, descX0, incX0, beta,
Y0, IY0, JY0, descY0, incY0)
int N;
double alpha;
double *A;
int IA;
int JA;
int *descA;
double *X0;
int IX0;
int JX0;
int *descX0;
int incX0;
double beta;
double *Y0;
int IY0;
int JY0;
int *descY0;
int incY0;
/*
*
* ======(Yr)======
* ======(Xr)======
* N
* ---------------
* | | |\_ | A - N x N
* | | | \_ | Y - N x 1
* | | | \_ (A) | X - 1 x N
* (Yc) (Xr) N | \_ |
* | | | \_ | X will be replicated on every
* | | | \_ | process row and column
* | | | \ | Y will have space on every
* | | | \_| process row and column
* ---------------
*/
{
/*
* .. External routines ..
*/
char *ptop();
void pchkmat();
void pchkvec();
void pberror_();
void Cinfog2l();
int Cnumroc2();
void Cblacs_gridinfo();
void Cdgebs2d();
void Cdgebr2d();
void Cdgsum2d();
F_INTG_FCT dgemv_();
void Cpdscal1();
void Cpdcopy1();
void Cpdaxpy1();
F_CHAR trans;
char *top;
int ctxt, nprow, npcol, myrow, mycol;
int Ir, Ic, Jr, Jc, inc;
int descXr[DLEN_], descXc[DLEN_], descYr[DLEN_], descYc[DLEN_];
int i, j, k, kb, nb, lld, LOCp, LOCq, LOCp2, LOCq2, info=0, one=1, I=0;
int arow, acol, currow, curcol;
double *Xr, *Xc, *Yr, *Yc, *xr, *xc, *yr, *yc, *yr2, *yc2;
double *absA, *a, *ar, *ac, *aa;
double zero=0;
ctxt = descA[CTXT_];
Cblacs_gridinfo(descA[CTXT_], &nprow, &npcol, &myrow, &mycol);
/*
* Scale Y0 by beta: Y0 = beta * Y0; this allows us to later add in
* alpha*A*x to get Y0 = alpha*A*x + Y0*beta
*/
Cpdscal1(N, beta, Y0, IY0, JY0, descY0, incY0);
/*
* Get local information about our matrix
*/
Cinfog2l(IA, JA, descA, nprow, npcol, myrow, mycol, &i, &j, &arow, &acol);
a = &A[ i+j*descA[LLD_] ];
nb = descA[NB_];
lld = descA[LLD_];
LOCp2 = LOCp = Cnumroc2(N, IA, nb, myrow, descA[RSRC_], nprow);
LOCq2 = LOCq = Cnumroc2(N, JA, nb, mycol, descA[CSRC_], npcol);
/*
* Set up Xr and Xc, and copy abs( X ) to one row/col.
*/
inc = 1;
Ir = Jc = 0;
Jr = JA % nb;
Ic = IA % nb;
i = Jr + LOCq;
j = Ic + LOCp;
Mmalloc(Xr, double, i+j, info, ctxt);
Xc = &Xr[i];
Mdescset(descXr, 1, N + Jr, nb, nb,
MCindxg2p(IX0, descX0[MB_], descX0[RSRC_], nprow), acol, ctxt, 1);
Mdescset(descXc, N + Ic, 1, nb, nb, arow,
MCindxg2p(JX0, descX0[NB_], descX0[CSRC_], npcol), ctxt, MAX(j,1));
Cpdcopy1(N, X0, IX0, JX0, descX0, incX0, Xr, Ir, Jr, descXr, inc);
Cpdcopy1(N, X0, IX0, JX0, descX0, incX0, Xc, Ic, Jc, descXc, inc);
/*
* Set up Yr and Yc
*/
Mmalloc(Yr, double, i+j, info, ctxt);
Yc = &Yr[i];
Mdescset(descYc, N + Ic, 1, nb, nb, arow,
MCindxg2p(JY0, descY0[NB_], descY0[CSRC_], npcol), ctxt, MAX(j,1));
Mdescset(descYr, 1, N + Jr, nb, nb,
MCindxg2p(IY0, descY0[MB_], descY0[RSRC_], nprow), acol, ctxt, 1);
/*
* Get memory for absA
*/
Mmalloc(absA, double, nb*MAX(LOCp, LOCq), info, ctxt);
/*
* Set local pointers
*/
if (myrow == arow)
{
xc = &Xc[Ic];
yc2 = yc = &Yc[Ic];
}
else
{
xc = Xc;
yc2 = yc = Yc;
}
if (mycol == acol)
{
xr = &Xr[Jr];
yr2 = yr = &Yr[Jr];
}
else
{
xr = Xr;
yr2 = yr = Yr;
}
ac = ar = a;
/*
* Broadcast X so all rows and columns have a copy
*/
top = ptop("B", "C", "!");
if (myrow == descXr[RSRC_])
{
for (i=0; i < LOCq; i++) xr[i] = ABS( xr[i] );
Cdgebs2d(ctxt, "c", top, LOCq, 1, xr, LOCq);
}
else Cdgebr2d(ctxt, "c", top, LOCq, 1, xr, LOCq, descXr[RSRC_], mycol);
top = ptop("B", "R", "!");
if (mycol == descXc[CSRC_])
{
for (i=0; i < LOCp; i++) xc[i] = ABS( xc[i] );
Cdgebs2d(ctxt, "r", top, LOCp, 1, xc, LOCp);
}
else Cdgebr2d(ctxt, "r", top, LOCp, 1, xc, LOCp, myrow, descXc[CSRC_]);
/*
* Loop over global matrix
*/
kb = nb - Ic;
kb = MIN(kb, N);
currow = arow;
curcol = acol;
LOCp = 0;
do
{
if (mycol == curcol)
{
trans = C2F_CHAR("T");
aa = absA;
a = ac;
if (myrow == currow) /* I have diagonal blocks */
{
/*
* Do block along column
*/
for (j=0; j != kb; j++)
{
k = LOCp + j;
for (i=0; i != k; i++) aa[i] = ABS( a[i] );
for (k=LOCp+kb; i != k; i++) aa[i] = 0.0;
aa += k;
a += lld;
}
LOCp += kb;
dgemv_(trans, &LOCp, &kb, &alpha, absA, &LOCp, xc, &one, &zero,
yr, &one);
/*
* Do block along row
*/
trans = C2F_CHAR("N");
aa = absA;
a = ar;
for (j=0; j != kb; j++) /* copy diagonal block */
{
for (i=0; i <= j; i++) aa[i] = ABS( a[i] );
for (; i != kb; i++) aa[i] = 0.0;
aa += kb;
a += lld;
}
for (j=LOCq-kb; j; j--)
{
for (i=0; i != kb; i++) aa[i] = ABS( a[i] );
aa += kb;
a += lld;
}
dgemv_(trans, &kb, &LOCq, &alpha, absA, &kb, xr, &one, &zero,
yc, &one);
ar += kb*(lld + 1);
yc += kb;
}
else
{
ar += kb*lld;
if (LOCp)
{
for (j=kb; j; j--)
{
for (i=0; i != LOCp; i++) aa[i] = ABS( a[i] );
aa += LOCp;
a += lld;
}
dgemv_(trans, &LOCp, &kb, &alpha, absA, &LOCp, xc, &one, &zero,
yr, &one);
}
else for (i=0; i != kb; i++) yr[i] = 0.0;
}
LOCq -= kb;
xr += kb;
yr += kb;
ac += kb*lld;
}
else if (myrow == currow)
{
LOCp += kb;
if (LOCq)
{
trans = C2F_CHAR("N");
a = ar;
aa = absA;
for (j=LOCq; j; j--)
{
for (i=0; i != kb; i++) aa[i] = ABS( a[i] );
aa += kb;
a += lld;
}
dgemv_(trans, &kb, &LOCq, &alpha, absA, &kb, xr, &one, &zero,
yc, &one);
}
else for (i=0; i != kb; i++) yc[i] = 0.0;
ar += kb;
yc += kb;
}
I += kb;
kb = MIN(nb, N-I);
if (++currow == nprow) currow=0;
if (++curcol == npcol) curcol=0;
}
while (I != N);
free(Xr);
free(absA);
/*
* Collect distributed Yr and Yc
*/
if (LOCq2 != 0)
{
top = ptop("C", "C", "!");
Cdgsum2d(ctxt, "col", top, LOCq2, 1, yr2, LOCq2, descYr[RSRC_], mycol);
}
if (LOCp2 != 0)
{
top = ptop("C", "R", "!");
Cdgsum2d(ctxt, "row", top, LOCp2, 1, yc2, LOCp2, myrow, descYr[CSRC_]);
}
/*
* Set y = yc + yr
*/
if (incY0 == descY0[M_])
{
Cpdaxpy1(N, 1.0, Yc, Ic, Jc, descYc, inc, Yr, Ir, Jr, descYr, inc);
Cpdaxpy1(N, 1.0, Yr, Ir, Jr, descYr, inc, Y0, IY0, JY0, descY0, incY0);
}
else
{
Cpdaxpy1(N, 1.0, Yr, Ir, Jr, descYr, inc, Yc, Ic, Jc, descYc, inc);
Cpdaxpy1(N, 1.0, Yc, Ic, Jc, descYc, inc, Y0, IY0, JY0, descY0, incY0);
}
free(Yr);
}
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