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/*
* -- SuperLU routine (version 3.0) --
* Univ. of California Berkeley, Xerox Palo Alto Research Center,
* and Lawrence Berkeley National Lab.
* October 15, 2003
*
*/
/*
Copyright (c) 1994 by Xerox Corporation. All rights reserved.
THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY
EXPRESSED OR IMPLIED. ANY USE IS AT YOUR OWN RISK.
Permission is hereby granted to use or copy this program for any
purpose, provided the above notices are retained on all copies.
Permission to modify the code and to distribute modified code is
granted, provided the above notices are retained, and a notice that
the code was modified is included with the above copyright notice.
*/
#include "csp_defs.h"
/*
* Performs numeric block updates within the relaxed snode.
*/
int
csnode_bmod (
const int jcol, /* in */
const int jsupno, /* in */
const int fsupc, /* in */
complex *dense, /* in */
complex *tempv, /* working array */
GlobalLU_t *Glu, /* modified */
SuperLUStat_t *stat /* output */
)
{
#ifdef USE_VENDOR_BLAS
#ifdef _CRAY
_fcd ftcs1 = _cptofcd("L", strlen("L")),
ftcs2 = _cptofcd("N", strlen("N")),
ftcs3 = _cptofcd("U", strlen("U"));
#endif
int incx = 1, incy = 1;
complex alpha = {-1.0, 0.0}, beta = {1.0, 0.0};
#endif
complex comp_zero = {0.0, 0.0};
int luptr, nsupc, nsupr, nrow;
int isub, irow, i, iptr;
register int ufirst, nextlu;
int *lsub, *xlsub;
complex *lusup;
int *xlusup;
flops_t *ops = stat->ops;
lsub = Glu->lsub;
xlsub = Glu->xlsub;
lusup = Glu->lusup;
xlusup = Glu->xlusup;
nextlu = xlusup[jcol];
/*
* Process the supernodal portion of L\U[*,j]
*/
for (isub = xlsub[fsupc]; isub < xlsub[fsupc+1]; isub++) {
irow = lsub[isub];
lusup[nextlu] = dense[irow];
dense[irow] = comp_zero;
++nextlu;
}
xlusup[jcol + 1] = nextlu; /* Initialize xlusup for next column */
if ( fsupc < jcol ) {
luptr = xlusup[fsupc];
nsupr = xlsub[fsupc+1] - xlsub[fsupc];
nsupc = jcol - fsupc; /* Excluding jcol */
ufirst = xlusup[jcol]; /* Points to the beginning of column
jcol in supernode L\U(jsupno). */
nrow = nsupr - nsupc;
ops[TRSV] += 4 * nsupc * (nsupc - 1);
ops[GEMV] += 8 * nrow * nsupc;
#ifdef USE_VENDOR_BLAS
#ifdef _CRAY
CTRSV( ftcs1, ftcs2, ftcs3, &nsupc, &lusup[luptr], &nsupr,
&lusup[ufirst], &incx );
CGEMV( ftcs2, &nrow, &nsupc, &alpha, &lusup[luptr+nsupc], &nsupr,
&lusup[ufirst], &incx, &beta, &lusup[ufirst+nsupc], &incy );
#else
ctrsv_( "L", "N", "U", &nsupc, &lusup[luptr], &nsupr,
&lusup[ufirst], &incx );
cgemv_( "N", &nrow, &nsupc, &alpha, &lusup[luptr+nsupc], &nsupr,
&lusup[ufirst], &incx, &beta, &lusup[ufirst+nsupc], &incy );
#endif
#else
clsolve ( nsupr, nsupc, &lusup[luptr], &lusup[ufirst] );
cmatvec ( nsupr, nrow, nsupc, &lusup[luptr+nsupc],
&lusup[ufirst], &tempv[0] );
/* Scatter tempv[*] into lusup[*] */
iptr = ufirst + nsupc;
for (i = 0; i < nrow; i++) {
c_sub(&lusup[iptr], &lusup[iptr], &tempv[i]);
++iptr;
tempv[i] = comp_zero;
}
#endif
}
return 0;
}
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