LAPACK  3.5.0
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lapacke_dgtsv_work.c File Reference
#include "lapacke_utils.h"
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Functions/Subroutines

lapack_int LAPACKE_dgtsv_work (int matrix_order, lapack_int n, lapack_int nrhs, double *dl, double *d, double *du, double *b, lapack_int ldb)

Function/Subroutine Documentation

lapack_int LAPACKE_dgtsv_work ( int  matrix_order,
lapack_int  n,
lapack_int  nrhs,
double *  dl,
double *  d,
double *  du,
double *  b,
lapack_int  ldb 
)

Definition at line 36 of file lapacke_dgtsv_work.c.

{
lapack_int info = 0;
if( matrix_order == LAPACK_COL_MAJOR ) {
/* Call LAPACK function and adjust info */
LAPACK_dgtsv( &n, &nrhs, dl, d, du, b, &ldb, &info );
if( info < 0 ) {
info = info - 1;
}
} else if( matrix_order == LAPACK_ROW_MAJOR ) {
lapack_int ldb_t = MAX(1,n);
double* b_t = NULL;
/* Check leading dimension(s) */
if( ldb < nrhs ) {
info = -8;
LAPACKE_xerbla( "LAPACKE_dgtsv_work", info );
return info;
}
/* Allocate memory for temporary array(s) */
b_t = (double*)LAPACKE_malloc( sizeof(double) * ldb_t * MAX(1,nrhs) );
if( b_t == NULL ) {
goto exit_level_0;
}
/* Transpose input matrices */
LAPACKE_dge_trans( matrix_order, n, nrhs, b, ldb, b_t, ldb_t );
/* Call LAPACK function and adjust info */
LAPACK_dgtsv( &n, &nrhs, dl, d, du, b_t, &ldb_t, &info );
if( info < 0 ) {
info = info - 1;
}
/* Transpose output matrices */
LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, nrhs, b_t, ldb_t, b, ldb );
/* Release memory and exit */
LAPACKE_free( b_t );
exit_level_0:
LAPACKE_xerbla( "LAPACKE_dgtsv_work", info );
}
} else {
info = -1;
LAPACKE_xerbla( "LAPACKE_dgtsv_work", info );
}
return info;
}

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