LAPACK  3.5.0
LAPACK: Linear Algebra PACKage
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lapacke_dgtsvx_work.c File Reference
#include "lapacke_utils.h"
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Functions/Subroutines

lapack_int LAPACKE_dgtsvx_work (int matrix_order, char fact, char trans, lapack_int n, lapack_int nrhs, const double *dl, const double *d, const double *du, double *dlf, double *df, double *duf, double *du2, lapack_int *ipiv, const double *b, lapack_int ldb, double *x, lapack_int ldx, double *rcond, double *ferr, double *berr, double *work, lapack_int *iwork)

Function/Subroutine Documentation

lapack_int LAPACKE_dgtsvx_work ( int  matrix_order,
char  fact,
char  trans,
lapack_int  n,
lapack_int  nrhs,
const double *  dl,
const double *  d,
const double *  du,
double *  dlf,
double *  df,
double *  duf,
double *  du2,
lapack_int ipiv,
const double *  b,
lapack_int  ldb,
double *  x,
lapack_int  ldx,
double *  rcond,
double *  ferr,
double *  berr,
double *  work,
lapack_int iwork 
)

Definition at line 36 of file lapacke_dgtsvx_work.c.

{
lapack_int info = 0;
if( matrix_order == LAPACK_COL_MAJOR ) {
/* Call LAPACK function and adjust info */
LAPACK_dgtsvx( &fact, &trans, &n, &nrhs, dl, d, du, dlf, df, duf, du2,
ipiv, b, &ldb, x, &ldx, rcond, ferr, berr, work, iwork,
&info );
if( info < 0 ) {
info = info - 1;
}
} else if( matrix_order == LAPACK_ROW_MAJOR ) {
lapack_int ldb_t = MAX(1,n);
lapack_int ldx_t = MAX(1,n);
double* b_t = NULL;
double* x_t = NULL;
/* Check leading dimension(s) */
if( ldb < nrhs ) {
info = -15;
LAPACKE_xerbla( "LAPACKE_dgtsvx_work", info );
return info;
}
if( ldx < nrhs ) {
info = -17;
LAPACKE_xerbla( "LAPACKE_dgtsvx_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;
}
x_t = (double*)LAPACKE_malloc( sizeof(double) * ldx_t * MAX(1,nrhs) );
if( x_t == NULL ) {
goto exit_level_1;
}
/* Transpose input matrices */
LAPACKE_dge_trans( matrix_order, n, nrhs, b, ldb, b_t, ldb_t );
/* Call LAPACK function and adjust info */
LAPACK_dgtsvx( &fact, &trans, &n, &nrhs, dl, d, du, dlf, df, duf, du2,
ipiv, b_t, &ldb_t, x_t, &ldx_t, rcond, ferr, berr, work,
iwork, &info );
if( info < 0 ) {
info = info - 1;
}
/* Transpose output matrices */
LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, nrhs, x_t, ldx_t, x, ldx );
/* Release memory and exit */
LAPACKE_free( x_t );
exit_level_1:
LAPACKE_free( b_t );
exit_level_0:
LAPACKE_xerbla( "LAPACKE_dgtsvx_work", info );
}
} else {
info = -1;
LAPACKE_xerbla( "LAPACKE_dgtsvx_work", info );
}
return info;
}

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