lapacke_cgelss.c

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* Contents: Native high-level C interface to LAPACK function cgelss
* Author: Intel Corporation
*****************************************************************************/

#include"lapacke_utils.h"

lapack_intLAPACKE_cgelss( intmatrix_layout, lapack_intm, lapack_intn,
lapack_intnrhs, lapack_complex_float*a,
lapack_intlda, lapack_complex_float*b,
lapack_intldb, float*s, floatrcond,
lapack_int*rank )
{
lapack_intinfo=0;
lapack_intlwork=-1;
float*rwork=NULL;
lapack_complex_float*work=NULL;
lapack_complex_floatwork_query;
if( matrix_layout!=LAPACK_COL_MAJOR&&matrix_layout!=LAPACK_ROW_MAJOR ) {
LAPACKE_xerbla( "LAPACKE_cgelss", -1 );
return-1;
 }
#ifndefLAPACK_DISABLE_NAN_CHECK
if( LAPACKE_get_nancheck() ) {
/* Optionally check input matrices for NaNs */
if( LAPACKE_cge_nancheck( matrix_layout, m, n, a, lda ) ) {
return-5;
 }
if( LAPACKE_cge_nancheck( matrix_layout, MAX(m,n), nrhs, b, ldb ) ) {
return-7;
 }
if( LAPACKE_s_nancheck( 1, &rcond, 1 ) ) {
return-10;
 }
 }
#endif
/* Allocate memory for working array(s) */
rwork= (float*)LAPACKE_malloc( sizeof(float) *MAX(1,5*MIN(m,n)) );
if( rwork==NULL ) {
info=LAPACK_WORK_MEMORY_ERROR;
 goto exit_level_0;
 }
/* Query optimal working array(s) size */
info=LAPACKE_cgelss_work( matrix_layout, m, n, nrhs, a, lda, b, ldb, s,
rcond, rank, &work_query, lwork, rwork );
if( info!=0 ) {
 goto exit_level_1;
 }
lwork=LAPACK_C2INT( work_query );
/* Allocate memory for work arrays */
work= (lapack_complex_float*)
LAPACKE_malloc( sizeof(lapack_complex_float) *lwork );
if( work==NULL ) {
info=LAPACK_WORK_MEMORY_ERROR;
 goto exit_level_1;
 }
/* Call middle-level interface */
info=LAPACKE_cgelss_work( matrix_layout, m, n, nrhs, a, lda, b, ldb, s,
rcond, rank, work, lwork, rwork );
/* Release memory and exit */
LAPACKE_free( work );
exit_level_1:
LAPACKE_free( rwork );
exit_level_0:
if( info==LAPACK_WORK_MEMORY_ERROR ) {
LAPACKE_xerbla( "LAPACKE_cgelss", info );
 }
returninfo;
}