lapacke_cgelsd_work.c

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* Contents: Native middle-level C interface to LAPACK function cgelsd
* Author: Intel Corporation
*****************************************************************************/

#include"lapacke_utils.h"

lapack_intLAPACKE_cgelsd_work( 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_complex_float*work,
lapack_intlwork, float*rwork,
lapack_int*iwork )
{
lapack_intinfo=0;
if( matrix_layout==LAPACK_COL_MAJOR ) {
/* Call LAPACK function and adjust info */
LAPACK_cgelsd( &m, &n, &nrhs, a, &lda, b, &ldb, s, &rcond, rank, work,
&lwork, rwork, iwork, &info );
if( info<0 ) {
info=info-1;
 }
 } elseif( matrix_layout==LAPACK_ROW_MAJOR ) {
lapack_intlda_t=MAX(1,m);
lapack_intldb_t=MAX(1,MAX(m,n));
lapack_complex_float*a_t=NULL;
lapack_complex_float*b_t=NULL;
/* Check leading dimension(s) */
if( lda<n ) {
info=-6;
LAPACKE_xerbla( "LAPACKE_cgelsd_work", info );
returninfo;
 }
if( ldb<nrhs ) {
info=-8;
LAPACKE_xerbla( "LAPACKE_cgelsd_work", info );
returninfo;
 }
/* Query optimal working array(s) size if requested */
if( lwork==-1 ) {
LAPACK_cgelsd( &m, &n, &nrhs, a, &lda_t, b, &ldb_t, s, &rcond, rank,
work, &lwork, rwork, iwork, &info );
return (info<0) ? (info-1) : info;
 }
/* Allocate memory for temporary array(s) */
a_t= (lapack_complex_float*)
LAPACKE_malloc( sizeof(lapack_complex_float) *lda_t*MAX(1,n) );
if( a_t==NULL ) {
info=LAPACK_TRANSPOSE_MEMORY_ERROR;
 goto exit_level_0;
 }
b_t= (lapack_complex_float*)
LAPACKE_malloc( sizeof(lapack_complex_float) *
ldb_t*MAX(1,nrhs) );
if( b_t==NULL ) {
info=LAPACK_TRANSPOSE_MEMORY_ERROR;
 goto exit_level_1;
 }
/* Transpose input matrices */
LAPACKE_cge_trans( matrix_layout, m, n, a, lda, a_t, lda_t );
LAPACKE_cge_trans( matrix_layout, MAX(m,n), nrhs, b, ldb, b_t, ldb_t );
/* Call LAPACK function and adjust info */
LAPACK_cgelsd( &m, &n, &nrhs, a_t, &lda_t, b_t, &ldb_t, s, &rcond, rank,
work, &lwork, rwork, iwork, &info );
if( info<0 ) {
info=info-1;
 }
/* Transpose output matrices */
LAPACKE_cge_trans( LAPACK_COL_MAJOR, m, n, a_t, lda_t, a, lda );
LAPACKE_cge_trans( LAPACK_COL_MAJOR, MAX(m,n), nrhs, b_t, ldb_t, b,
ldb );
/* Release memory and exit */
LAPACKE_free( b_t );
exit_level_1:
LAPACKE_free( a_t );
exit_level_0:
if( info==LAPACK_TRANSPOSE_MEMORY_ERROR ) {
LAPACKE_xerbla( "LAPACKE_cgelsd_work", info );
 }
 } else {
info=-1;
LAPACKE_xerbla( "LAPACKE_cgelsd_work", info );
 }
returninfo;
}