lapacke_cgeev.c

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

#include"lapacke_utils.h"

lapack_intLAPACKE_cgeev( intmatrix_layout, charjobvl, charjobvr,
lapack_intn, lapack_complex_float*a, lapack_intlda,
lapack_complex_float*w, lapack_complex_float*vl,
lapack_intldvl, lapack_complex_float*vr,
lapack_intldvr )
{
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_cgeev", -1 );
return-1;
 }
#ifndefLAPACK_DISABLE_NAN_CHECK
if( LAPACKE_get_nancheck() ) {
/* Optionally check input matrices for NaNs */
if( LAPACKE_cge_nancheck( matrix_layout, n, n, a, lda ) ) {
return-5;
 }
 }
#endif
/* Allocate memory for working array(s) */
rwork= (float*)LAPACKE_malloc( sizeof(float) *MAX(1,2*n) );
if( rwork==NULL ) {
info=LAPACK_WORK_MEMORY_ERROR;
 goto exit_level_0;
 }
/* Query optimal working array(s) size */
info=LAPACKE_cgeev_work( matrix_layout, jobvl, jobvr, n, a, lda, w, vl,
ldvl, vr, ldvr, &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_cgeev_work( matrix_layout, jobvl, jobvr, n, a, lda, w, vl,
ldvl, vr, ldvr, 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_cgeev", info );
 }
returninfo;
}