lapacke_sgesvj.c

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* Contents: Native high-level C interface to LAPACK function sgesvj
* Author: Intel Corporation
*****************************************************************************/
 
#include "lapacke_utils.h"
 
lapack_int LAPACKE_sgesvj( int matrix_layout, char joba, char jobu, char jobv,
                           lapack_int m, lapack_int n, float* a, lapack_int lda,
                           float* sva, lapack_int mv, float* v, lapack_int ldv,
                           float* stat )
{
    lapack_int info = 0;
    lapack_int lwork = MAX(6,m+n);
    float* work = NULL;
    lapack_int i;
    lapack_int nrows_v;
    if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
        LAPACKE_xerbla( "LAPACKE_sgesvj", -1 );
        return -1;
    }
#ifndef LAPACK_DISABLE_NAN_CHECK
    if( LAPACKE_get_nancheck() ) {
        /* Optionally check input matrices for NaNs */
        nrows_v = LAPACKE_lsame( jobv, 'v' ) ? MAX(0,n) :
                ( LAPACKE_lsame( jobv, 'a' ) ? MAX(0,mv) : 0 );
        if( LAPACKE_sge_nancheck( matrix_layout, m, n, a, lda ) ) {
            return -7;
        }
        if( LAPACKE_lsame( jobv, 'a' ) || LAPACKE_lsame( jobv, 'v' ) ) {
            if( LAPACKE_sge_nancheck( matrix_layout, nrows_v, n, v, ldv ) ) {
                return -11;
            }
        }
    }
#endif
    /* Allocate memory for working array(s) */
    work = (float*)LAPACKE_malloc( sizeof(float) * lwork );
    if( work == NULL ) {
        info = LAPACK_WORK_MEMORY_ERROR;
        goto exit_level_0;
    }
    work[0] = stat[0];  /* Significant if jobu = 'c' */
    /* Call middle-level interface */
    info = LAPACKE_sgesvj_work( matrix_layout, joba, jobu, jobv, m, n, a, lda,
                                sva, mv, v, ldv, work, lwork );
    /* Backup significant data from working array(s) */
    for( i=0; i<6; i++ ) {
        stat[i] = work[i];
    }
    /* Release memory and exit */
    LAPACKE_free( work );
exit_level_0:
    if( info == LAPACK_WORK_MEMORY_ERROR ) {
        LAPACKE_xerbla( "LAPACKE_sgesvj", info );
    }
    return info;
}