lapacke_sggbal.c

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* Contents: Native high-level C interface to LAPACK function sggbal
* Author: Intel Corporation
*****************************************************************************/
 
#include "lapacke_utils.h"
 
lapack_int LAPACKE_sggbal( int matrix_layout, char job, lapack_int n, float* a,
                           lapack_int lda, float* b, lapack_int ldb,
                           lapack_int* ilo, lapack_int* ihi, float* lscale,
                           float* rscale )
{
    lapack_int info = 0;
    /* Additional scalars declarations for work arrays */
    lapack_int lwork;
    float* work = NULL;
    if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
        LAPACKE_xerbla( "LAPACKE_sggbal", -1 );
        return -1;
    }
#ifndef LAPACK_DISABLE_NAN_CHECK
    if( LAPACKE_get_nancheck() ) {
        /* Optionally check input matrices for NaNs */
        if( LAPACKE_lsame( job, 'p' ) || LAPACKE_lsame( job, 's' ) ||
            LAPACKE_lsame( job, 'b' ) ) {
            if( LAPACKE_sge_nancheck( matrix_layout, n, n, a, lda ) ) {
                return -4;
            }
        }
        if( LAPACKE_lsame( job, 'p' ) || LAPACKE_lsame( job, 's' ) ||
            LAPACKE_lsame( job, 'b' ) ) {
            if( LAPACKE_sge_nancheck( matrix_layout, n, n, b, ldb ) ) {
                return -6;
            }
        }
    }
#endif
    /* Additional scalars initializations for work arrays */
    if( LAPACKE_lsame( job, 's' ) || LAPACKE_lsame( job, 'b' ) ) {
        lwork = MAX(1,6*n);
    } else {
        lwork = 1;
    }
    /* 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;
    }
    /* Call middle-level interface */
    info = LAPACKE_sggbal_work( matrix_layout, job, n, a, lda, b, ldb, ilo, ihi,
                                lscale, rscale, work );
    /* Release memory and exit */
    LAPACKE_free( work );
exit_level_0:
    if( info == LAPACK_WORK_MEMORY_ERROR ) {
        LAPACKE_xerbla( "LAPACKE_sggbal", info );
    }
    return info;
}