lapacke_spbrfs.c

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* Contents: Native high-level C interface to LAPACK function spbrfs
* Author: Intel Corporation
*****************************************************************************/
 
#include "lapacke_utils.h"
 
lapack_int LAPACKE_spbrfs( int matrix_layout, char uplo, lapack_int n,
                           lapack_int kd, lapack_int nrhs, const float* ab,
                           lapack_int ldab, const float* afb, lapack_int ldafb,
                           const float* b, lapack_int ldb, float* x,
                           lapack_int ldx, float* ferr, float* berr )
{
    lapack_int info = 0;
    lapack_int* iwork = NULL;
    float* work = NULL;
    if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
        LAPACKE_xerbla( "LAPACKE_spbrfs", -1 );
        return -1;
    }
#ifndef LAPACK_DISABLE_NAN_CHECK
    if( LAPACKE_get_nancheck() ) {
        /* Optionally check input matrices for NaNs */
        if( LAPACKE_spb_nancheck( matrix_layout, uplo, n, kd, ab, ldab ) ) {
            return -6;
        }
        if( LAPACKE_spb_nancheck( matrix_layout, uplo, n, kd, afb, ldafb ) ) {
            return -8;
        }
        if( LAPACKE_sge_nancheck( matrix_layout, n, nrhs, b, ldb ) ) {
            return -10;
        }
        if( LAPACKE_sge_nancheck( matrix_layout, n, nrhs, x, ldx ) ) {
            return -12;
        }
    }
#endif
    /* Allocate memory for working array(s) */
    iwork = (lapack_int*)LAPACKE_malloc( sizeof(lapack_int) * MAX(1,n) );
    if( iwork == NULL ) {
        info = LAPACK_WORK_MEMORY_ERROR;
        goto exit_level_0;
    }
    work = (float*)LAPACKE_malloc( sizeof(float) * MAX(1,3*n) );
    if( work == NULL ) {
        info = LAPACK_WORK_MEMORY_ERROR;
        goto exit_level_1;
    }
    /* Call middle-level interface */
    info = LAPACKE_spbrfs_work( matrix_layout, uplo, n, kd, nrhs, ab, ldab, afb,
                                ldafb, b, ldb, x, ldx, ferr, berr, work,
                                iwork );
    /* Release memory and exit */
    LAPACKE_free( work );
exit_level_1:
    LAPACKE_free( iwork );
exit_level_0:
    if( info == LAPACK_WORK_MEMORY_ERROR ) {
        LAPACKE_xerbla( "LAPACKE_spbrfs", info );
    }
    return info;
}