lapacke_sgbrfs.c

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* Contents: Native high-level C interface to LAPACK function sgbrfs
* Author: Intel Corporation
* Generated November 2015
*****************************************************************************/

#include "lapacke_utils.h"

lapack_int LAPACKE_sgbrfs( int matrix_layout, char trans, lapack_int n,
                           lapack_int kl, lapack_int ku, lapack_int nrhs,
                           const float* ab, lapack_int ldab, const float* afb,
                           lapack_int ldafb, const lapack_int* ipiv,
                           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_sgbrfs", -1 );
        return -1;
    }
#ifndef LAPACK_DISABLE_NAN_CHECK
    /* Optionally check input matrices for NaNs */
    if( LAPACKE_sgb_nancheck( matrix_layout, n, n, kl, ku, ab, ldab ) ) {
        return -7;
    }
    if( LAPACKE_sgb_nancheck( matrix_layout, n, n, kl, kl+ku, afb, ldafb ) ) {
        return -9;
    }
    if( LAPACKE_sge_nancheck( matrix_layout, n, nrhs, b, ldb ) ) {
        return -12;
    }
    if( LAPACKE_sge_nancheck( matrix_layout, n, nrhs, x, ldx ) ) {
        return -14;
    }
#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_sgbrfs_work( matrix_layout, trans, n, kl, ku, nrhs, ab, ldab,
                                afb, ldafb, ipiv, 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_sgbrfs", info );
    }
    return info;
}