lapacke_dgbsvx.c

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

#include "lapacke_utils.h"

lapack_int LAPACKE_dgbsvx( int matrix_layout, char fact, char trans,
                           lapack_int n, lapack_int kl, lapack_int ku,
                           lapack_int nrhs, double* ab, lapack_int ldab,
                           double* afb, lapack_int ldafb, lapack_int* ipiv,
                           char* equed, double* r, double* c, double* b,
                           lapack_int ldb, double* x, lapack_int ldx,
                           double* rcond, double* ferr, double* berr,
                           double* rpivot )
{
    lapack_int info = 0;
    lapack_int* iwork = NULL;
    double* work = NULL;
    if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
        LAPACKE_xerbla( "LAPACKE_dgbsvx", -1 );
        return -1;
    }
#ifndef LAPACK_DISABLE_NAN_CHECK
    /* Optionally check input matrices for NaNs */
    if( LAPACKE_dgb_nancheck( matrix_layout, n, n, kl, ku, ab, ldab ) ) {
        return -8;
    }
    if( LAPACKE_lsame( fact, 'f' ) ) {
        if( LAPACKE_dgb_nancheck( matrix_layout, n, n, kl, kl+ku, afb,
            ldafb ) ) {
            return -10;
        }
    }
    if( LAPACKE_dge_nancheck( matrix_layout, n, nrhs, b, ldb ) ) {
        return -16;
    }
    if( LAPACKE_lsame( fact, 'f' ) && ( LAPACKE_lsame( *equed, 'b' ) ||
        LAPACKE_lsame( *equed, 'c' ) ) ) {
        if( LAPACKE_d_nancheck( n, c, 1 ) ) {
            return -15;
        }
    }
    if( LAPACKE_lsame( fact, 'f' ) && ( LAPACKE_lsame( *equed, 'b' ) ||
        LAPACKE_lsame( *equed, 'r' ) ) ) {
        if( LAPACKE_d_nancheck( n, r, 1 ) ) {
            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 = (double*)LAPACKE_malloc( sizeof(double) * MAX(1,3*n) );
    if( work == NULL ) {
        info = LAPACK_WORK_MEMORY_ERROR;
        goto exit_level_1;
    }
    /* Call middle-level interface */
    info = LAPACKE_dgbsvx_work( matrix_layout, fact, trans, n, kl, ku, nrhs, ab,
                                ldab, afb, ldafb, ipiv, equed, r, c, b, ldb, x,
                                ldx, rcond, ferr, berr, work, iwork );
    /* Backup significant data from working array(s) */
    *rpivot = work[0];
    /* 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_dgbsvx", info );
    }
    return info;
}