lapacke_dgerfs.c

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* Contents: Native high-level C interface to LAPACK function dgerfs
* Author: Intel Corporation
* Generated October, 2010
*****************************************************************************/

#include "lapacke.h"
#include "lapacke_utils.h"

lapack_int LAPACKE_dgerfs( int matrix_order, char trans, lapack_int n,
                           lapack_int nrhs, const double* a, lapack_int lda,
                           const double* af, lapack_int ldaf,
                           const lapack_int* ipiv, const double* b,
                           lapack_int ldb, double* x, lapack_int ldx,
                           double* ferr, double* berr )
{
    lapack_int info = 0;
    lapack_int* iwork = NULL;
    double* work = NULL;
    if( matrix_order != LAPACK_COL_MAJOR && matrix_order != LAPACK_ROW_MAJOR ) {
        LAPACKE_xerbla( "LAPACKE_dgerfs", -1 );
        return -1;
    }
#ifndef LAPACK_DISABLE_NAN_CHECK
    /* Optionally check input matrices for NaNs */
    if( LAPACKE_dge_nancheck( matrix_order, n, n, a, lda ) ) {
        return -5;
    }
    if( LAPACKE_dge_nancheck( matrix_order, n, n, af, ldaf ) ) {
        return -7;
    }
    if( LAPACKE_dge_nancheck( matrix_order, n, nrhs, b, ldb ) ) {
        return -10;
    }
    if( LAPACKE_dge_nancheck( matrix_order, 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 = (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_dgerfs_work( matrix_order, trans, n, nrhs, a, lda, af, ldaf,
                                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_dgerfs", info );
    }
    return info;
}