lapacke_dsysvx.c

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* Contents: Native high-level C interface to LAPACK function dsysvx
* Author: Intel Corporation
* Generated November 2015
*****************************************************************************/
 
#include "lapacke_utils.h"
 
lapack_int LAPACKE_dsysvx( int matrix_layout, char fact, char uplo, lapack_int n,
                           lapack_int nrhs, const double* a, lapack_int lda,
                           double* af, lapack_int ldaf, lapack_int* ipiv,
                           const double* b, lapack_int ldb, double* x,
                           lapack_int ldx, double* rcond, double* ferr,
                           double* berr )
{
    lapack_int info = 0;
    lapack_int lwork = -1;
    lapack_int* iwork = NULL;
    double* work = NULL;
    double work_query;
    if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
        LAPACKE_xerbla( "LAPACKE_dsysvx", -1 );
        return -1;
    }
#ifndef LAPACK_DISABLE_NAN_CHECK
    if( LAPACKE_get_nancheck() ) {
        /* Optionally check input matrices for NaNs */
        if( LAPACKE_dsy_nancheck( matrix_layout, uplo, n, a, lda ) ) {
            return -6;
        }
        if( LAPACKE_lsame( fact, 'f' ) ) {
            if( LAPACKE_dsy_nancheck( matrix_layout, uplo, n, af, ldaf ) ) {
                return -8;
            }
        }
        if( LAPACKE_dge_nancheck( matrix_layout, n, nrhs, b, ldb ) ) {
            return -11;
        }
    }
#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;
    }
    /* Query optimal working array(s) size */
    info = LAPACKE_dsysvx_work( matrix_layout, fact, uplo, n, nrhs, a, lda, af,
                                ldaf, ipiv, b, ldb, x, ldx, rcond, ferr, berr,
                                &work_query, lwork, iwork );
    if( info != 0 ) {
        goto exit_level_1;
    }
    lwork = (lapack_int)work_query;
    /* Allocate memory for work arrays */
    work = (double*)LAPACKE_malloc( sizeof(double) * lwork );
    if( work == NULL ) {
        info = LAPACK_WORK_MEMORY_ERROR;
        goto exit_level_1;
    }
    /* Call middle-level interface */
    info = LAPACKE_dsysvx_work( matrix_layout, fact, uplo, n, nrhs, a, lda, af,
                                ldaf, ipiv, b, ldb, x, ldx, rcond, ferr, berr,
                                work, lwork, 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_dsysvx", info );
    }
    return info;
}