lapacke_dgesvx.c

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

#include "lapacke_utils.h"

lapack_int LAPACKE_dgesvx( int matrix_layout, char fact, char trans,
                           lapack_int n, lapack_int nrhs, double* a,
                           lapack_int lda, double* af, lapack_int ldaf,
                           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_dgesvx", -1 );
        return -1;
    }
#ifndef LAPACK_DISABLE_NAN_CHECK
    /* Optionally check input matrices for NaNs */
    if( LAPACKE_dge_nancheck( matrix_layout, n, n, a, lda ) ) {
        return -6;
    }
    if( LAPACKE_lsame( fact, 'f' ) ) {
        if( LAPACKE_dge_nancheck( matrix_layout, n, n, af, ldaf ) ) {
            return -8;
        }
    }
    if( LAPACKE_dge_nancheck( matrix_layout, n, nrhs, b, ldb ) ) {
        return -14;
    }
    if( LAPACKE_lsame( fact, 'f' ) && ( LAPACKE_lsame( *equed, 'b' ) ||
        LAPACKE_lsame( *equed, 'c' ) ) ) {
        if( LAPACKE_d_nancheck( n, c, 1 ) ) {
            return -13;
        }
    }
    if( LAPACKE_lsame( fact, 'f' ) && ( LAPACKE_lsame( *equed, 'b' ) ||
        LAPACKE_lsame( *equed, 'r' ) ) ) {
        if( LAPACKE_d_nancheck( n, r, 1 ) ) {
            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(1,4*n) );
    if( work == NULL ) {
        info = LAPACK_WORK_MEMORY_ERROR;
        goto exit_level_1;
    }
    /* Call middle-level interface */
    info = LAPACKE_dgesvx_work( matrix_layout, fact, trans, n, nrhs, a, lda, af,
                                ldaf, 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_dgesvx", info );
    }
    return info;
}