lapacke_dlapmr_work.c

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* Contents: Native middle-level C interface to LAPACK function dlapmr
* Author: Intel Corporation
*****************************************************************************/
 
#include "lapacke_utils.h"
 
lapack_int LAPACKE_dlapmr_work( int matrix_layout, lapack_logical forwrd,
                                lapack_int m, lapack_int n, double* x,
                                lapack_int ldx, lapack_int* k )
{
    lapack_int info = 0;
    if( matrix_layout == LAPACK_COL_MAJOR ) {
        /* Call LAPACK function and adjust info */
        LAPACK_dlapmr( &forwrd, &m, &n, x, &ldx, k );
        if( info < 0 ) {
            info = info - 1;
        }
    } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
        lapack_int ldx_t = MAX(1,m);
        double* x_t = NULL;
        /* Check leading dimension(s) */
        if( ldx < n ) {
            info = -6;
            LAPACKE_xerbla( "LAPACKE_dlapmr_work", info );
            return info;
        }
        /* Allocate memory for temporary array(s) */
        x_t = (double*)LAPACKE_malloc( sizeof(double) * ldx_t * MAX(1,n) );
        if( x_t == NULL ) {
            info = LAPACK_TRANSPOSE_MEMORY_ERROR;
            goto exit_level_0;
        }
        /* Transpose input matrices */
        LAPACKE_dge_trans( matrix_layout, m, n, x, ldx, x_t, ldx_t );
        /* Call LAPACK function and adjust info */
        LAPACK_dlapmr( &forwrd, &m, &n, x_t, &ldx_t, k );
        info = 0;  /* LAPACK call is ok! */
        /* Transpose output matrices */
        LAPACKE_dge_trans( LAPACK_COL_MAJOR, m, n, x_t, ldx_t, x, ldx );
        /* Release memory and exit */
        LAPACKE_free( x_t );
exit_level_0:
        if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
            LAPACKE_xerbla( "LAPACKE_dlapmr_work", info );
        }
    } else {
        info = -1;
        LAPACKE_xerbla( "LAPACKE_dlapmr_work", info );
    }
    return info;
}