lapacke_zge_trans.c

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* Contents: Native C interface to LAPACK utility function
* Author: Intel Corporation
* Created in February, 2010
*****************************************************************************/

#include "lapacke_utils.h"

/* Converts input general matrix from row-major(C) to column-major(Fortran)
 * layout or vice versa.
 */

void LAPACKE_zge_trans( int matrix_order, lapack_int m, lapack_int n,
                        const lapack_complex_double* in, lapack_int ldin,
                        lapack_complex_double* out, lapack_int ldout )
{
    lapack_int i, j, x, y;

    if( in == NULL || out == NULL ) return;

    if( matrix_order == LAPACK_COL_MAJOR ) {
        x = n;
        y = m;
    } else if ( matrix_order == LAPACK_ROW_MAJOR ) {
        x = m;
        y = n;
    } else {
        /* Unknown input layout */
        return;
    }

    /* In case of incorrect m, n, ldin or ldout the function does nothing */
    for( i = 0; i < MIN( y, ldin ); i++ ) {
        for( j = 0; j < MIN( x, ldout ); j++ ) {
            out[ (size_t)i*ldout + j ] = in[ (size_t)j*ldin + i ];
        }
    }
}