/* blas/source_axpy_c.h

 * 

 * Copyright (C) 1996, 1997, 1998, 1999, 2000 Gerard Jungman

 * 

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 3 of the License, or (at

 * your option) any later version.

 * 

 * This program is distributed in the hope that it will be useful, but

 * WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 * General Public License for more details.

 * 

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.

 */

{

  INDEX i;

  INDEX ix = OFFSET(N, incX);

  INDEX iy = OFFSET(N, incY);

  const BASE alpha_real = CONST_REAL0(alpha);

  const BASE alpha_imag = CONST_IMAG0(alpha);

  if (fabs(alpha_real) == 0 && fabs(alpha_imag) == 0) {

    return;

  }

  for (i = 0; i < N; i++) {

    const BASE x_real = CONST_REAL(X, ix);

    const BASE x_imag = CONST_IMAG(X, ix);

    REAL(Y, iy) += (alpha_real * x_real - alpha_imag * x_imag);

    IMAG(Y, iy) += (alpha_real * x_imag + alpha_imag * x_real);

    ix += incX;

    iy += incY;

  }

}