/* blas/source_gerc.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, j;

  CHECK_ARGS10(CZ_GERC,order,M,N,alpha,X,incX,Y,incY,A,lda);

  {

    const BASE alpha_real = CONST_REAL0(alpha);

    const BASE alpha_imag = CONST_IMAG0(alpha);

    if (order == CblasRowMajor) {

      INDEX ix = OFFSET(M, incX);

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

        const BASE X_real = CONST_REAL(X, ix);

        const BASE X_imag = CONST_IMAG(X, ix);

        const BASE tmp_real = alpha_real * X_real - alpha_imag * X_imag;

        const BASE tmp_imag = alpha_imag * X_real + alpha_real * X_imag;

        INDEX jy = OFFSET(N, incY);

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

          const BASE Y_real = CONST_REAL(Y, jy);

          const BASE Y_imag = -CONST_IMAG(Y, jy);

          REAL(A, lda * i + j) += Y_real * tmp_real - Y_imag * tmp_imag;

          IMAG(A, lda * i + j) += Y_imag * tmp_real + Y_real * tmp_imag;

          jy += incY;

        }

        ix += incX;

      }

    } else if (order == CblasColMajor) {

      INDEX jy = OFFSET(N, incY);

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

        const BASE Y_real = CONST_REAL(Y, jy);

        const BASE Y_imag = -CONST_IMAG(Y, jy);

        const BASE tmp_real = alpha_real * Y_real - alpha_imag * Y_imag;

        const BASE tmp_imag = alpha_imag * Y_real + alpha_real * Y_imag;

        INDEX ix = OFFSET(M, incX);

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

          const BASE X_real = CONST_REAL(X, ix);

          const BASE X_imag = CONST_IMAG(X, ix);

          REAL(A, i + lda * j) += X_real * tmp_real - X_imag * tmp_imag;

          IMAG(A, i + lda * j) += X_imag * tmp_real + X_real * tmp_imag;

          ix += incX;

        }

        jy += incY;

      }

    } else {

      BLAS_ERROR("unrecognized operation");

    }

  }

}