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source_rot.h

/* blas/source_rot.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 2 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);
  for (i = 0; i < N; i++) {
    const BASE x = X[ix];
    const BASE y = Y[iy];
    X[ix] = c * x + s * y;
    Y[iy] = -s * x + c * y;
    ix += incX;
    iy += incY;
  }
}

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