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/* blas/source_axpy_r.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;
if (alpha == 0.0) {
return;
}
if (incX == 1 && incY == 1) {
const INDEX m = N % 4;
for (i = 0; i < m; i++) {
Y[i] += alpha * X[i];
}
for (i = m; i + 3 < N; i += 4) {
Y[i] += alpha * X[i];
Y[i + 1] += alpha * X[i + 1];
Y[i + 2] += alpha * X[i + 2];
Y[i + 3] += alpha * X[i + 3];
}
} else {
INDEX ix = OFFSET(N, incX);
INDEX iy = OFFSET(N, incY);
for (i = 0; i < N; i++) {
Y[iy] += alpha * X[ix];
ix += incX;
iy += incY;
}
}
}
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