| /* 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; |
| } |
| } |
| } |
