| /* blas/source_spr2.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, j; |
| |
| if (N == 0) |
| return; |
| |
| if (alpha == 0.0) |
| return; |
| |
| if ((order == CblasRowMajor && Uplo == CblasUpper) |
| || (order == CblasColMajor && Uplo == CblasLower)) { |
| INDEX ix = OFFSET(N, incX); |
| INDEX iy = OFFSET(N, incY); |
| for (i = 0; i < N; i++) { |
| const BASE tmp1 = alpha * X[ix]; |
| const BASE tmp2 = alpha * Y[iy]; |
| INDEX jx = ix; |
| INDEX jy = iy; |
| for (j = i; j < N; j++) { |
| Ap[TPUP(N, i, j)] += tmp1 * Y[jy] + tmp2 * X[jx]; |
| jx += incX; |
| jy += incY; |
| } |
| ix += incX; |
| iy += incY; |
| } |
| } else if ((order == CblasRowMajor && Uplo == CblasLower) |
| || (order == CblasColMajor && Uplo == CblasUpper)) { |
| INDEX ix = OFFSET(N, incX); |
| INDEX iy = OFFSET(N, incY); |
| for (i = 0; i < N; i++) { |
| const BASE tmp1 = alpha * X[ix]; |
| const BASE tmp2 = alpha * Y[iy]; |
| INDEX jx = OFFSET(N, incX); |
| INDEX jy = OFFSET(N, incY); |
| for (j = 0; j <= i; j++) { |
| Ap[TPLO(N, i, j)] += tmp1 * Y[jy] + tmp2 * X[jx]; |
| jx += incX; |
| jy += incY; |
| } |
| ix += incX; |
| iy += incY; |
| } |
| } else { |
| BLAS_ERROR("unrecognized operation"); |
| } |
| } |
