/* 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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