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/* blas/source_axpy_r.h
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*
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* Copyright (C) 1996, 1997, 1998, 1999, 2000 Gerard Jungman
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or (at
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* your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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{
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INDEX i;
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if (alpha == 0.0) {
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return;
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}
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if (incX == 1 && incY == 1) {
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const INDEX m = N % 4;
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for (i = 0; i < m; i++) {
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Y[i] += alpha * X[i];
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}
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for (i = m; i + 3 < N; i += 4) {
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Y[i] += alpha * X[i];
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Y[i + 1] += alpha * X[i + 1];
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Y[i + 2] += alpha * X[i + 2];
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Y[i + 3] += alpha * X[i + 3];
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}
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} else {
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INDEX ix = OFFSET(N, incX);
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INDEX iy = OFFSET(N, incY);
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for (i = 0; i < N; i++) {
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Y[iy] += alpha * X[ix];
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ix += incX;
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iy += incY;
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}
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}
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}
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