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/* blas/source_spr.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, j;
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CHECK_ARGS7(SD_SPR,order,Uplo,N,alpha,X,incX,Ap);
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if (N == 0)
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return;
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if (alpha == 0.0)
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return;
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if ((order == CblasRowMajor && Uplo == CblasUpper)
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|| (order == CblasColMajor && Uplo == CblasLower)) {
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INDEX ix = OFFSET(N, incX);
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for (i = 0; i < N; i++) {
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const BASE tmp = alpha * X[ix];
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INDEX jx = ix;
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for (j = i; j < N; j++) {
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Ap[TPUP(N, i, j)] += X[jx] * tmp;
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jx += incX;
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}
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ix += incX;
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}
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} else if ((order == CblasRowMajor && Uplo == CblasLower)
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|| (order == CblasColMajor && Uplo == CblasUpper)) {
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INDEX ix = OFFSET(N, incX);
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for (i = 0; i < N; i++) {
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const BASE tmp = alpha * X[ix];
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INDEX jx = OFFSET(N, incX);
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for (j = 0; j <= i; j++) {
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Ap[TPLO(N, i, j)] += X[jx] * tmp;
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jx += incX;
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}
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ix += incX;
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}
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} else {
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BLAS_ERROR("unrecognized operation");
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}
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}
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