/* blas/source_rotmg.h * * Copyright (C) 1996, 1997, 1998, 1999, 2000, 2007 Brian Gough * * 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 3 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 n; INDEX i = OFFSET(N, incX); INDEX j = OFFSET(N, incY); BASE h11, h21, h12, h22; if (P[0] == -1.0) { h11 = P[1]; h21 = P[2]; h12 = P[3]; h22 = P[4]; } else if (P[0] == 0.0) { h11 = 1.0; h21 = P[2]; h12 = P[3]; h22 = 1.0; } else if (P[0] == 1.0) { h11 = P[1]; h21 = -1.0; h12 = 1.0; h22 = P[4]; } else if (P[0] == -2.0) { return; } else { BLAS_ERROR("unrecognized value of P[0]"); return; } for (n = 0; n < N; n++) { const BASE w = X[i]; const BASE z = Y[j]; X[i] = h11 * w + h12 * z; Y[j] = h21 * w + h22 * z; i += incX; j += incY; } }

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