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diff --git a/gsl-1.9/cblas/source_gemv_r.h b/gsl-1.9/cblas/source_gemv_r.h
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+/* blas/source_gemv_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, j;
+ INDEX lenX, lenY;
+
+ const int Trans = (TransA != CblasConjTrans) ? TransA : CblasTrans;
+
+ if (M == 0 || N == 0)
+ return;
+
+ if (alpha == 0.0 && beta == 1.0)
+ return;
+
+ if (Trans == CblasNoTrans) {
+ lenX = N;
+ lenY = M;
+ } else {
+ lenX = M;
+ lenY = N;
+ }
+
+ /* form y := beta*y */
+ if (beta == 0.0) {
+ INDEX iy = OFFSET(lenY, incY);
+ for (i = 0; i < lenY; i++) {
+ Y[iy] = 0.0;
+ iy += incY;
+ }
+ } else if (beta != 1.0) {
+ INDEX iy = OFFSET(lenY, incY);
+ for (i = 0; i < lenY; i++) {
+ Y[iy] *= beta;
+ iy += incY;
+ }
+ }
+
+ if (alpha == 0.0)
+ return;
+
+ if ((order == CblasRowMajor && Trans == CblasNoTrans)
+ || (order == CblasColMajor && Trans == CblasTrans)) {
+ /* form y := alpha*A*x + y */
+ INDEX iy = OFFSET(lenY, incY);
+ for (i = 0; i < lenY; i++) {
+ BASE temp = 0.0;
+ INDEX ix = OFFSET(lenX, incX);
+ for (j = 0; j < lenX; j++) {
+ temp += X[ix] * A[lda * i + j];
+ ix += incX;
+ }
+ Y[iy] += alpha * temp;
+ iy += incY;
+ }
+ } else if ((order == CblasRowMajor && Trans == CblasTrans)
+ || (order == CblasColMajor && Trans == CblasNoTrans)) {
+ /* form y := alpha*A'*x + y */
+ INDEX ix = OFFSET(lenX, incX);
+ for (j = 0; j < lenX; j++) {
+ const BASE temp = alpha * X[ix];
+ if (temp != 0.0) {
+ INDEX iy = OFFSET(lenY, incY);
+ for (i = 0; i < lenY; i++) {
+ Y[iy] += temp * A[lda * j + i];
+ iy += incY;
+ }
+ }
+ ix += incX;
+ }
+ } else {
+ BLAS_ERROR("unrecognized operation");
+ }
+}