123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130 |
- /* blas/source_syr2k_r.h
- *
- * Copyright (C) 2001, 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 i, j, k;
- int uplo, trans;
- if (alpha == 0.0 && beta == 1.0)
- return;
- if (Order == CblasRowMajor) {
- uplo = Uplo;
- trans = (Trans == CblasConjTrans) ? CblasTrans : Trans;
- } else {
- uplo = (Uplo == CblasUpper) ? CblasLower : CblasUpper;
- if (Trans == CblasTrans || Trans == CblasConjTrans) {
- trans = CblasNoTrans;
- } else {
- trans = CblasTrans;
- }
- }
- /* form C := beta*C */
- if (beta == 0.0) {
- if (uplo == CblasUpper) {
- for (i = 0; i < N; i++) {
- for (j = i; j < N; j++) {
- C[ldc * i + j] = 0.0;
- }
- }
- } else {
- for (i = 0; i < N; i++) {
- for (j = 0; j <= i; j++) {
- C[ldc * i + j] = 0.0;
- }
- }
- }
- } else if (beta != 1.0) {
- if (uplo == CblasUpper) {
- for (i = 0; i < N; i++) {
- for (j = i; j < N; j++) {
- C[ldc * i + j] *= beta;
- }
- }
- } else {
- for (i = 0; i < N; i++) {
- for (j = 0; j <= i; j++) {
- C[ldc * i + j] *= beta;
- }
- }
- }
- }
- if (alpha == 0.0)
- return;
- if (uplo == CblasUpper && trans == CblasNoTrans) {
- for (i = 0; i < N; i++) {
- for (j = i; j < N; j++) {
- BASE temp = 0.0;
- for (k = 0; k < K; k++) {
- temp += (A[i * lda + k] * B[j * ldb + k]
- + B[i * ldb + k] * A[j * lda + k]);
- }
- C[i * ldc + j] += alpha * temp;
- }
- }
- } else if (uplo == CblasUpper && trans == CblasTrans) {
- for (k = 0; k < K; k++) {
- for (i = 0; i < N; i++) {
- BASE temp1 = alpha * A[k * lda + i];
- BASE temp2 = alpha * B[k * ldb + i];
- for (j = i; j < N; j++) {
- C[i * lda + j] += temp1 * B[k * ldb + j] + temp2 * A[k * lda + j];
- }
- }
- }
- } else if (uplo == CblasLower && trans == CblasNoTrans) {
- for (i = 0; i < N; i++) {
- for (j = 0; j <= i; j++) {
- BASE temp = 0.0;
- for (k = 0; k < K; k++) {
- temp += (A[i * lda + k] * B[j * ldb + k]
- + B[i * ldb + k] * A[j * lda + k]);
- }
- C[i * ldc + j] += alpha * temp;
- }
- }
- } else if (uplo == CblasLower && trans == CblasTrans) {
- for (k = 0; k < K; k++) {
- for (i = 0; i < N; i++) {
- BASE temp1 = alpha * A[k * lda + i];
- BASE temp2 = alpha * B[k * ldb + i];
- for (j = 0; j <= i; j++) {
- C[i * lda + j] += temp1 * B[k * ldb + j] + temp2 * A[k * lda + j];
- }
- }
- }
- } else {
- BLAS_ERROR("unrecognized operation");
- }
- }
|