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- /* blas/source_syrk_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;
- const BASE alpha_real = CONST_REAL0(alpha);
- const BASE alpha_imag = CONST_IMAG0(alpha);
- const BASE beta_real = CONST_REAL0(beta);
- const BASE beta_imag = CONST_IMAG0(beta);
- if ((alpha_real == 0.0 && alpha_imag == 0.0)
- && (beta_real == 1.0 && beta_imag == 0.0))
- return;
- if (Order == CblasRowMajor) {
- uplo = Uplo;
- /* FIXME: original blas does not make distinction between Trans and ConjTrans?? */
- trans = (Trans == CblasNoTrans) ? CblasNoTrans : CblasTrans;
- } else {
- uplo = (Uplo == CblasUpper) ? CblasLower : CblasUpper;
- trans = (Trans == CblasNoTrans) ? CblasTrans : CblasNoTrans;
- }
- /* form y := beta*y */
- if (beta_real == 0.0 && beta_imag == 0.0) {
- if (uplo == CblasUpper) {
- for (i = 0; i < N; i++) {
- for (j = i; j < N; j++) {
- REAL(C, ldc * i + j) = 0.0;
- IMAG(C, ldc * i + j) = 0.0;
- }
- }
- } else {
- for (i = 0; i < N; i++) {
- for (j = 0; j <= i; j++) {
- REAL(C, ldc * i + j) = 0.0;
- IMAG(C, ldc * i + j) = 0.0;
- }
- }
- }
- } else if (!(beta_real == 1.0 && beta_imag == 0.0)) {
- if (uplo == CblasUpper) {
- for (i = 0; i < N; i++) {
- for (j = i; j < N; j++) {
- const BASE Cij_real = REAL(C, ldc * i + j);
- const BASE Cij_imag = IMAG(C, ldc * i + j);
- REAL(C, ldc * i + j) = beta_real * Cij_real - beta_imag * Cij_imag;
- IMAG(C, ldc * i + j) = beta_real * Cij_imag + beta_imag * Cij_real;
- }
- }
- } else {
- for (i = 0; i < N; i++) {
- for (j = 0; j <= i; j++) {
- const BASE Cij_real = REAL(C, ldc * i + j);
- const BASE Cij_imag = IMAG(C, ldc * i + j);
- REAL(C, ldc * i + j) = beta_real * Cij_real - beta_imag * Cij_imag;
- IMAG(C, ldc * i + j) = beta_real * Cij_imag + beta_imag * Cij_real;
- }
- }
- }
- }
- if (alpha_real == 0.0 && alpha_imag == 0.0)
- return;
- if (uplo == CblasUpper && trans == CblasNoTrans) {
- for (i = 0; i < N; i++) {
- for (j = i; j < N; j++) {
- BASE temp_real = 0.0;
- BASE temp_imag = 0.0;
- for (k = 0; k < K; k++) {
- const BASE Aik_real = CONST_REAL(A, i * lda + k);
- const BASE Aik_imag = CONST_IMAG(A, i * lda + k);
- const BASE Ajk_real = CONST_REAL(A, j * lda + k);
- const BASE Ajk_imag = CONST_IMAG(A, j * lda + k);
- temp_real += Aik_real * Ajk_real - Aik_imag * Ajk_imag;
- temp_imag += Aik_real * Ajk_imag + Aik_imag * Ajk_real;
- }
- REAL(C, i * ldc + j) += alpha_real * temp_real - alpha_imag * temp_imag;
- IMAG(C, i * ldc + j) += alpha_real * temp_imag + alpha_imag * temp_real;
- }
- }
- } else if (uplo == CblasUpper && trans == CblasTrans) {
- for (i = 0; i < N; i++) {
- for (j = i; j < N; j++) {
- BASE temp_real = 0.0;
- BASE temp_imag = 0.0;
- for (k = 0; k < K; k++) {
- const BASE Aki_real = CONST_REAL(A, k * lda + i);
- const BASE Aki_imag = CONST_IMAG(A, k * lda + i);
- const BASE Akj_real = CONST_REAL(A, k * lda + j);
- const BASE Akj_imag = CONST_IMAG(A, k * lda + j);
- temp_real += Aki_real * Akj_real - Aki_imag * Akj_imag;
- temp_imag += Aki_real * Akj_imag + Aki_imag * Akj_real;
- }
- REAL(C, i * ldc + j) += alpha_real * temp_real - alpha_imag * temp_imag;
- IMAG(C, i * ldc + j) += alpha_real * temp_imag + alpha_imag * temp_real;
- }
- }
- } else if (uplo == CblasLower && trans == CblasNoTrans) {
- for (i = 0; i < N; i++) {
- for (j = 0; j <= i; j++) {
- BASE temp_real = 0.0;
- BASE temp_imag = 0.0;
- for (k = 0; k < K; k++) {
- const BASE Aik_real = CONST_REAL(A, i * lda + k);
- const BASE Aik_imag = CONST_IMAG(A, i * lda + k);
- const BASE Ajk_real = CONST_REAL(A, j * lda + k);
- const BASE Ajk_imag = CONST_IMAG(A, j * lda + k);
- temp_real += Aik_real * Ajk_real - Aik_imag * Ajk_imag;
- temp_imag += Aik_real * Ajk_imag + Aik_imag * Ajk_real;
- }
- REAL(C, i * ldc + j) += alpha_real * temp_real - alpha_imag * temp_imag;
- IMAG(C, i * ldc + j) += alpha_real * temp_imag + alpha_imag * temp_real;
- }
- }
- } else if (uplo == CblasLower && trans == CblasTrans) {
- for (i = 0; i < N; i++) {
- for (j = 0; j <= i; j++) {
- BASE temp_real = 0.0;
- BASE temp_imag = 0.0;
- for (k = 0; k < K; k++) {
- const BASE Aki_real = CONST_REAL(A, k * lda + i);
- const BASE Aki_imag = CONST_IMAG(A, k * lda + i);
- const BASE Akj_real = CONST_REAL(A, k * lda + j);
- const BASE Akj_imag = CONST_IMAG(A, k * lda + j);
- temp_real += Aki_real * Akj_real - Aki_imag * Akj_imag;
- temp_imag += Aki_real * Akj_imag + Aki_imag * Akj_real;
- }
- REAL(C, i * ldc + j) += alpha_real * temp_real - alpha_imag * temp_imag;
- IMAG(C, i * ldc + j) += alpha_real * temp_imag + alpha_imag * temp_real;
- }
- }
- } else {
- BLAS_ERROR("unrecognized operation");
- }
- }
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