| /* blas/source_herk.h |
| * |
| * Copyright (C) 2001 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 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, k; |
| int uplo, trans; |
| |
| if (beta == 1.0 && (alpha == 0.0 || K == 0)) |
| return; |
| |
| if (Order == CblasRowMajor) { |
| uplo = Uplo; |
| trans = Trans; |
| } else { |
| uplo = (Uplo == CblasUpper) ? CblasLower : CblasUpper; |
| trans = (Trans == CblasNoTrans) ? CblasConjTrans : CblasNoTrans; |
| } |
| |
| /* form y := beta*y */ |
| if (beta == 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 != 1.0) { |
| if (uplo == CblasUpper) { |
| for (i = 0; i < N; i++) { |
| REAL(C, ldc * i + i) *= beta; |
| IMAG(C, ldc * i + i) = 0; |
| for (j = i + 1; j < N; j++) { |
| REAL(C, ldc * i + j) *= beta; |
| IMAG(C, ldc * i + j) *= beta; |
| } |
| } |
| } else { |
| for (i = 0; i < N; i++) { |
| for (j = 0; j < i; j++) { |
| REAL(C, ldc * i + j) *= beta; |
| IMAG(C, ldc * i + j) *= beta; |
| } |
| REAL(C, ldc * i + i) *= beta; |
| IMAG(C, ldc * i + i) = 0; |
| } |
| } |
| } else { |
| /* set imaginary part of Aii to zero */ |
| for (i = 0; i < N; i++) { |
| IMAG(C, ldc * i + i) = 0.0; |
| } |
| } |
| |
| if (alpha == 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 * temp_real; |
| IMAG(C, i * ldc + j) += alpha * temp_imag; |
| } |
| } |
| |
| } else if (uplo == CblasUpper && trans == CblasConjTrans) { |
| |
| 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 * temp_real; |
| IMAG(C, i * ldc + j) += alpha * temp_imag; |
| } |
| } |
| |
| } 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 * temp_real; |
| IMAG(C, i * ldc + j) += alpha * temp_imag; |
| } |
| } |
| |
| } else if (uplo == CblasLower && trans == CblasConjTrans) { |
| |
| 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 * temp_real; |
| IMAG(C, i * ldc + j) += alpha * temp_imag; |
| } |
| } |
| |
| } else { |
| BLAS_ERROR("unrecognized operation"); |
| } |
| } |