3 * Copyright (C) 2001, 2007 Brian Gough
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 3 of the License, or (at
8 * your option) any later version.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
24 if (beta == 1.0 && (alpha == 0.0 || K == 0))
27 if (Order == CblasRowMajor) {
31 uplo = (Uplo == CblasUpper) ? CblasLower : CblasUpper;
32 trans = (Trans == CblasNoTrans) ? CblasConjTrans : CblasNoTrans;
35 /* form y := beta*y */
37 if (uplo == CblasUpper) {
38 for (i = 0; i < N; i++) {
39 for (j = i; j < N; j++) {
40 REAL(C, ldc * i + j) = 0.0;
41 IMAG(C, ldc * i + j) = 0.0;
45 for (i = 0; i < N; i++) {
46 for (j = 0; j <= i; j++) {
47 REAL(C, ldc * i + j) = 0.0;
48 IMAG(C, ldc * i + j) = 0.0;
52 } else if (beta != 1.0) {
53 if (uplo == CblasUpper) {
54 for (i = 0; i < N; i++) {
55 REAL(C, ldc * i + i) *= beta;
56 IMAG(C, ldc * i + i) = 0;
57 for (j = i + 1; j < N; j++) {
58 REAL(C, ldc * i + j) *= beta;
59 IMAG(C, ldc * i + j) *= beta;
63 for (i = 0; i < N; i++) {
64 for (j = 0; j < i; j++) {
65 REAL(C, ldc * i + j) *= beta;
66 IMAG(C, ldc * i + j) *= beta;
68 REAL(C, ldc * i + i) *= beta;
69 IMAG(C, ldc * i + i) = 0;
73 /* set imaginary part of Aii to zero */
74 for (i = 0; i < N; i++) {
75 IMAG(C, ldc * i + i) = 0.0;
82 if (uplo == CblasUpper && trans == CblasNoTrans) {
84 for (i = 0; i < N; i++) {
85 for (j = i; j < N; j++) {
88 for (k = 0; k < K; k++) {
89 const BASE Aik_real = CONST_REAL(A, i * lda + k);
90 const BASE Aik_imag = CONST_IMAG(A, i * lda + k);
91 const BASE Ajk_real = CONST_REAL(A, j * lda + k);
92 const BASE Ajk_imag = -CONST_IMAG(A, j * lda + k);
93 temp_real += Aik_real * Ajk_real - Aik_imag * Ajk_imag;
94 temp_imag += Aik_real * Ajk_imag + Aik_imag * Ajk_real;
96 REAL(C, i * ldc + j) += alpha * temp_real;
97 IMAG(C, i * ldc + j) += alpha * temp_imag;
101 } else if (uplo == CblasUpper && trans == CblasConjTrans) {
103 for (i = 0; i < N; i++) {
104 for (j = i; j < N; j++) {
105 BASE temp_real = 0.0;
106 BASE temp_imag = 0.0;
107 for (k = 0; k < K; k++) {
108 const BASE Aki_real = CONST_REAL(A, k * lda + i);
109 const BASE Aki_imag = -CONST_IMAG(A, k * lda + i);
110 const BASE Akj_real = CONST_REAL(A, k * lda + j);
111 const BASE Akj_imag = CONST_IMAG(A, k * lda + j);
112 temp_real += Aki_real * Akj_real - Aki_imag * Akj_imag;
113 temp_imag += Aki_real * Akj_imag + Aki_imag * Akj_real;
115 REAL(C, i * ldc + j) += alpha * temp_real;
116 IMAG(C, i * ldc + j) += alpha * temp_imag;
120 } else if (uplo == CblasLower && trans == CblasNoTrans) {
122 for (i = 0; i < N; i++) {
123 for (j = 0; j <= i; j++) {
124 BASE temp_real = 0.0;
125 BASE temp_imag = 0.0;
126 for (k = 0; k < K; k++) {
127 const BASE Aik_real = CONST_REAL(A, i * lda + k);
128 const BASE Aik_imag = CONST_IMAG(A, i * lda + k);
129 const BASE Ajk_real = CONST_REAL(A, j * lda + k);
130 const BASE Ajk_imag = -CONST_IMAG(A, j * lda + k);
131 temp_real += Aik_real * Ajk_real - Aik_imag * Ajk_imag;
132 temp_imag += Aik_real * Ajk_imag + Aik_imag * Ajk_real;
134 REAL(C, i * ldc + j) += alpha * temp_real;
135 IMAG(C, i * ldc + j) += alpha * temp_imag;
139 } else if (uplo == CblasLower && trans == CblasConjTrans) {
141 for (i = 0; i < N; i++) {
142 for (j = 0; j <= i; j++) {
143 BASE temp_real = 0.0;
144 BASE temp_imag = 0.0;
145 for (k = 0; k < K; k++) {
146 const BASE Aki_real = CONST_REAL(A, k * lda + i);
147 const BASE Aki_imag = -CONST_IMAG(A, k * lda + i);
148 const BASE Akj_real = CONST_REAL(A, k * lda + j);
149 const BASE Akj_imag = CONST_IMAG(A, k * lda + j);
150 temp_real += Aki_real * Akj_real - Aki_imag * Akj_imag;
151 temp_imag += Aki_real * Akj_imag + Aki_imag * Akj_real;
153 REAL(C, i * ldc + j) += alpha * temp_real;
154 IMAG(C, i * ldc + j) += alpha * temp_imag;
159 BLAS_ERROR("unrecognized operation");