1 /* blas/source_syr2k_c.h
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 const BASE alpha_real = CONST_REAL0(alpha);
25 const BASE alpha_imag = CONST_IMAG0(alpha);
26 const BASE beta_real = CONST_REAL0(beta);
27 const BASE beta_imag = CONST_IMAG0(beta);
29 if ((alpha_real == 0.0 && alpha_imag == 0.0)
30 && (beta_real == 1.0 && beta_imag == 0.0))
33 if (Order == CblasRowMajor) {
37 uplo = (Uplo == CblasUpper) ? CblasLower : CblasUpper;
38 trans = (Trans == CblasNoTrans) ? CblasTrans : CblasNoTrans;
41 /* form C := beta*C */
43 if (beta_real == 0.0 && beta_imag == 0.0) {
44 if (uplo == CblasUpper) {
45 for (i = 0; i < N; i++) {
46 for (j = i; j < N; j++) {
47 REAL(C, ldc * i + j) = 0.0;
48 IMAG(C, ldc * i + j) = 0.0;
52 for (i = 0; i < N; i++) {
53 for (j = 0; j <= i; j++) {
54 REAL(C, ldc * i + j) = 0.0;
55 IMAG(C, ldc * i + j) = 0.0;
59 } else if (!(beta_real == 1.0 && beta_imag == 0.0)) {
60 if (uplo == CblasUpper) {
61 for (i = 0; i < N; i++) {
62 for (j = i; j < N; j++) {
63 const BASE Cij_real = REAL(C, ldc * i + j);
64 const BASE Cij_imag = IMAG(C, ldc * i + j);
65 REAL(C, ldc * i + j) = beta_real * Cij_real - beta_imag * Cij_imag;
66 IMAG(C, ldc * i + j) = beta_real * Cij_imag + beta_imag * Cij_real;
70 for (i = 0; i < N; i++) {
71 for (j = 0; j <= i; j++) {
72 const BASE Cij_real = REAL(C, ldc * i + j);
73 const BASE Cij_imag = IMAG(C, ldc * i + j);
74 REAL(C, ldc * i + j) = beta_real * Cij_real - beta_imag * Cij_imag;
75 IMAG(C, ldc * i + j) = beta_real * Cij_imag + beta_imag * Cij_real;
82 if (alpha_real == 0.0 && alpha_imag == 0.0)
85 if (uplo == CblasUpper && trans == CblasNoTrans) {
87 for (i = 0; i < N; i++) {
88 for (j = i; j < N; j++) {
91 for (k = 0; k < K; k++) {
92 const BASE Aik_real = CONST_REAL(A, i * lda + k);
93 const BASE Aik_imag = CONST_IMAG(A, i * lda + k);
94 const BASE Bik_real = CONST_REAL(B, i * ldb + k);
95 const BASE Bik_imag = CONST_IMAG(B, i * ldb + k);
96 const BASE Ajk_real = CONST_REAL(A, j * lda + k);
97 const BASE Ajk_imag = CONST_IMAG(A, j * lda + k);
98 const BASE Bjk_real = CONST_REAL(B, j * ldb + k);
99 const BASE Bjk_imag = CONST_IMAG(B, j * ldb + k);
100 temp_real += ((Aik_real * Bjk_real - Aik_imag * Bjk_imag)
101 + (Bik_real * Ajk_real - Bik_imag * Ajk_imag));
102 temp_imag += ((Aik_real * Bjk_imag + Aik_imag * Bjk_real)
103 + (Bik_real * Ajk_imag + Bik_imag * Ajk_real));
105 REAL(C, i * ldc + j) += alpha_real * temp_real - alpha_imag * temp_imag;
106 IMAG(C, i * ldc + j) += alpha_real * temp_imag + alpha_imag * temp_real;
110 } else if (uplo == CblasUpper && trans == CblasTrans) {
112 for (k = 0; k < K; k++) {
113 for (i = 0; i < N; i++) {
114 BASE Aki_real = CONST_REAL(A, k * lda + i);
115 BASE Aki_imag = CONST_IMAG(A, k * lda + i);
116 BASE Bki_real = CONST_REAL(B, k * ldb + i);
117 BASE Bki_imag = CONST_IMAG(B, k * ldb + i);
118 BASE temp1_real = alpha_real * Aki_real - alpha_imag * Aki_imag;
119 BASE temp1_imag = alpha_real * Aki_imag + alpha_imag * Aki_real;
120 BASE temp2_real = alpha_real * Bki_real - alpha_imag * Bki_imag;
121 BASE temp2_imag = alpha_real * Bki_imag + alpha_imag * Bki_real;
122 for (j = i; j < N; j++) {
123 BASE Akj_real = CONST_REAL(A, k * lda + j);
124 BASE Akj_imag = CONST_IMAG(A, k * lda + j);
125 BASE Bkj_real = CONST_REAL(B, k * ldb + j);
126 BASE Bkj_imag = CONST_IMAG(B, k * ldb + j);
127 REAL(C, i * lda + j) += (temp1_real * Bkj_real - temp1_imag * Bkj_imag)
128 + (temp2_real * Akj_real - temp2_imag * Akj_imag);
129 IMAG(C, i * lda + j) += (temp1_real * Bkj_imag + temp1_imag * Bkj_real)
130 + (temp2_real * Akj_imag + temp2_imag * Akj_real);
135 } else if (uplo == CblasLower && trans == CblasNoTrans) {
138 for (i = 0; i < N; i++) {
139 for (j = 0; j <= i; j++) {
140 BASE temp_real = 0.0;
141 BASE temp_imag = 0.0;
142 for (k = 0; k < K; k++) {
143 const BASE Aik_real = CONST_REAL(A, i * lda + k);
144 const BASE Aik_imag = CONST_IMAG(A, i * lda + k);
145 const BASE Bik_real = CONST_REAL(B, i * ldb + k);
146 const BASE Bik_imag = CONST_IMAG(B, i * ldb + k);
147 const BASE Ajk_real = CONST_REAL(A, j * lda + k);
148 const BASE Ajk_imag = CONST_IMAG(A, j * lda + k);
149 const BASE Bjk_real = CONST_REAL(B, j * ldb + k);
150 const BASE Bjk_imag = CONST_IMAG(B, j * ldb + k);
151 temp_real += ((Aik_real * Bjk_real - Aik_imag * Bjk_imag)
152 + (Bik_real * Ajk_real - Bik_imag * Ajk_imag));
153 temp_imag += ((Aik_real * Bjk_imag + Aik_imag * Bjk_real)
154 + (Bik_real * Ajk_imag + Bik_imag * Ajk_real));
156 REAL(C, i * ldc + j) += alpha_real * temp_real - alpha_imag * temp_imag;
157 IMAG(C, i * ldc + j) += alpha_real * temp_imag + alpha_imag * temp_real;
161 } else if (uplo == CblasLower && trans == CblasTrans) {
163 for (k = 0; k < K; k++) {
164 for (i = 0; i < N; i++) {
165 BASE Aki_real = CONST_REAL(A, k * lda + i);
166 BASE Aki_imag = CONST_IMAG(A, k * lda + i);
167 BASE Bki_real = CONST_REAL(B, k * ldb + i);
168 BASE Bki_imag = CONST_IMAG(B, k * ldb + i);
169 BASE temp1_real = alpha_real * Aki_real - alpha_imag * Aki_imag;
170 BASE temp1_imag = alpha_real * Aki_imag + alpha_imag * Aki_real;
171 BASE temp2_real = alpha_real * Bki_real - alpha_imag * Bki_imag;
172 BASE temp2_imag = alpha_real * Bki_imag + alpha_imag * Bki_real;
173 for (j = 0; j <= i; j++) {
174 BASE Akj_real = CONST_REAL(A, k * lda + j);
175 BASE Akj_imag = CONST_IMAG(A, k * lda + j);
176 BASE Bkj_real = CONST_REAL(B, k * ldb + j);
177 BASE Bkj_imag = CONST_IMAG(B, k * ldb + j);
178 REAL(C, i * lda + j) += (temp1_real * Bkj_real - temp1_imag * Bkj_imag)
179 + (temp2_real * Akj_real - temp2_imag * Akj_imag);
180 IMAG(C, i * lda + j) += (temp1_real * Bkj_imag + temp1_imag * Bkj_real)
181 + (temp2_real * Akj_imag + temp2_imag * Akj_real);
188 BLAS_ERROR("unrecognized operation");