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- /* blas/source_gemm_c.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;
- INDEX n1, n2;
- INDEX ldf, ldg;
- int conjF, conjG, TransF, TransG;
- const BASE *F, *G;
- 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) {
- n1 = M;
- n2 = N;
- F = (const BASE *)A;
- ldf = lda;
- conjF = (TransA == CblasConjTrans) ? -1 : 1;
- TransF = (TransA == CblasNoTrans) ? CblasNoTrans : CblasTrans;
- G = (const BASE *)B;
- ldg = ldb;
- conjG = (TransB == CblasConjTrans) ? -1 : 1;
- TransG = (TransB == CblasNoTrans) ? CblasNoTrans : CblasTrans;
- } else {
- n1 = N;
- n2 = M;
- F = (const BASE *)B;
- ldf = ldb;
- conjF = (TransB == CblasConjTrans) ? -1 : 1;
- TransF = (TransB == CblasNoTrans) ? CblasNoTrans : CblasTrans;
- G = (const BASE *)A;
- ldg = lda;
- conjG = (TransA == CblasConjTrans) ? -1 : 1;
- TransG = (TransA == CblasNoTrans) ? CblasNoTrans : CblasTrans;
- }
- /* form y := beta*y */
- if (beta_real == 0.0 && beta_imag == 0.0) {
- for (i = 0; i < n1; i++) {
- for (j = 0; j < n2; 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)) {
- for (i = 0; i < n1; i++) {
- for (j = 0; j < n2; 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 (TransF == CblasNoTrans && TransG == CblasNoTrans) {
- /* form C := alpha*A*B + C */
- for (k = 0; k < K; k++) {
- for (i = 0; i < n1; i++) {
- const BASE Fik_real = CONST_REAL(F, ldf * i + k);
- const BASE Fik_imag = conjF * CONST_IMAG(F, ldf * i + k);
- const BASE temp_real = alpha_real * Fik_real - alpha_imag * Fik_imag;
- const BASE temp_imag = alpha_real * Fik_imag + alpha_imag * Fik_real;
- if (!(temp_real == 0.0 && temp_imag == 0.0)) {
- for (j = 0; j < n2; j++) {
- const BASE Gkj_real = CONST_REAL(G, ldg * k + j);
- const BASE Gkj_imag = conjG * CONST_IMAG(G, ldg * k + j);
- REAL(C, ldc * i + j) += temp_real * Gkj_real - temp_imag * Gkj_imag;
- IMAG(C, ldc * i + j) += temp_real * Gkj_imag + temp_imag * Gkj_real;
- }
- }
- }
- }
- } else if (TransF == CblasNoTrans && TransG == CblasTrans) {
- /* form C := alpha*A*B' + C */
- for (i = 0; i < n1; i++) {
- for (j = 0; j < n2; j++) {
- BASE temp_real = 0.0;
- BASE temp_imag = 0.0;
- for (k = 0; k < K; k++) {
- const BASE Fik_real = CONST_REAL(F, ldf * i + k);
- const BASE Fik_imag = conjF * CONST_IMAG(F, ldf * i + k);
- const BASE Gjk_real = CONST_REAL(G, ldg * j + k);
- const BASE Gjk_imag = conjG * CONST_IMAG(G, ldg * j + k);
- temp_real += Fik_real * Gjk_real - Fik_imag * Gjk_imag;
- temp_imag += Fik_real * Gjk_imag + Fik_imag * Gjk_real;
- }
- REAL(C, ldc * i + j) += alpha_real * temp_real - alpha_imag * temp_imag;
- IMAG(C, ldc * i + j) += alpha_real * temp_imag + alpha_imag * temp_real;
- }
- }
- } else if (TransF == CblasTrans && TransG == CblasNoTrans) {
- for (k = 0; k < K; k++) {
- for (i = 0; i < n1; i++) {
- const BASE Fki_real = CONST_REAL(F, ldf * k + i);
- const BASE Fki_imag = conjF * CONST_IMAG(F, ldf * k + i);
- const BASE temp_real = alpha_real * Fki_real - alpha_imag * Fki_imag;
- const BASE temp_imag = alpha_real * Fki_imag + alpha_imag * Fki_real;
- if (!(temp_real == 0.0 && temp_imag == 0.0)) {
- for (j = 0; j < n2; j++) {
- const BASE Gkj_real = CONST_REAL(G, ldg * k + j);
- const BASE Gkj_imag = conjG * CONST_IMAG(G, ldg * k + j);
- REAL(C, ldc * i + j) += temp_real * Gkj_real - temp_imag * Gkj_imag;
- IMAG(C, ldc * i + j) += temp_real * Gkj_imag + temp_imag * Gkj_real;
- }
- }
- }
- }
- } else if (TransF == CblasTrans && TransG == CblasTrans) {
- for (i = 0; i < n1; i++) {
- for (j = 0; j < n2; j++) {
- BASE temp_real = 0.0;
- BASE temp_imag = 0.0;
- for (k = 0; k < K; k++) {
- const BASE Fki_real = CONST_REAL(F, ldf * k + i);
- const BASE Fki_imag = conjF * CONST_IMAG(F, ldf * k + i);
- const BASE Gjk_real = CONST_REAL(G, ldg * j + k);
- const BASE Gjk_imag = conjG * CONST_IMAG(G, ldg * j + k);
- temp_real += Fki_real * Gjk_real - Fki_imag * Gjk_imag;
- temp_imag += Fki_real * Gjk_imag + Fki_imag * Gjk_real;
- }
- REAL(C, ldc * i + j) += alpha_real * temp_real - alpha_imag * temp_imag;
- IMAG(C, ldc * i + j) += alpha_real * temp_imag + alpha_imag * temp_real;
- }
- }
- } else {
- BLAS_ERROR("unrecognized operation");
- }
- }
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