/* 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;
CHECK_ARGS14(GEMM,Order,TransA,TransB,M,N,K,alpha,A,lda,B,ldb,beta,C,ldc);
{
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");
}
}
}