diff options
Diffstat (limited to 'gsl-1.9/cblas/source_gemm_c.h')
| -rw-r--r-- | gsl-1.9/cblas/source_gemm_c.h | 167 |
1 files changed, 167 insertions, 0 deletions
diff --git a/gsl-1.9/cblas/source_gemm_c.h b/gsl-1.9/cblas/source_gemm_c.h new file mode 100644 index 0000000..ca0a4fb --- /dev/null +++ b/gsl-1.9/cblas/source_gemm_c.h @@ -0,0 +1,167 @@ +/* blas/source_gemm_c.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; + 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"); + } +} |