123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159 |
- /* blas/source_gemv_c.h
- *
- * Copyright (C) 1996, 1997, 1998, 1999, 2000 Gerard Jungman
- *
- * 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;
- INDEX lenX, lenY;
- 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 (M == 0 || N == 0)
- return;
- if ((alpha_real == 0.0 && alpha_imag == 0.0)
- && (beta_real == 1.0 && beta_imag == 0.0))
- return;
- if (TransA == CblasNoTrans) {
- lenX = N;
- lenY = M;
- } else {
- lenX = M;
- lenY = N;
- }
- /* form y := beta*y */
- if (beta_real == 0.0 && beta_imag == 0.0) {
- INDEX iy = OFFSET(lenY, incY);
- for (i = 0; i < lenY; i++) {
- REAL(Y, iy) = 0.0;
- IMAG(Y, iy) = 0.0;
- iy += incY;
- }
- } else if (!(beta_real == 1.0 && beta_imag == 0.0)) {
- INDEX iy = OFFSET(lenY, incY);
- for (i = 0; i < lenY; i++) {
- const BASE y_real = REAL(Y, iy);
- const BASE y_imag = IMAG(Y, iy);
- const BASE tmpR = y_real * beta_real - y_imag * beta_imag;
- const BASE tmpI = y_real * beta_imag + y_imag * beta_real;
- REAL(Y, iy) = tmpR;
- IMAG(Y, iy) = tmpI;
- iy += incY;
- }
- }
- if (alpha_real == 0.0 && alpha_imag == 0.0)
- return;
- if ((order == CblasRowMajor && TransA == CblasNoTrans)
- || (order == CblasColMajor && TransA == CblasTrans)) {
- /* form y := alpha*A*x + y */
- INDEX iy = OFFSET(lenY, incY);
- for (i = 0; i < lenY; i++) {
- BASE dotR = 0.0;
- BASE dotI = 0.0;
- INDEX ix = OFFSET(lenX, incX);
- for (j = 0; j < lenX; j++) {
- const BASE x_real = CONST_REAL(X, ix);
- const BASE x_imag = CONST_IMAG(X, ix);
- const BASE A_real = CONST_REAL(A, lda * i + j);
- const BASE A_imag = CONST_IMAG(A, lda * i + j);
- dotR += A_real * x_real - A_imag * x_imag;
- dotI += A_real * x_imag + A_imag * x_real;
- ix += incX;
- }
- REAL(Y, iy) += alpha_real * dotR - alpha_imag * dotI;
- IMAG(Y, iy) += alpha_real * dotI + alpha_imag * dotR;
- iy += incY;
- }
- } else if ((order == CblasRowMajor && TransA == CblasTrans)
- || (order == CblasColMajor && TransA == CblasNoTrans)) {
- /* form y := alpha*A'*x + y */
- INDEX ix = OFFSET(lenX, incX);
- for (j = 0; j < lenX; j++) {
- BASE x_real = CONST_REAL(X, ix);
- BASE x_imag = CONST_IMAG(X, ix);
- BASE tmpR = alpha_real * x_real - alpha_imag * x_imag;
- BASE tmpI = alpha_real * x_imag + alpha_imag * x_real;
- INDEX iy = OFFSET(lenY, incY);
- for (i = 0; i < lenY; i++) {
- const BASE A_real = CONST_REAL(A, lda * j + i);
- const BASE A_imag = CONST_IMAG(A, lda * j + i);
- REAL(Y, iy) += A_real * tmpR - A_imag * tmpI;
- IMAG(Y, iy) += A_real * tmpI + A_imag * tmpR;
- iy += incY;
- }
- ix += incX;
- }
- } else if (order == CblasRowMajor && TransA == CblasConjTrans) {
- /* form y := alpha*A^H*x + y */
- INDEX ix = OFFSET(lenX, incX);
- for (j = 0; j < lenX; j++) {
- BASE x_real = CONST_REAL(X, ix);
- BASE x_imag = CONST_IMAG(X, ix);
- BASE tmpR = alpha_real * x_real - alpha_imag * x_imag;
- BASE tmpI = alpha_real * x_imag + alpha_imag * x_real;
- INDEX iy = OFFSET(lenY, incY);
- for (i = 0; i < lenY; i++) {
- const BASE A_real = CONST_REAL(A, lda * j + i);
- const BASE A_imag = CONST_IMAG(A, lda * j + i);
- REAL(Y, iy) += A_real * tmpR - (-A_imag) * tmpI;
- IMAG(Y, iy) += A_real * tmpI + (-A_imag) * tmpR;
- iy += incY;
- }
- ix += incX;
- }
- } else if (order == CblasColMajor && TransA == CblasConjTrans) {
- /* form y := alpha*A^H*x + y */
- INDEX iy = OFFSET(lenY, incY);
- for (i = 0; i < lenY; i++) {
- BASE dotR = 0.0;
- BASE dotI = 0.0;
- INDEX ix = OFFSET(lenX, incX);
- for (j = 0; j < lenX; j++) {
- const BASE x_real = CONST_REAL(X, ix);
- const BASE x_imag = CONST_IMAG(X, ix);
- const BASE A_real = CONST_REAL(A, lda * i + j);
- const BASE A_imag = CONST_IMAG(A, lda * i + j);
- dotR += A_real * x_real - (-A_imag) * x_imag;
- dotI += A_real * x_imag + (-A_imag) * x_real;
- ix += incX;
- }
- REAL(Y, iy) += alpha_real * dotR - alpha_imag * dotI;
- IMAG(Y, iy) += alpha_real * dotI + alpha_imag * dotR;
- iy += incY;
- }
- } else {
- BLAS_ERROR("unrecognized operation");
- }
- }
|