diff options
Diffstat (limited to 'gsl-1.9/cblas/source_gemv_c.h')
| -rw-r--r-- | gsl-1.9/cblas/source_gemv_c.h | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/gsl-1.9/cblas/source_gemv_c.h b/gsl-1.9/cblas/source_gemv_c.h new file mode 100644 index 0000000..9e998c9 --- /dev/null +++ b/gsl-1.9/cblas/source_gemv_c.h @@ -0,0 +1,158 @@ +/* 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 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; + 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"); + } + +} |