Mercurial > octave
view liboctave/external/blas-xtra/zmatm3.f @ 26376:00f796120a6d stable
maint: Update copyright dates in all source files.
author | John W. Eaton <jwe@octave.org> |
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date | Wed, 02 Jan 2019 16:32:43 -0500 |
parents | 6652d3823428 |
children | b442ec6dda5c |
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c Copyright (C) 2009-2019 VZLU Prague, a.s., Czech Republic c c Author: Jaroslav Hajek <highegg@gmail.com> c c This file is part of Octave. c c Octave is free software: you can redistribute it and/or modify it c under the terms of the GNU General Public License as published by c the Free Software Foundation, either version 3 of the License, or c (at your option) any later version. c c Octave is distributed in the hope that it will be useful, but c WITHOUT ANY WARRANTY; without even the implied warranty of c MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the c GNU General Public License for more details. c c You should have received a copy of the GNU General Public License c along with Octave; see the file COPYING. If not, see c <https://www.gnu.org/licenses/>. c subroutine zmatm3(m,n,k,np,a,b,c) c purpose: a 3-dimensional matrix product. c given a (m,k,np) array a and (k,n,np) array b, c calculates a (m,n,np) array c such that c for i = 1:np c c(:,:,i) = a(:,:,i) * b(:,:,i) c c arguments: c m,n,k (in) the dimensions c np (in) number of multiplications c a (in) a double complex input array, size (m,k,np) c b (in) a double complex input array, size (k,n,np) c c (out) a double complex output array, size (m,n,np) integer m,n,k,np double complex a(m*k,np),b(k*n,np) double complex c(m*n,np) double complex zdotu,one,zero parameter (one = 1d0, zero = 0d0) external zdotu,zgemv,zgemm integer i c quick return if possible. if (np <= 0) return if (m == 1) then if (n == 1) then do i = 1,np c(1,i) = zdotu(k,a(1,i),1,b(1,i),1) end do else do i = 1,np call zgemv("T",k,n,one,b(1,i),k,a(1,i),1,zero,c(1,i),1) end do end if else if (n == 1) then do i = 1,np call zgemv("N",m,k,one,a(1,i),m,b(1,i),1,zero,c(1,i),1) end do else do i = 1,np call zgemm("N","N",m,n,k, + one,a(1,i),m,b(1,i),k,zero,c(1,i),m) end do end if end if end subroutine