Hi Charles, > Right now, if I want to take the negative of every element in a matrix I > end up doing the following: > > // previously assigned > viennacl::matrix<T> vcl_A; > > // matrix of zeros to subtract from > viennacl::matrix<T> vcl_Z = > viennacl::zero_matrix<T>(vcl_A.size1(),vcl_A.size2()); > > // subtract in-place > vcl_Z -= vcl_A; > vcl_A = vcl_Z; > > Is there a more efficient way to approach this? Allocating an > additional entire matrix is proving quite wasteful in some of my benchmarks.
What about just vcl_A = T(-1) * vcl_A; ? This is 'inplace' as requested :-) Best regards, Karli ------------------------------------------------------------------------------ _______________________________________________ ViennaCL-devel mailing list ViennaCL-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/viennacl-devel
