Is sparse matrix-vector multiplication available in Simulink/xPC?

I am trying to make my control algorithm more efficient since my matrices are sparse. Currently, I am doing conventional matrix-vector multiplications in Simulink/xPC for a real-time application. I can not find a way to convert the matrix to a 开发者_Go百科sparse one and perform that type of multiplication where it is compatible with xPC. Does anyone have an idea on how to do this?

It appears, at least as of earlier this year, that it is impossible to do sparse matrices in Simulink: see this Q&A on MathWorks' site. As the answerer is a Simulink software engineer, it seems authoritative. :)