There is an implementation of deferred shading only in the cpu ?

I like to add ligth and shadows to a cpu voxel render.

I not found a cpu only implementation for reference .

thank's in advance

There is an implementation of deferred shading only in the cpu ?

It is probably not a very good idea to begin with. The idea of deferred rendering is to compute shading for the entire image. On a GPU that's probably nothing.

On a CPU... You'll probably be better off with forward rendering at higher resolutions. It's the collective area of pixels vs the area of pixels of the entire screen.