On Wed, Oct 22, 2014 at 10:30 PM, Matt Turner <matts...@gmail.com> wrote: > On Wed, Oct 22, 2014 at 9:02 PM, Timothy Arceri <t_arc...@yahoo.com.au> wrote: >> I almost wasn't going to bother sending this out since it uses SSE4.1 >> and its recommended to use glDrawRangeElements anyway. But since these games >> are still ofter used for benchmarking I thought I'd see if anyone is >> interested in this. I only optimised GL_UNSIGNED_INT as that was the >> only place these games were hitting but I guess it wouldn't hurt >> to optimse the other cases too. > > I think it's kind of neat! > > It might also be fun to try to do this with OpenMP. OpenMP 3.1 > (supported since gcc-4.7) supports min/max reduction operators.
I think all you'd need to do for that is to add this pragma immediately before the for loop in vbo_exec_array.c: #if _OPENMP > ... (have to figure out the date for OMP 3.1) #pragma omp simd reduction(max:max_ui) reduction(min:min_ui). #endif and then change the inner loop to use ternary for min/max: max_ui = ui_indices[i] > max_ui ? ui_indices[i] : max_ui; min_ui = ui_indices[i] < min_ui ? ui_indices[i] : min_ui; I tested it with a little function and confirmed that it generates SSE4.1/AVX2 instructions (and even a bunch of SSE2 instructions when 4.1 isn't available!) depending on the -march= value I pass. _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/mesa-dev
