/**
* Make sure that the fp treats the denormalized floating
* point numbers as zero.
*
* This is the behavior required by D3D10. OpenGL doesn't care.
*/
unsigned
util_fpstate_set_denorms_to_zero(unsigned current_mxcsr)
{
#if defined(PIPE_ARCH_SSE)
if (util_cpu_caps.has_sse) {
/* Enable flush to zero mode */
current_mxcsr |= _MM_FLUSH_ZERO_MASK;
if (util_cpu_caps.has_daz) {
/* Enable denormals are zero mode */
current_mxcsr |= _MM_DENORMALS_ZERO_MASK;
}
util_fpstate_set(current_mxcsr);
}
#endif
return current_mxcsr;
}
/**
* Called by setup module when it has something for us to render.
*/
void
lp_rast_queue_scene( struct lp_rasterizer *rast,
struct lp_scene *scene)
{
LP_DBG(DEBUG_SETUP, "%s\n", __FUNCTION__);
if (rast->num_threads == 0) {
/* no threading */
unsigned fpstate = util_fpstate_get();
/* Make sure that denorms are treated like zeros. This is
* the behavior required by D3D10. OpenGL doesn't care.
*/
util_fpstate_set_denorms_to_zero(fpstate);
lp_rast_begin( rast, scene );
rasterize_scene( &rast->tasks[0], scene );
lp_rast_end( rast );
util_fpstate_set(fpstate);
rast->curr_scene = NULL;
}
else {
/* threaded rendering! */
unsigned i;
lp_scene_enqueue( rast->full_scenes, scene );
/* signal the threads that there's work to do */
for (i = 0; i < rast->num_threads; i++) {
pipe_semaphore_signal(&rast->tasks[i].work_ready);
}
}
LP_DBG(DEBUG_SETUP, "%s done \n", __FUNCTION__);
}
