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i965: Optimize VUE map comparisons.

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The entire VUE map is computed based on the slots_valid bitfield;
calling brw_compute_vue_map on the same bitfield will return the
same result.  So we can simply compare those.

struct brw_vue_map is 136 bytes; doing a single 8-byte comparison is
much cheaper and should work just as well.

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Chris Forbes <chrisf@ijw.co.nz>
This commit is contained in:
Kenneth Graunke 2015-05-15 10:08:19 -07:00
parent 6e03377daf
commit 0e23c246c0
2 changed files with 4 additions and 4 deletions
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4
src/mesa/drivers/dri/i965/brw_gs.c
View file

@ -356,8 +356,8 @@ brw_upload_gs_prog(struct brw_context *brw)
}
brw->gs.base.prog_data = &brw->gs.prog_data->base.base;
if (memcmp(&brw->gs.prog_data->base.vue_map, &brw->vue_map_geom_out,
sizeof(brw->vue_map_geom_out)) != 0) {
if (brw->gs.prog_data->base.vue_map.slots_valid !=
brw->vue_map_geom_out.slots_valid) {
brw->vue_map_geom_out = brw->gs.prog_data->base.vue_map;
brw->ctx.NewDriverState |= BRW_NEW_VUE_MAP_GEOM_OUT;
}

4
src/mesa/drivers/dri/i965/brw_vs.c
View file

@ -368,8 +368,8 @@ brw_upload_vs_prog(struct brw_context *brw)
}
brw->vs.base.prog_data = &brw->vs.prog_data->base.base;
if (memcmp(&brw->vs.prog_data->base.vue_map, &brw->vue_map_geom_out,
sizeof(brw->vue_map_geom_out)) != 0) {
if (brw->vs.prog_data->base.vue_map.slots_valid !=
brw->vue_map_geom_out.slots_valid) {
brw->vue_map_vs = brw->vs.prog_data->base.vue_map;
brw->ctx.NewDriverState |= BRW_NEW_VUE_MAP_VS;
if (brw->gen < 6) {