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i965: Respect the no_8 flag on Gen6, not just Gen7+.

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When doing repclears, we only want to use the SIMD16 program, not the
SIMD8 one.  Kristian added this to the Gen7+ code, but apparently we
missed it in the Gen6 code.  This patch copies that code over.

Approximately doubles the performance in a clear microbenchmark from
mesa-demos (clearspd -width 500 -height 500 +color) on Sandybridge.

Cc: "10.4 10.3" <mesa-stable@lists.freedesktop.org>
Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Kristian Høgsberg <krh@bitplanet.net>
Reviewed-by: Matt Turner <mattst88@gmail.com>
References: https://code.google.com/p/chrome-os-partner/issues/detail?id=34681
This commit is contained in:
Kenneth Graunke
2015-01-09 20:46:17 -08:00
parent f591712efe
commit f95733ddb7
1 changed files with 2 additions and 2 deletions
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4
src/mesa/drivers/dri/i965/gen6_wm_state.c
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@@ -135,10 +135,10 @@ upload_wm_state(struct brw_context *brw)
_mesa_get_min_invocations_per_fragment(ctx, brw->fragment_program, false);
assert(min_inv_per_frag >= 1);
if (prog_data->prog_offset_16) {
if (prog_data->prog_offset_16 || prog_data->no_8) {
dw5 |= GEN6_WM_16_DISPATCH_ENABLE;
if (min_inv_per_frag == 1) {
if (!prog_data->no_8 && min_inv_per_frag == 1) {
dw5 |= GEN6_WM_8_DISPATCH_ENABLE;
dw4 |= (prog_data->base.dispatch_grf_start_reg <<
GEN6_WM_DISPATCH_START_GRF_SHIFT_0);