Mesa (master): i965: Move some /* CACHE_NEW_SAMPLER */ comments.

[Kenneth Graunke]

Module: Mesa
Branch: master
Commit: 324368b500fc83fc8aa801ac2ab4db4427ebece1
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=324368b500fc83fc8aa801ac2ab4db4427ebece1

Author: Kenneth Graunke <kenneth at whitecape.org>
Date:   Mon Nov 24 22:20:29 2014 -0800

i965: Move some /* CACHE_NEW_SAMPLER */ comments.

Marking brw_stage_state::sampler_count as CACHE_NEW_SAMPLER is wrong.

The number of samplers used by each program is actually computed at
draw time (brw_try_draw_prims), based purely on the currently bound
shader programs (gl_program::SamplersUsed).

CACHE_NEW_SAMPLER means that we've emitted a new SAMPLER_STATE table.
Although this could indicate that the number of samplers has changed,
it could also simply mean that the contents of the table has changed
(i.e. we've bound different textures).

The real reason these atoms depend on CACHE_NEW_SAMPLER is because they
include a pointer to the SAMPLER_STATE table.  This was not commented.

So, move the comments to the appropriate place.

Signed-off-by: Kenneth Graunke <kenneth at whitecape.org>
Reviewed-by: Kristian Høgsberg <krh at bitplanet.net>
Reviewed-by: Matt Turner <mattst88 at gmail.com>

---

 src/mesa/drivers/dri/i965/brw_vs_state.c |    2 +-
 src/mesa/drivers/dri/i965/brw_wm_state.c |    3 +--
 2 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/src/mesa/drivers/dri/i965/brw_vs_state.c b/src/mesa/drivers/dri/i965/brw_vs_state.c
index cd740db..351f7ef 100644
--- a/src/mesa/drivers/dri/i965/brw_vs_state.c
+++ b/src/mesa/drivers/dri/i965/brw_vs_state.c
@@ -145,7 +145,6 @@ brw_upload_vs_unit(struct brw_context *brw)
    if (brw->gen == 5)
       vs->vs5.sampler_count = 0; /* hardware requirement */
    else {
-      /* CACHE_NEW_SAMPLER */
       vs->vs5.sampler_count = (stage_state->sampler_count + 3) / 4;
    }
 
@@ -160,6 +159,7 @@ brw_upload_vs_unit(struct brw_context *brw)
    /* Set the sampler state pointer, and its reloc
     */
    if (stage_state->sampler_count) {
+      /* CACHE_NEW_SAMPLER - reloc */
       vs->vs5.sampler_state_pointer =
          (brw->batch.bo->offset64 + stage_state->sampler_offset) >> 5;
       drm_intel_bo_emit_reloc(brw->batch.bo,
diff --git a/src/mesa/drivers/dri/i965/brw_wm_state.c b/src/mesa/drivers/dri/i965/brw_wm_state.c
index 6a53a98..2f315c6 100644
--- a/src/mesa/drivers/dri/i965/brw_wm_state.c
+++ b/src/mesa/drivers/dri/i965/brw_wm_state.c
@@ -150,12 +150,11 @@ brw_upload_wm_unit(struct brw_context *brw)
    if (brw->gen == 5)
       wm->wm4.sampler_count = 0; /* hardware requirement */
    else {
-      /* CACHE_NEW_SAMPLER */
       wm->wm4.sampler_count = (brw->wm.base.sampler_count + 1) / 4;
    }
 
    if (brw->wm.base.sampler_count) {
-      /* reloc */
+      /* CACHE_NEW_SAMPLER - reloc */
       wm->wm4.sampler_state_pointer = (brw->batch.bo->offset64 +
 				       brw->wm.base.sampler_offset) >> 5;
    } else {