The idea is taken from radeonsi. The code lacks some checks for null vs,
and I'm unsure about some changes against that, so I left it in place.
Some statistics for GTAⅣ:
Average tesselation bind skip per frame: ≈350
Average geometric shaders bind skip per frame: ≈260
Skip of binding vertex ones occurs rarely enough to not get into per-frame
counter at all, so I just gonna say: it happens.
v2: I've occasionally removed an empty line, don't do this.
v3: return a check for null tes and gs back, while I haven't figured out
the way to move stride assignment to r600_update_derived_state() (as it
is in radeonsi).
Signed-off-by: Constantine Kharlamov <hi-an...@yandex.ru>
---
src/gallium/drivers/r600/r600_state_common.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/src/gallium/drivers/r600/r600_state_common.c
b/src/gallium/drivers/r600/r600_state_common.c
index 4de2a7344b..922030a1ed 100644
--- a/src/gallium/drivers/r600/r600_state_common.c
+++ b/src/gallium/drivers/r600/r600_state_common.c
@@ -931,7 +931,7 @@ static void r600_bind_vs_state(struct pipe_context *ctx,
void *state)
{
struct r600_context *rctx = (struct r600_context *)ctx;
- if (!state)
+ if (!state || rctx->vs_shader == state)
return;
rctx->vs_shader = (struct r600_pipe_shader_selector *)state;
@@ -943,6 +943,9 @@ static void r600_bind_gs_state(struct pipe_context *ctx,
void *state)
{
struct r600_context *rctx = (struct r600_context *)ctx;
+ if (state == rctx->gs_shader)
+ return;
+
rctx->gs_shader = (struct r600_pipe_shader_selector *)state;
r600_update_vs_writes_viewport_index(&rctx->b, r600_get_vs_info(rctx));
@@ -962,6 +965,9 @@ static void r600_bind_tes_state(struct pipe_context *ctx,
void *state)
{
struct r600_context *rctx = (struct r600_context *)ctx;
+ if (state == rctx->tes_shader)
+ return;
+
rctx->tes_shader = (struct r600_pipe_shader_selector *)state;
r600_update_vs_writes_viewport_index(&rctx->b, r600_get_vs_info(rctx));
--
2.12.2
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