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libagx: generalize vertex_id_for_topology

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so we can use it in separable GS

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/27616>
This commit is contained in:
Alyssa Rosenzweig
2024-01-29 16:17:45 -04:00
committed by Marge Bot
parent c9f55166dc
commit e1783fc083
2 changed files with 9 additions and 4 deletions
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src/asahi/lib/agx_nir_lower_gs.h
+4
View File
@@ -26,6 +26,10 @@ struct agx_lower_output_to_var_state {
bool agx_lower_output_to_var(struct nir_builder *b, struct nir_instr *instr,
void *data);
struct nir_def *agx_vertex_id_for_topology(struct nir_builder *b,
struct nir_def *vert,
struct agx_ia_key *key);
bool agx_nir_lower_ia(struct nir_shader *s, struct agx_ia_key *ia);
bool agx_nir_lower_gs(struct nir_shader *gs, struct nir_shader *vs,
src/asahi/lib/agx_nir_lower_ia.c
+5 -4
View File
@@ -24,11 +24,11 @@
* Sync with geometry.cl, this is preferred to avoid NIR needing to chew through
* the massive switch statement (bad for compile time).
*/
static nir_def *
vertex_id_for_topology(nir_builder *b, struct agx_ia_key *key)
nir_def *
agx_vertex_id_for_topology(nir_builder *b, nir_def *vert,
struct agx_ia_key *key)
{
nir_def *prim = nir_load_primitive_id(b);
nir_def *vert = nir_load_vertex_id_in_primitive_agx(b);
nir_def *flatshade_first = nir_imm_bool(b, key->flatshade_first);
switch (key->mode) {
@@ -73,7 +73,8 @@ vertex_id_for_topology(nir_builder *b, struct agx_ia_key *key)
static nir_def *
load_vertex_id(nir_builder *b, struct agx_ia_key *key)
{
nir_def *id = vertex_id_for_topology(b, key);
nir_def *vert = nir_load_vertex_id_in_primitive_agx(b);
nir_def *id = agx_vertex_id_for_topology(b, vert, key);
/* If drawing with an index buffer, pull the vertex ID. Otherwise, the
* vertex ID is just the index as-is.