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ac/nir/ngg: Carve out ngg_gs_process_out_primitive.

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This is the part of the code that processes things related to
a single primitive, mainly the primitive export argument.

Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/33218>
This commit is contained in:
Timur Kristóf 2025-01-27 14:02:50 +01:00 • committed by Marge Bot
parent 04b4c5d785
commit 4f8ee9b045
1 changed files with 17 additions and 8 deletions
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25
src/amd/common/nir/ac_nir_lower_ngg.c
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@ -2288,13 +2288,11 @@ lower_ngg_gs_intrinsics(nir_shader *shader, lower_ngg_gs_state *s)
nir_shader_intrinsics_pass(shader, lower_ngg_gs_intrinsic, nir_metadata_none, s);
}
static void
ngg_gs_export_primitives(nir_builder *b, nir_def *max_num_out_prims, nir_def *tid_in_tg,
nir_def *exporter_tid_in_tg, nir_def *primflag_0,
lower_ngg_gs_state *s)
static nir_def *
ngg_gs_process_out_primitive(nir_builder *b,
nir_def *exporter_tid_in_tg, nir_def *primflag_0,
lower_ngg_gs_state *s)
{
nir_if *if_prim_export_thread = nir_push_if(b, nir_ilt(b, tid_in_tg, max_num_out_prims));
/* Only bit 0 matters here - set it to 1 when the primitive should be null */
nir_def *is_null_prim = nir_ixor(b, primflag_0, nir_imm_int(b, -1u));
@ -2324,9 +2322,20 @@ ngg_gs_export_primitives(nir_builder *b, nir_def *max_num_out_prims, nir_def *ti
nir_isub(b, vtx_indices[2], is_odd), vtx_indices[2]);
}
nir_def *arg = ac_nir_pack_ngg_prim_exp_arg(b, s->num_vertices_per_primitive, vtx_indices,
return ac_nir_pack_ngg_prim_exp_arg(b, s->num_vertices_per_primitive, vtx_indices,
is_null_prim, s->options->hw_info->gfx_level);
ac_nir_export_primitive(b, arg, NULL);
}
static void
ngg_gs_export_primitives(nir_builder *b, nir_def *max_num_out_prims, nir_def *tid_in_tg,
nir_def *exporter_tid_in_tg, nir_def *primflag_0,
lower_ngg_gs_state *s)
{
nir_if *if_prim_export_thread = nir_push_if(b, nir_ilt(b, tid_in_tg, max_num_out_prims));
{
nir_def *arg = ngg_gs_process_out_primitive(b, exporter_tid_in_tg, primflag_0, s);
ac_nir_export_primitive(b, arg, NULL);
}
nir_pop_if(b, if_prim_export_thread);
}