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pco: discard invalid instances depending on the sample & valid masks

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Signed-off-by: Simon Perretta <simon.perretta@imgtec.com>
Acked-by: Erik Faye-Lund <erik.faye-lund@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/37512>
This commit is contained in:
Simon Perretta 2025-09-12 11:00:50 +01:00 • committed by Marge Bot
parent 7fdf3683bc
commit 41a759bcbe
1 changed files with 17 additions and 2 deletions
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19
src/imagination/pco/pco_nir_pvfio.c
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@ -531,6 +531,9 @@ static nir_def *lower_pfo(nir_builder *b, nir_instr *instr, void *cb_data)
static bool lower_isp_fb(nir_builder *b, struct pfo_state *state)
{
if (b->shader->info.internal)
return false;
bool has_depth_feedback = !!state->depth_feedback_src;
if (b->shader->info.writes_memory && !has_depth_feedback) {
nir_variable *var_pos = nir_get_variable_with_location(b->shader,
@ -557,8 +560,20 @@ static bool lower_isp_fb(nir_builder *b, struct pfo_state *state)
has_depth_feedback = true;
}
if (!has_depth_feedback && !state->has_discards)
return false;
if (!state->has_discards) {
b->cursor = nir_after_instr(&state->last_discard_store->instr);
nir_def *smp_msk = nir_ishl(b, nir_imm_int(b, 1), nir_load_sample_id(b));
smp_msk = nir_iand(b, smp_msk, nir_load_sample_mask_in(b));
nir_def *cond = nir_ieq_imm(b, smp_msk, 0);
nir_def *val = nir_load_reg(b, state->discard_cond_reg);
val = nir_ior(b, val, cond);
state->last_discard_store =
nir_build_store_reg(b, val, state->discard_cond_reg);
state->has_discards = true;
}
/* Insert isp feedback instruction before the first store,
* or if there are no stores, at the end.