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ac/nir/cull: Slightly refactor control flow for small primitive culling.

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Move the NIR control flow out of the cull_small_primitive_triangle
function to make it more readable and follow the other functions.

Signed-off-by: Timur Kristóf <timur.kristof@gmail.com>
Acked-by: Marek Olšák <marek.olsak@amd.com>
Reviewed-by: Georg Lehmann <dadschoorse@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/31973>
This commit is contained in:
Timur Kristóf 2024-11-05 02:54:56 +01:00
parent 218c824e27
commit 24ccd134a6
1 changed files with 29 additions and 29 deletions
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58
src/amd/common/ac_nir_cull.c
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@ -88,40 +88,33 @@ cull_frustrum(nir_builder *b, nir_def *bbox_min[2], nir_def *bbox_max[2])
}
static nir_def *
cull_small_primitive_triangle(nir_builder *b, nir_def *bbox_min[2], nir_def *bbox_max[2],
nir_def *prim_is_small_else)
cull_small_primitive_triangle(nir_builder *b, nir_def *bbox_min[2], nir_def *bbox_max[2])
{
nir_def *prim_is_small = NULL;
nir_def *vp = nir_load_cull_triangle_viewport_xy_scale_and_offset_amd(b);
nir_def *small_prim_precision = nir_load_cull_small_triangle_precision_amd(b);
nir_def *rejected = nir_imm_false(b);
nir_if *if_cull_small_prims = nir_push_if(b, nir_load_cull_small_triangles_enabled_amd(b));
{
nir_def *vp = nir_load_cull_triangle_viewport_xy_scale_and_offset_amd(b);
nir_def *small_prim_precision = nir_load_cull_small_triangle_precision_amd(b);
prim_is_small = prim_is_small_else;
for (unsigned chan = 0; chan < 2; ++chan) {
nir_def *vp_scale = nir_channel(b, vp, chan);
nir_def *vp_translate = nir_channel(b, vp, 2 + chan);
for (unsigned chan = 0; chan < 2; ++chan) {
nir_def *vp_scale = nir_channel(b, vp, chan);
nir_def *vp_translate = nir_channel(b, vp, 2 + chan);
/* Convert the position to screen-space coordinates. */
nir_def *min = nir_ffma(b, bbox_min[chan], vp_scale, vp_translate);
nir_def *max = nir_ffma(b, bbox_max[chan], vp_scale, vp_translate);
/* Convert the position to screen-space coordinates. */
nir_def *min = nir_ffma(b, bbox_min[chan], vp_scale, vp_translate);
nir_def *max = nir_ffma(b, bbox_max[chan], vp_scale, vp_translate);
/* Scale the bounding box according to precision. */
min = nir_fsub(b, min, small_prim_precision);
max = nir_fadd(b, max, small_prim_precision);
/* Scale the bounding box according to precision. */
min = nir_fsub(b, min, small_prim_precision);
max = nir_fadd(b, max, small_prim_precision);
/* Determine if the bbox intersects the sample point, by checking if the min and max round to the same int. */
min = nir_fround_even(b, min);
max = nir_fround_even(b, max);
/* Determine if the bbox intersects the sample point, by checking if the min and max round to the same int. */
min = nir_fround_even(b, min);
max = nir_fround_even(b, max);
nir_def *rounded_to_eq = nir_feq(b, min, max);
prim_is_small = nir_ior(b, prim_is_small, rounded_to_eq);
}
nir_def *rounded_to_eq = nir_feq(b, min, max);
rejected = nir_ior(b, rejected, rounded_to_eq);
}
nir_pop_if(b, if_cull_small_prims);
return nir_if_phi(b, prim_is_small, prim_is_small_else);
return rejected;
}
static nir_def *
@ -144,10 +137,17 @@ ac_nir_cull_triangle(nir_builder *b,
calc_bbox_triangle(b, pos, bbox_min, bbox_max);
nir_def *prim_outside_view = cull_frustrum(b, bbox_min, bbox_max);
nir_def *prim_invisible =
cull_small_primitive_triangle(b, bbox_min, bbox_max, prim_outside_view);
nir_def *bbox_rejected = prim_outside_view;
bbox_accepted = nir_ior(b, nir_inot(b, prim_invisible), w_info->any_w_negative);
nir_if *if_cull_small_prims = nir_push_if(b, nir_load_cull_small_triangles_enabled_amd(b));
{
nir_def *small_prim_rejected = cull_small_primitive_triangle(b, bbox_min, bbox_max);
bbox_rejected = nir_ior(b, bbox_rejected, small_prim_rejected);
}
nir_pop_if(b, if_cull_small_prims);
bbox_rejected = nir_if_phi(b, bbox_rejected, prim_outside_view);
bbox_accepted = nir_ior(b, nir_inot(b, bbox_rejected), w_info->any_w_negative);
/* for caller which need to react when primitive is accepted */
if (accept_func) {