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brw: subgroup lowering for jay

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Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@intel.com>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/40835>
This commit is contained in:
Alyssa Rosenzweig 2026-02-24 11:53:36 -05:00 • committed by Marge Bot
parent 2780a327fa
commit e8b9f26561
1 changed files with 16 additions and 2 deletions
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18
src/intel/compiler/brw/brw_nir.c
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@ -9,12 +9,14 @@
#include "compiler/glsl_types.h"
#include "compiler/nir/nir_builder.h"
#include "dev/intel_debug.h"
#include "dev/intel_device_info.h"
#include "util/sparse_bitset.h"
#include "intel_nir.h"
#include "nir.h"
#include "nir_builder_opcodes.h"
#include "nir_intrinsics.h"
#include "nir_intrinsics_indices.h"
#include "shader_enums.h"
/*
* Intel scratch swizzling can be described with the formula:
@ -1964,6 +1966,8 @@ brw_preprocess_nir(const struct brw_compiler *compiler, nir_shader *nir,
};
OPT(nir_lower_compute_system_values, &lower_csv_options);
bool jay = intel_use_jay(devinfo, nir->info.stage);
const nir_lower_subgroups_options subgroups_options = {
.subgroup_size = brw_nir_api_subgroup_size(nir, 0),
.ballot_bit_size = 32,
@ -1971,9 +1975,19 @@ brw_preprocess_nir(const struct brw_compiler *compiler, nir_shader *nir,
.lower_to_scalar = true,
.lower_relative_shuffle = true,
.lower_quad_broadcast_dynamic = true,
.lower_elect = true,
.lower_inverse_ballot = true,
.lower_elect = !jay,
.lower_inverse_ballot = !jay,
.lower_rotate_to_shuffle = true,
.lower_subgroup_masks = jay,
/* TODO: Optimize reduces. Or don't. I'm not your Mom. */
.lower_reduce = jay,
.lower_vote = jay,
.lower_vote_feq = jay,
.lower_vote_ieq = jay,
/* TODO: jay supports quad broadcast and should(?) do swaphorizontal */
.lower_quad = jay,
.lower_quad_vote = jay,
.lower_vote_bool_eq = jay,
};
OPT(nir_lower_subgroups, &subgroups_options);