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radv: Enable lowering dynamic quad broadcasts.

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This will lower dynamic quad broadcasts into something that both
LLVM and ACO can understand. On hardware which supports shuffles,
they are lowered to shuffle, on older hardware (GFX6-7) they will
get lowered to constant quad broadcasts.

Fixes dEQP-VK.subgroups.quad.*.subgroupquadbroadcast_nonconst_*

Cc: mesa-stable@lists.freedesktop.org
Signed-off-by: Timur Kristóf <timur.kristof@gmail.com>
Reviewed-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4147>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4147>
This commit is contained in:
Timur Kristóf
2020-03-11 15:05:47 +01:00
committed by Marge Bot
parent ec16535b49
commit 967eb23261
1 changed files with 3 additions and 0 deletions
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3
src/amd/vulkan/radv_shader.c
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@@ -480,6 +480,7 @@ radv_shader_compile_to_nir(struct radv_device *device,
nir_lower_global_vars_to_local(nir);
nir_remove_dead_variables(nir, nir_var_function_temp);
bool gfx7minus = device->physical_device->rad_info.chip_class <= GFX7;
nir_lower_subgroups(nir, &(struct nir_lower_subgroups_options) {
.subgroup_size = 64,
.ballot_bit_size = 64,
@@ -488,6 +489,8 @@ radv_shader_compile_to_nir(struct radv_device *device,
.lower_shuffle = 1,
.lower_shuffle_to_32bit = 1,
.lower_vote_eq_to_ballot = 1,
.lower_quad_broadcast_dynamic = 1,
.lower_quad_broadcast_dynamic_to_const = gfx7minus,
});
nir_lower_load_const_to_scalar(nir);