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nir,ac/llvm: add nir_intrinsic_load_viewport_xy_scale_and_offset

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Used by RADV/Radeonsi NGG culling. Pack them into a single vec4
load for radeonsi to reduce const buffer load.

Acked-by: Marek Olšák <marek.olsak@amd.com>
Reviewed-by: Timur Kristóf <timur.kristof@gmail.com>
Signed-off-by: Qiang Yu <yuq825@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/17651>
This commit is contained in:
Qiang Yu 2022-08-03 16:45:36 +08:00 • committed by Marge Bot
parent 1aef9c8318
commit a19dcdf9d5
3 changed files with 4 additions and 2 deletions
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1
src/amd/llvm/ac_nir_to_llvm.c
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@ -3573,6 +3573,7 @@ static void visit_intrinsic(struct ac_nir_context *ctx, nir_intrinsic_instr *ins
case nir_intrinsic_load_tess_rel_patch_id_amd:
case nir_intrinsic_load_patch_vertices_in:
case nir_intrinsic_load_sample_mask_in:
case nir_intrinsic_load_viewport_xy_scale_and_offset:
case nir_intrinsic_load_ring_tess_factors_amd:
case nir_intrinsic_load_ring_tess_offchip_amd:
case nir_intrinsic_load_ring_tess_offchip_offset_amd:

1
src/compiler/nir/nir_divergence_analysis.c
View file

@ -130,6 +130,7 @@ visit_intrinsic(nir_shader *shader, nir_intrinsic_instr *instr)
case nir_intrinsic_load_viewport_x_offset:
case nir_intrinsic_load_viewport_y_offset:
case nir_intrinsic_load_viewport_z_offset:
case nir_intrinsic_load_viewport_xy_scale_and_offset:
case nir_intrinsic_load_blend_const_color_a_float:
case nir_intrinsic_load_blend_const_color_b_float:
case nir_intrinsic_load_blend_const_color_g_float:

4
src/compiler/nir/nir_intrinsics.py
View file

@ -876,8 +876,6 @@ system_value("cull_mask", 1)
#
# Panfrost needs to implement all coordinate transformation in the
# vertex shader; system values allow us to share this routine in NIR.
#
# RADV uses these for NGG primitive culling.
system_value("viewport_x_scale", 1)
system_value("viewport_y_scale", 1)
system_value("viewport_z_scale", 1)
@ -886,6 +884,8 @@ system_value("viewport_y_offset", 1)
system_value("viewport_z_offset", 1)
system_value("viewport_scale", 3)
system_value("viewport_offset", 3)
# Pack xy scale and offset into a vec4 load (used by AMD NGG primitive culling)
system_value("viewport_xy_scale_and_offset", 4)
# Blend constant color values. Float values are clamped. Vectored versions are
# provided as well for driver convenience