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nir: Document extra image source

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I was scratching my head about this for a few minutes until I found the answer
in spirv_to_nir. Hopefully this saves someone else some head scratching in turn.

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Reviewed-by: Faith Ekstrand <faith.ekstrand@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/23120>
This commit is contained in:
Alyssa Rosenzweig 2023-05-18 21:45:45 -04:00 • committed by Marge Bot
parent 32b150344e
commit c3ea2f8d20
1 changed files with 3 additions and 0 deletions
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3
src/compiler/nir/nir_intrinsics.py
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@ -641,6 +641,9 @@ atomic3("atomic_counter_comp_swap")
# argument with the value to be written, and image atomic operations take
# either one or two additional scalar arguments with the same meaning as in
# the ARB_shader_image_load_store specification.
#
# The last source of many image intrinsics is the LOD. This source is zero
# unless e.g. SPV_AMD_shader_image_load_store_lod is supported.
def image(name, src_comp=[], extra_indices=[], **kwargs):
intrinsic("image_deref_" + name, src_comp=[-1] + src_comp,
indices=[IMAGE_DIM, IMAGE_ARRAY, FORMAT, ACCESS] + extra_indices, **kwargs)