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nir/lower_image: support FMASK loads with a 16-bit sample index 

Reviewed-by: Georg Lehmann <dadschoorse@gmail.com>
Reviewed-by: Timur Kristóf <timur.kristof@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/28845>
This commit is contained in:
Marek Olšák 2024-04-13 18:09:38 -04:00 committed by Marge Bot
parent a01712874d
commit d802aca523
1 changed files with 3 additions and 2 deletions
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5
src/compiler/nir/nir_lower_image.c
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@ -114,12 +114,13 @@ lower_image_to_fragment_mask_load(nir_builder *b, nir_intrinsic_instr *intrin)
/* extract real color buffer index from fmask buffer */
nir_def *sample_index_old = intrin->src[2].ssa;
nir_def *fmask_offset = nir_ishl_imm(b, sample_index_old, 2);
nir_def *fmask_offset = nir_u2u32(b, nir_ishl_imm(b, sample_index_old, 2));
nir_def *fmask_width = nir_imm_int(b, 3);
nir_def *sample_index_new = nir_ubfe(b, fmask, fmask_offset, fmask_width);
/* fix color buffer load */
nir_src_rewrite(&intrin->src[2], sample_index_new);
nir_src_rewrite(&intrin->src[2],
nir_u2uN(b, sample_index_new, sample_index_old->bit_size));
/* Mark uses fmask to prevent lower this intrinsic again. */
enum gl_access_qualifier access = nir_intrinsic_access(intrin);