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r600: fix rv770 clamp to max_texel_buffer_elements

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This change fixes the clamp to max_texel_buffer_elements
issue related to rv770 and older gpus.

Here are the tests fixed on rv770:
spec/arb_texture_buffer_object/texture-buffer-size-clamp/r8ui_texture_buffer_size_via_sampler: fail pass
spec/arb_texture_buffer_object/texture-buffer-size-clamp/rg8ui_texture_buffer_size_via_sampler: fail pass
spec/arb_texture_buffer_object/texture-buffer-size-clamp/rgba8ui_texture_buffer_size_via_sampler: fail pass

Fixes: 1a441ad5cb ("r600: clamp to max_texel_buffer_elements")
Signed-off-by: Patrick Lerda <patrick9876@free.fr>
(cherry picked from commit afcead9158)

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/39745>
This commit is contained in:
Patrick Lerda 2026-01-19 13:11:28 +01:00 • committed by Dylan Baker
parent 99501a214a
commit b24628f4b7
2 changed files with 6 additions and 3 deletions
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2
.pick_status.json
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@ -1554,7 +1554,7 @@
"description": "r600: fix rv770 clamp to max_texel_buffer_elements",
"nominated": true,
"nomination_type": 2,
"resolution": 0,
"resolution": 1,
"main_sha": null,
"because_sha": "1a441ad5cb58e8169a0d83dd63a7c38462cdb18b",
"notes": null

7
src/gallium/drivers/r600/r600_state_common.c
View file

@ -1466,8 +1466,11 @@ static void r600_setup_buffer_constants(struct r600_context *rctx, int shader_ty
} else
constants[offset + 4] = 0;
constants[offset + 5] = samplers->views.views[i]->base.u.buf.size /
util_format_get_blocksize(samplers->views.views[i]->base.format);
constants[offset + 5] = MIN2(util_format_get_blocksize(samplers->views.views[i]->base.format) *
rctx->screen->b.b.caps.max_texel_buffer_elements,
samplers->views.views[i]->base.u.buf.size) /
util_format_get_blocksize(samplers->views.views[i]->base.format);
constants[offset + 6] = samplers->views.views[i]->base.texture->array_size / 6;
}
}