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nir/lower_tex: revert "optimize LOD bias lower for txl"

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This reverts commit f853d285ef.

Failing a GL CTS test
https://gitlab.khronos.org/Tracker/vk-gl-cts/-/issues/5866 .. apparently I ran
VK CTS but not GL CTS on that MR. Oops.

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/35949>
This commit is contained in:
Alyssa Rosenzweig 2025-07-10 11:15:39 -04:00
parent 9385ea1bf0
commit 329413992e
1 changed files with 1 additions and 5 deletions
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6
src/compiler/nir/nir_lower_tex.c
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@ -1509,11 +1509,7 @@ lower_sampler_lod_bias(nir_builder *b, nir_tex_instr *tex)
nir_def *orig = nir_steal_tex_src(tex, src);
if (orig) {
/* If bias is 16-bit but orig is 32-bit, we do a 32-bit add so the
* float conversions can fold away (which could not happen with a
* 16-bit add.)
*/
bias = nir_f2f16(b, nir_fadd(b, nir_f2fN(b, bias, orig->bit_size), orig));
bias = nir_fadd(b, bias, nir_f2f16(b, orig));
}
nir_tex_instr_add_src(tex, src, bias);