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glsl: Retire dround lowering.

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We have competent lowering in NIR already available.

Drivers exposing CAP_DOUBLES but not SHADER_CAP_DROUND:
- d3d12 (NIR lowers ~0 if the underlying impl doesn't do floats)
- svga (Now sets the NIR lowering options)
- softpipe (Doesn't do GL4 so you can't use doubles anyway)
- llvmpipe (Lowers dround_even in NIR and passees the rest through
            successfully)
- zink (NIR lowers ~0 if the underlying impl doesn't do floats,
        otherwise passes things through successfully, except needed
        dround_even lowering to avoid lavapipe regression with
        native doubles)
- r600 (sets NIR rounding lowering flags, and lowers all fsign)

Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Acked-by: Faith Ekstrand <faith.ekstrand@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/25777>
This commit is contained in:
Eric Anholt
2023-10-18 08:30:22 +02:00
committed by Marge Bot
parent b416248cb5
commit aed6a39c10
27 changed files with 5 additions and 236 deletions
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docs/gallium/screen.rst
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@@ -740,8 +740,6 @@ support different features.
samplers.
* ``PIPE_SHADER_CAP_MAX_SAMPLER_VIEWS``: The maximum number of texture
sampler views. Must not be lower than PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS.
* ``PIPE_SHADER_CAP_DROUND_SUPPORTED``: Whether double precision rounding
is supported. If it is, DTRUNC/DCEIL/DFLR/DROUND opcodes may be used.
* ``PIPE_SHADER_CAP_TGSI_ANY_INOUT_DECL_RANGE``: Whether the driver doesn't
ignore tgsi_declaration_range::Last for shader inputs and outputs.
* ``PIPE_SHADER_CAP_MAX_SHADER_BUFFERS``: Maximum number of memory buffers