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mesa/st: Only use 16-bit ints or floats in the NIR path.

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For i915g or other drivers using the draw path, llvmpipe (reasonably)
reports int16 support.  However, if we try to link and translate an int16
shader using st_glsl_to_tgsi, it will throw assertion failures.

Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/10874>
This commit is contained in:
Emma Anholt 2021-05-17 12:08:35 -07:00 • committed by Marge Bot
parent 307139c7f9
commit c2f80baa93
1 changed files with 12 additions and 10 deletions
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22
src/mesa/state_tracker/st_extensions.c
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@ -379,16 +379,18 @@ void st_init_limits(struct pipe_screen *screen,
options->LowerBuiltinVariablesXfb |= VARYING_BIT_PSIZ;
}
options->LowerPrecisionFloat16 =
screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_FP16);
options->LowerPrecisionDerivatives =
screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_FP16_DERIVATIVES);
options->LowerPrecisionInt16 =
screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_INT16);
options->LowerPrecisionConstants =
screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_GLSL_16BIT_CONSTS);
options->LowerPrecisionFloat16Uniforms =
screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_FP16_CONST_BUFFERS);
if (prefer_nir) {
options->LowerPrecisionFloat16 =
screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_FP16);
options->LowerPrecisionDerivatives =
screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_FP16_DERIVATIVES);
options->LowerPrecisionInt16 =
screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_INT16);
options->LowerPrecisionConstants =
screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_GLSL_16BIT_CONSTS);
options->LowerPrecisionFloat16Uniforms =
screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_FP16_CONST_BUFFERS);
}
}
c->MaxUserAssignableUniformLocations =