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-rw-r--r--src/gallium/docs/source/screen.rst4
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diff --git a/src/gallium/docs/source/screen.rst b/src/gallium/docs/source/screen.rst
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--- a/src/gallium/docs/source/screen.rst
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@@ -463,6 +463,10 @@ to be 0.
* ``PIPE_SHADER_CAP_SUPPORTED_IRS``: Supported representations of the
program. It should be a mask of ``pipe_shader_ir`` bits.
* ``PIPE_SHADER_CAP_MAX_SHADER_IMAGES``: Maximum number of image units.
+* ``PIPE_SHADER_CAP_LOWER_IF_THRESHOLD``: IF and ELSE branches with a lower
+ cost than this value should be lowered by the state tracker for better
+ performance. This is a tunable for the GLSL compiler and the behavior is
+ specific to the compiler.
.. _pipe_compute_cap: