docs: Start mathifying TGSI insts.
diff --git a/src/gallium/docs/source/conf.py b/src/gallium/docs/source/conf.py
index 2b974b7..9b0c86b 100644
--- a/src/gallium/docs/source/conf.py
+++ b/src/gallium/docs/source/conf.py
@@ -22,7 +22,7 @@
# Add any Sphinx extension module names here, as strings. They can be extensions
# coming with Sphinx (named 'sphinx.ext.*') or your custom ones.
-extensions = []
+extensions = ['sphinx.ext.pngmath']
# Add any paths that contain templates here, relative to this directory.
templates_path = ['_templates']