pan/gen_pack: Use 1U for unpacking log2 to avoid undefined behaviour

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/11869>

diff --git a/src/panfrost/lib/gen_pack.py b/src/panfrost/lib/gen_pack.py
index 8f9411a..72cc644 100644 (file)
--- a/src/panfrost/lib/gen_pack.py
+++ b/src/panfrost/lib/gen_pack.py
@@ -613,7 +613,7 @@ class Group(object):
                 elif field.modifier[0] == "shr":
                     suffix = " << {}".format(field.modifier[1])
                 if field.modifier[0] == "log2":
-                    prefix = "1 << "
+                    prefix = "1U << "
 
             decoded = '{}{}({}){}'.format(prefix, convert, ', '.join(args), suffix)