xfail on 32bit platform

Author: xaris96

pandas/tests/window/test_rolling.py

@@ -2,6 +2,7 @@
     datetime,
     timedelta,
 )
+import platform
 
 import numpy as np
 import pytest
@@ -1082,8 +1083,11 @@ def test_rolling_sem(frame_or_series):
 
 
 @pytest.mark.xfail(
-    is_platform_arm() or is_platform_power() or is_platform_riscv64(),
-    reason="GH 38921",
+    is_platform_arm()
+    or is_platform_power()
+    or is_platform_riscv64()
+    or platform.architecture()[0] == "32bit",
+    reason="GH 38921: known numerical instability on 32-bit platforms",
 )
 @pytest.mark.parametrize(
     ("func", "third_value", "values"),