> I've tested this on the Loongson 3A machine, and it works as expected.

Python fails for me on Lemote YeeLoong.

$ git rev-parse HEAD
32d5c729522d02fe973cb245fe26262f040e0c13

======================================================================
FAIL: test_issue_8959_a (ctypes.test.test_callbacks.SampleCallbacksTestCase)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/tmp/nix-build-python-3.3.5.drv-0/Python-3.3.5/Lib/ctypes/test/test_callbacks.py", line 191, in test_issue_8959_a
    self.assertEqual(array[:], [1, 5, 7, 33, 99])
AssertionError: Lists differ: [33, 7, 99, 1, 5] != [1, 5, 7, 33, 99]

First differing element 0:
33
1

- [33, 7, 99, 1, 5]
+ [1, 5, 7, 33, 99]

======================================================================
FAIL: test_qsort (ctypes.test.test_libc.LibTest)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/tmp/nix-build-python-3.3.5.drv-0/Python-3.3.5/Lib/ctypes/test/test_libc.py", line 30, in test_qsort
    self.assertEqual(chars.raw, b"   ,,aaaadmmmnpppsss\x00")
AssertionError: b'mmaappss  dna ,,maps\x00' != b'   ,,aaaadmmmnpppsss\x00'

----------------------------------------------------------------------
Ran 346 tests in 6.696s

FAILED (failures=2, skipped=1)
Makefile:882: recipe for target 'test' failed
make: *** [test] Error 1
phase `check' failed after 3765 seconds
builder for `/gnu/store/1sryxkz1hbvvw38c86miw14xydbjzv0i-python-3.3.5.drv' failed with exit code 1
@ build-failed /gnu/store/1sryxkz1hbvvw38c86miw14xydbjzv0i-python-3.3.5.drv - 1 builder for `/gnu/store/1sryxkz1hbvvw38c86miw14xydbjzv0i-python-3.3.5.drv' failed with exit code 1
cannot build derivation `/gnu/store/h05a7j9f7p21m1jkkyy48vg3zn5wikb7-python-wrapper-3.3.5.drv': 1 dependencies couldn't be built