BUILD: Disable MMX registers when building with -mavx512f

Raghuveer Devulapalli · Raghuveer Devulapalli · commit b3eed1459ccd · 2022-02-28T10:37:11.000-08:00
Work around for a bug in gcc compiler. When using several kmask
variables __mmask16/__mmask8, the compiler sometimes uses %mmx registers
to save them on to the stack which corrupts the x87 stack.
diff --git a/numpy/distutils/ccompiler_opt.py b/numpy/distutils/ccompiler_opt.py
@@ -346,7 +346,7 @@ class attribute `conf_features`, also its override
             FMA4   = dict(flags="-mfma4"),
             FMA3   = dict(flags="-mfma"),
             AVX2   = dict(flags="-mavx2"),
-            AVX512F = dict(flags="-mavx512f"),
+            AVX512F = dict(flags="-mavx512f -mno-mmx"),
             AVX512CD = dict(flags="-mavx512cd"),
             AVX512_KNL = dict(flags="-mavx512er -mavx512pf"),
             AVX512_KNM = dict(
