Add Chromium-only Blender WebEngine parity work

blender-5.2.0/extern/gmp-source/mpn/cray/popcount.c

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+/* Cray mpn_popcount -- population count.
+
+Copyright 2000 Free Software Foundation, Inc.
+
+This file is part of the GNU MP Library.
+
+The GNU MP Library is free software; you can redistribute it and/or modify
+it under the terms of either:
+
+  * the GNU Lesser General Public License as published by the Free
+    Software Foundation; either version 3 of the License, or (at your
+    option) any later version.
+
+or
+
+  * the GNU General Public License as published by the Free Software
+    Foundation; either version 2 of the License, or (at your option) any
+    later version.
+
+or both in parallel, as here.
+
+The GNU MP Library is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+You should have received copies of the GNU General Public License and the
+GNU Lesser General Public License along with the GNU MP Library.  If not,
+see https://www.gnu.org/licenses/.  */
+
+#include <intrinsics.h>
+#include "gmp-impl.h"
+
+unsigned long int
+mpn_popcount (mp_srcptr p, mp_size_t n)
+{
+  unsigned long int result = 0;
+  mp_size_t i;
+  for (i = 0; i < n; i++)
+    result += _popcnt (p[i]);
+  return result;
+}