Add Chromium-only Blender WebEngine parity work

blender-5.2.0/extern/gmp-source/mpz/pow_ui.c

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+/* mpz_pow_ui -- mpz raised to ulong.
+
+Copyright 2001, 2008 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 "gmp-impl.h"
+
+void
+mpz_pow_ui (mpz_ptr r, mpz_srcptr b, unsigned long int e)
+{
+  /* We test some small exponents here, mainly to avoid the overhead of
+     mpz_n_pow_ui for small bases and exponents.  */
+  switch (e)
+    {
+    case 0:
+      mpz_set_ui (r, 1);
+      break;
+    case 1:
+      mpz_set (r, b);
+      break;
+    case 2:
+      mpz_mul (r, b, b);
+      break;
+    default:
+      mpz_n_pow_ui (r, PTR(b), (mp_size_t) SIZ(b), e);
+    }
+}