Add Chromium-only Blender WebEngine parity work

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

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+/* mpz_cmpabs(u,v) -- Compare U, V.  Return positive, zero, or negative
+   based on if U > V, U == V, or U < V.
+
+Copyright 1991, 1993, 1994, 1996, 1997, 2000-2002, 2020 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"
+
+
+int
+mpz_cmpabs (mpz_srcptr u, mpz_srcptr v) __GMP_NOTHROW
+{
+  mp_size_t  usize, vsize;
+  mp_srcptr  up, vp;
+  int        cmp;
+
+  usize = ABSIZ (u);
+  vsize = ABSIZ (v);
+  /* Cannot use usize - vsize, may overflow an "int" */
+  if (usize != vsize)
+    return (usize > vsize) ? 1 : -1;
+
+  up = PTR(u);
+  vp = PTR(v);
+  MPN_CMP (cmp, up, vp, usize);
+  return cmp;
+}