Revert "Remove gmp from AOS"
This reverts commit f37c97684f0910a3f241394549392f00145ab0f7.
We need gmp for SymEngine for symbolicmanipultion in C++
Change-Id: Ia13216d1715cf96944f7b4f422b7a799f921d4a4
Signed-off-by: Austin Schuh <austin.linux@gmail.com>
diff --git a/third_party/gmp/mpz/powm_sec.c b/third_party/gmp/mpz/powm_sec.c
new file mode 100644
index 0000000..a2581a8
--- /dev/null
+++ b/third_party/gmp/mpz/powm_sec.c
@@ -0,0 +1,102 @@
+/* mpz_powm_sec(res,base,exp,mod) -- Set R to (U^E) mod M.
+
+ Contributed to the GNU project by Torbjorn Granlund.
+
+Copyright 1991, 1993, 1994, 1996, 1997, 2000-2002, 2005, 2008, 2009,
+2012, 2015 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_powm_sec (mpz_ptr r, mpz_srcptr b, mpz_srcptr e, mpz_srcptr m)
+{
+ mp_size_t n;
+ mp_ptr rp, tp;
+ mp_srcptr bp, ep, mp;
+ mp_size_t rn, bn, es, en;
+ TMP_DECL;
+
+ n = ABSIZ(m);
+
+ mp = PTR(m);
+
+ if (UNLIKELY ((n == 0) || (mp[0] % 2 == 0)))
+ DIVIDE_BY_ZERO;
+
+ es = SIZ(e);
+ if (UNLIKELY (es <= 0))
+ {
+ if (es == 0)
+ {
+ /* b^0 mod m, b is anything and m is non-zero.
+ Result is 1 mod m, i.e., 1 or 0 depending on if m = 1. */
+ SIZ(r) = n != 1 || mp[0] != 1;
+ MPZ_NEWALLOC (r, 1)[0] = 1;
+ return;
+ }
+ DIVIDE_BY_ZERO;
+ }
+ en = es;
+
+ bn = ABSIZ(b);
+
+ if (UNLIKELY (bn == 0))
+ {
+ SIZ(r) = 0;
+ return;
+ }
+
+ TMP_MARK;
+ TMP_ALLOC_LIMBS_2 (rp, n,
+ tp, mpn_sec_powm_itch (bn, en * GMP_NUMB_BITS, n));
+
+ bp = PTR(b);
+ ep = PTR(e);
+
+ mpn_sec_powm (rp, bp, bn, ep, en * GMP_NUMB_BITS, mp, n, tp);
+
+ rn = n;
+
+ MPN_NORMALIZE (rp, rn);
+
+ if ((ep[0] & 1) && SIZ(b) < 0 && rn != 0)
+ {
+ mpn_sub (rp, PTR(m), n, rp, rn);
+ rn = n;
+ MPN_NORMALIZE (rp, rn);
+ }
+
+ MPZ_NEWALLOC (r, rn);
+ SIZ(r) = rn;
+ MPN_COPY (PTR(r), rp, rn);
+
+ TMP_FREE;
+}