Add libgmp 6.2.0 to third_party
Don't build it yet. That will come in the next review.
Change-Id: Idf3266558165e5ab45f4a41c98cc8c838c8244d5
diff --git a/third_party/gmp/mpz/ior.c b/third_party/gmp/mpz/ior.c
new file mode 100644
index 0000000..32f3042
--- /dev/null
+++ b/third_party/gmp/mpz/ior.c
@@ -0,0 +1,184 @@
+/* mpz_ior -- Logical inclusive or.
+
+Copyright 1991, 1993, 1994, 1996, 1997, 2000, 2001, 2005, 2012, 2013,
+2015-2018 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_ior (mpz_ptr res, mpz_srcptr op1, mpz_srcptr op2)
+{
+ mp_srcptr op1_ptr, op2_ptr;
+ mp_size_t op1_size, op2_size;
+ mp_ptr res_ptr;
+ mp_size_t res_size;
+ mp_size_t i;
+
+ op1_size = SIZ(op1);
+ op2_size = SIZ(op2);
+
+ if (op1_size < op2_size)
+ {
+ MPZ_SRCPTR_SWAP (op1, op2);
+ MP_SIZE_T_SWAP (op1_size, op2_size);
+ }
+
+ op1_ptr = PTR(op1);
+ res_ptr = PTR(res);
+
+ if (op2_size >= 0)
+ {
+ if (res_ptr != op1_ptr)
+ {
+ res_ptr = MPZ_REALLOC (res, op1_size);
+ /* No overlapping possible: op1_ptr = PTR(op1); */
+ MPN_COPY (res_ptr + op2_size, op1_ptr + op2_size,
+ op1_size - op2_size);
+ }
+ if (LIKELY (op2_size != 0))
+ mpn_ior_n (res_ptr, op1_ptr, PTR(op2), op2_size);
+
+ SIZ(res) = op1_size;
+ }
+ else
+ {
+ mp_ptr opx;
+ TMP_DECL;
+
+ TMP_MARK;
+ if (op1_size < 0)
+ {
+ mp_ptr opy;
+
+ /* Both operands are negative, so will be the result.
+ -((-OP1) | (-OP2)) = -(~(OP1 - 1) | ~(OP2 - 1)) =
+ = ~(~(OP1 - 1) | ~(OP2 - 1)) + 1 =
+ = ((OP1 - 1) & (OP2 - 1)) + 1 */
+
+ res_size = -op1_size;
+
+ /* Possible optimization: Decrease mpn_sub precision,
+ as we won't use the entire res of both. */
+ TMP_ALLOC_LIMBS_2 (opx, res_size, opy, res_size);
+ mpn_sub_1 (opx, op1_ptr, res_size, (mp_limb_t) 1);
+ op1_ptr = opx;
+
+ mpn_sub_1 (opy, PTR(op2), res_size, (mp_limb_t) 1);
+ op2_ptr = opy;
+
+ /* First loop finds the size of the result. */
+ for (i = res_size; --i >= 0;)
+ if ((op1_ptr[i] & op2_ptr[i]) != 0)
+ break;
+ res_size = i + 1;
+
+ res_ptr = MPZ_NEWALLOC (res, res_size + 1);
+
+ if (res_size != 0)
+ {
+ /* Second loop computes the real result. */
+ mpn_and_n (res_ptr, op1_ptr, op2_ptr, res_size);
+
+ res_ptr[res_size] = 0;
+ MPN_INCR_U (res_ptr, res_size + 1, 1);
+ res_size += res_ptr[res_size];
+ }
+ else
+ {
+ res_ptr[0] = 1;
+ res_size = 1;
+ }
+
+ SIZ(res) = -res_size;
+ }
+ else
+ {
+ mp_limb_t cy;
+ mp_size_t count;
+
+ /* Operand 2 negative, so will be the result.
+ -(OP1 | (-OP2)) = -(OP1 | ~(OP2 - 1)) =
+ = ~(OP1 | ~(OP2 - 1)) + 1 =
+ = (~OP1 & (OP2 - 1)) + 1 */
+
+ op2_size = -op2_size;
+
+ res_ptr = MPZ_REALLOC (res, op2_size);
+ op1_ptr = PTR(op1);
+
+ opx = TMP_ALLOC_LIMBS (op2_size);
+ mpn_sub_1 (opx, PTR(op2), op2_size, (mp_limb_t) 1);
+ op2_ptr = opx;
+ op2_size -= op2_ptr[op2_size - 1] == 0;
+
+ if (op1_size >= op2_size)
+ {
+ /* We can just ignore the part of OP1 that stretches above OP2,
+ because the result limbs are zero there. */
+
+ /* First loop finds the size of the result. */
+ for (i = op2_size; --i >= 0;)
+ if ((~op1_ptr[i] & op2_ptr[i]) != 0)
+ break;
+ res_size = i + 1;
+ count = res_size;
+ }
+ else
+ {
+ res_size = op2_size;
+
+ /* Copy the part of OP2 that stretches above OP1, to RES. */
+ MPN_COPY (res_ptr + op1_size, op2_ptr + op1_size, op2_size - op1_size);
+ count = op1_size;
+ }
+
+ if (res_size != 0)
+ {
+ /* Second loop computes the real result. */
+ if (LIKELY (count != 0))
+ mpn_andn_n (res_ptr, op2_ptr, op1_ptr, count);
+
+ cy = mpn_add_1 (res_ptr, res_ptr, res_size, (mp_limb_t) 1);
+ if (cy)
+ {
+ res_ptr[res_size] = cy;
+ ++res_size;
+ }
+ }
+ else
+ {
+ res_ptr[0] = 1;
+ res_size = 1;
+ }
+
+ SIZ(res) = -res_size;
+ }
+ TMP_FREE;
+ }
+}