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/mpf/set_q.c b/third_party/gmp/mpf/set_q.c
new file mode 100644
index 0000000..b0b7fe3
--- /dev/null
+++ b/third_party/gmp/mpf/set_q.c
@@ -0,0 +1,118 @@
+/* mpf_set_q (mpf_t rop, mpq_t op) -- Convert the rational op to the float rop.
+
+Copyright 1996, 1999, 2001, 2002, 2004, 2005, 2016 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"
+
+
+/* As usual the aim is to produce PREC(r) limbs, with the high non-zero. The
+ basic mpn_div_q produces a quotient of nsize-dsize+1 limbs, with either the
+ high or second highest limb non-zero. We arrange for nsize-dsize+1 to equal
+ prec+1, hence giving either prec or prec+1 result limbs at PTR(r).
+
+ nsize-dsize+1 == prec+1 is achieved by adjusting num(q), either dropping low
+ limbs if it's too big, or padding with low zeros if it's too small. The
+ full given den(q) is always used.
+
+ We cannot truncate den(q), because even when it's much bigger than prec the
+ last limbs can still influence the final quotient. Often they don't, but we
+ leave optimization of that to mpn_div_q.
+
+ Enhancements:
+
+ The high quotient limb is non-zero when high{np,dsize} > {dp,dsize}. We
+ could make that comparison and use qsize==prec instead of qsize==prec+1,
+ to save one limb in the division. */
+
+void
+mpf_set_q (mpf_t r, mpq_srcptr q)
+{
+ mp_srcptr np, dp;
+ mp_size_t prec, nsize, dsize, qsize, prospective_qsize, tsize, zeros;
+ mp_size_t sign_quotient, high_zero;
+ mp_ptr qp, tp;
+ mp_exp_t exp;
+ TMP_DECL;
+
+ ASSERT (SIZ(&q->_mp_den) > 0); /* canonical q */
+
+ nsize = SIZ (&q->_mp_num);
+ dsize = SIZ (&q->_mp_den);
+
+ if (UNLIKELY (nsize == 0))
+ {
+ SIZ (r) = 0;
+ EXP (r) = 0;
+ return;
+ }
+
+ TMP_MARK;
+
+ prec = PREC (r);
+ qp = PTR (r);
+
+ sign_quotient = nsize;
+ nsize = ABS (nsize);
+ np = PTR (&q->_mp_num);
+ dp = PTR (&q->_mp_den);
+
+ prospective_qsize = nsize - dsize + 1; /* q from using given n,d sizes */
+ exp = prospective_qsize; /* ie. number of integer limbs */
+ qsize = prec + 1; /* desired q */
+
+ zeros = qsize - prospective_qsize; /* n zeros to get desired qsize */
+ tsize = nsize + zeros; /* size of intermediate numerator */
+ tp = TMP_ALLOC_LIMBS (tsize + 1); /* +1 for mpn_div_q's scratch */
+
+ if (zeros > 0)
+ {
+ /* pad n with zeros into temporary space */
+ MPN_ZERO (tp, zeros);
+ MPN_COPY (tp+zeros, np, nsize);
+ np = tp; /* mpn_div_q allows this overlap */
+ }
+ else
+ {
+ /* shorten n to get desired qsize */
+ np -= zeros;
+ }
+
+ ASSERT (tsize-dsize+1 == qsize);
+ mpn_div_q (qp, np, tsize, dp, dsize, tp);
+
+ /* strip possible zero high limb */
+ high_zero = (qp[qsize-1] == 0);
+ qsize -= high_zero;
+ exp -= high_zero;
+
+ EXP (r) = exp;
+ SIZ (r) = sign_quotient >= 0 ? qsize : -qsize;
+
+ TMP_FREE;
+}