From 11da511c784eca003deb90c23570f0873954e0de Mon Sep 17 00:00:00 2001
From: Duncan Wilkie <antigravityd@gmail.com>
Date: Sat, 18 Nov 2023 06:11:09 -0600
Subject: Initial commit.

---
 gmp-6.3.0/mpn/generic/dcpi1_div_q.c | 86 +++++++++++++++++++++++++++++++++++++
 1 file changed, 86 insertions(+)
 create mode 100644 gmp-6.3.0/mpn/generic/dcpi1_div_q.c

(limited to 'gmp-6.3.0/mpn/generic/dcpi1_div_q.c')

diff --git a/gmp-6.3.0/mpn/generic/dcpi1_div_q.c b/gmp-6.3.0/mpn/generic/dcpi1_div_q.c
new file mode 100644
index 0000000..1905c98
--- /dev/null
+++ b/gmp-6.3.0/mpn/generic/dcpi1_div_q.c
@@ -0,0 +1,86 @@
+/* mpn_dc_div_q -- divide-and-conquer division, returning exact quotient
+   only.
+
+   Contributed to the GNU project by Torbjorn Granlund and Marco Bodrato.
+
+   THE FUNCTION IN THIS FILE IS INTERNAL WITH A MUTABLE INTERFACE.  IT IS ONLY
+   SAFE TO REACH IT THROUGH DOCUMENTED INTERFACES.  IN FACT, IT IS ALMOST
+   GUARANTEED THAT IT WILL CHANGE OR DISAPPEAR IN A FUTURE GMP RELEASE.
+
+Copyright 2006, 2007, 2009, 2010 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"
+
+
+mp_limb_t
+mpn_dcpi1_div_q (mp_ptr qp, mp_ptr np, mp_size_t nn,
+		 mp_srcptr dp, mp_size_t dn, gmp_pi1_t *dinv)
+{
+  mp_ptr tp, wp;
+  mp_limb_t qh;
+  mp_size_t qn;
+  TMP_DECL;
+
+  TMP_MARK;
+
+  ASSERT (dn >= 6);
+  ASSERT (nn - dn >= 3);
+  ASSERT (dp[dn-1] & GMP_NUMB_HIGHBIT);
+
+  tp = TMP_ALLOC_LIMBS (nn + 1);
+  MPN_COPY (tp + 1, np, nn);
+  tp[0] = 0;
+
+  qn = nn - dn;
+  wp = TMP_ALLOC_LIMBS (qn + 1);
+
+  qh = mpn_dcpi1_divappr_q (wp, tp, nn + 1, dp, dn, dinv);
+
+  if (wp[0] == 0)
+    {
+      mp_limb_t cy;
+
+      if (qn > dn)
+	mpn_mul (tp, wp + 1, qn, dp, dn);
+      else
+	mpn_mul (tp, dp, dn, wp + 1, qn);
+
+      cy = (qh != 0) ? mpn_add_n (tp + qn, tp + qn, dp, dn) : 0;
+
+      if (cy || mpn_cmp (tp, np, nn) > 0) /* At most is wrong by one, no cycle. */
+	qh -= mpn_sub_1 (qp, wp + 1, qn, 1);
+      else /* Same as below */
+	MPN_COPY (qp, wp + 1, qn);
+    }
+  else
+    MPN_COPY (qp, wp + 1, qn);
+
+  TMP_FREE;
+  return qh;
+}
-- 
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