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/mpz/tdiv_r_2exp.c | 76 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 76 insertions(+)
 create mode 100644 gmp-6.3.0/mpz/tdiv_r_2exp.c

(limited to 'gmp-6.3.0/mpz/tdiv_r_2exp.c')

diff --git a/gmp-6.3.0/mpz/tdiv_r_2exp.c b/gmp-6.3.0/mpz/tdiv_r_2exp.c
new file mode 100644
index 0000000..96a81f7
--- /dev/null
+++ b/gmp-6.3.0/mpz/tdiv_r_2exp.c
@@ -0,0 +1,76 @@
+/* mpz_tdiv_r_2exp -- Divide an integer by 2**CNT and produce a remainder.
+
+Copyright 1991, 1993-1995, 2001, 2002, 2012 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_tdiv_r_2exp (mpz_ptr res, mpz_srcptr in, mp_bitcnt_t cnt)
+{
+  mp_size_t in_size = ABSIZ (in);
+  mp_size_t res_size;
+  mp_size_t limb_cnt = cnt / GMP_NUMB_BITS;
+  mp_srcptr in_ptr = PTR (in);
+
+  if (in_size > limb_cnt)
+    {
+      /* The input operand is (probably) greater than 2**CNT.  */
+      mp_limb_t x;
+
+      x = in_ptr[limb_cnt] & (((mp_limb_t) 1 << cnt % GMP_NUMB_BITS) - 1);
+      if (x != 0)
+	{
+	  res_size = limb_cnt + 1;
+	  MPZ_REALLOC (res, res_size);
+
+	  PTR (res)[limb_cnt] = x;
+	}
+      else
+	{
+	  MPN_NORMALIZE (in_ptr, limb_cnt);
+
+	  MPZ_REALLOC (res, limb_cnt);
+
+	  res_size = limb_cnt;
+	}
+    }
+  else
+    {
+      /* The input operand is smaller than 2**CNT.  We perform a no-op,
+	 apart from that we might need to copy IN to RES.  */
+      limb_cnt = in_size;
+      MPZ_REALLOC (res, limb_cnt);
+
+      res_size = limb_cnt;
+    }
+
+  if (res != in)
+    MPN_COPY (PTR (res), PTR (in), limb_cnt);
+  SIZ (res) = SIZ (in) >= 0 ? res_size : -res_size;
+}
-- 
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