Initial commit.

1 files changed, 92 insertions, 0 deletions

diff --git a/gmp-6.3.0/mpz/gcd_ui.c b/gmp-6.3.0/mpz/gcd_ui.c
new file mode 100644
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--- /dev/null
+++ b/gmp-6.3.0/mpz/gcd_ui.c
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+/* mpz_gcd_ui -- Calculate the greatest common divisor of two integers.
+
+Copyright 1994, 1996, 1999-2004, 2015, 2022 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 <stdio.h> /* for NULL */
+#include "gmp-impl.h"
+
+unsigned long int
+mpz_gcd_ui (mpz_ptr w, mpz_srcptr u, unsigned long int v)
+{
+  mp_size_t un;
+  mp_limb_t res;
+
+#if BITS_PER_ULONG > GMP_NUMB_BITS  /* avoid warnings about shift amount */
+  if (v > GMP_NUMB_MAX)
+    {
+      mpz_t vz, lw;
+      mp_limb_t vlimbs[2], wlimbs[2];
+
+      if (w == NULL)
+	{
+	  PTR(lw) = wlimbs;
+	  ALLOC(lw) = 2;
+	  SIZ(lw) = 0;
+	  w = lw;
+	}
+      vlimbs[0] = v & GMP_NUMB_MASK;
+      vlimbs[1] = v >> GMP_NUMB_BITS;
+      PTR(vz) = vlimbs;
+      SIZ(vz) = 2;
+      mpz_gcd (w, u, vz);
+      /* because v!=0 we will have w<=v hence fitting a ulong */
+      ASSERT (mpz_fits_ulong_p (w));
+      return mpz_get_ui (w);
+    }
+#endif
+
+  un = ABSIZ(u);
+
+  if (un == 0)
+    res = v;
+  else if (v == 0)
+    {
+      if (w != NULL)
+	{
+	  if (u != w)
+	    {
+	      MPZ_NEWALLOC (w, un);
+	      MPN_COPY (PTR(w), PTR(u), un);
+	    }
+	  SIZ(w) = un;
+	}
+      /* Return u if it fits a ulong, otherwise 0. */
+      res = PTR(u)[0];
+      return (un == 1 && res <= ULONG_MAX ? res : 0);
+    }
+  else
+    res = mpn_gcd_1 (PTR(u), un, (mp_limb_t) v);
+
+  if (w != NULL)
+    {
+      MPZ_NEWALLOC (w, 1)[0] = res;
+      SIZ(w) = res != 0;
+    }
+  return res;
+}