+++ /dev/null
-/* mpn_gcd_1 --
-
-Copyright (C) 1994, 1996, 2000 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 the GNU Lesser General Public License as published by
-the Free Software Foundation; either version 2.1 of the License, or (at your
-option) any later version.
-
-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 Lesser General Public
-License for more details.
-
-You should have received a copy of the GNU Lesser General Public License
-along with the GNU MP Library; see the file COPYING.LIB. If not, write to
-the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
-MA 02111-1307, USA. */
-
-#include "gmp.h"
-#include "gmp-impl.h"
-#include "longlong.h"
-
-/* Does not work for U == 0 or V == 0. It would be tough to make it work for
- V == 0 since gcd(x,0) = x, and U does not generally fit in an mp_limb_t. */
-
-mp_limb_t
-#if __STDC__
-mpn_gcd_1 (mp_srcptr up, mp_size_t size, mp_limb_t vlimb)
-#else
-mpn_gcd_1 (up, size, vlimb)
- mp_srcptr up;
- mp_size_t size;
- mp_limb_t vlimb;
-#endif
-{
- mp_limb_t ulimb;
- unsigned long int u_low_zero_bits, v_low_zero_bits;
-
- if (size > 1)
- {
- ulimb = mpn_mod_1 (up, size, vlimb);
- if (ulimb == 0)
- return vlimb;
- }
- else
- ulimb = up[0];
-
- /* Need to eliminate low zero bits. */
- count_trailing_zeros (u_low_zero_bits, ulimb);
- ulimb >>= u_low_zero_bits;
-
- count_trailing_zeros (v_low_zero_bits, vlimb);
- vlimb >>= v_low_zero_bits;
-
- while (ulimb != vlimb)
- {
- if (ulimb > vlimb)
- {
- ulimb -= vlimb;
- do
- ulimb >>= 1;
- while ((ulimb & 1) == 0);
- }
- else /* vlimb > ulimb. */
- {
- vlimb -= ulimb;
- do
- vlimb >>= 1;
- while ((vlimb & 1) == 0);
- }
- }
-
- return ulimb << MIN (u_low_zero_bits, v_low_zero_bits);
-}