+++ /dev/null
-/* mpz_kronecker_ui -- Kronecker/Jacobi symbol. */
-
-/*
-Copyright (C) 1999, 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"
-
-
-/* This function is expected to be often used with b an odd prime, so the
- code for odd b is nice and short. */
-
-int
-#if __STDC__
-mpz_kronecker_ui (mpz_srcptr a, unsigned long b)
-#else
-mpz_kronecker_ui (a, b)
- mpz_srcptr a;
- unsigned long b;
-#endif
-{
- int twos;
-
- if (b & 1)
- {
- if (b != 1)
- return mpn_jacobi_base (mpz_fdiv_ui (a, b), b, 0);
- else
- return 1; /* (a/1)=1 for any a */
- }
-
- if (b == 0)
- return JACOBI_Z0 (a);
-
- /* (a/2)=0 if a even */
- if (mpz_even_p (a))
- return 0;
-
- /* (a/2)=(2/a) when a odd */
- count_trailing_zeros (twos, b);
- b >>= twos;
- if (b == 1)
- return JACOBI_TWOS_U (twos, PTR(a)[0]);
-
- return mpn_jacobi_base (mpz_fdiv_ui (a, b), b,
- JACOBI_TWOS_U_BIT1(twos, PTR(a)[0]));
-}