1 /* mpz_jacobi (op1, op2).
2 Contributed by Bennet Yee (bsy) at Carnegie-Mellon University
4 Copyright (C) 1991, 1996 Free Software Foundation, Inc.
6 This file is part of the GNU MP Library.
8 The GNU MP Library is free software; you can redistribute it and/or modify
9 it under the terms of the GNU Library General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or (at your
11 option) any later version.
13 The GNU MP Library is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
15 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public
16 License for more details.
18 You should have received a copy of the GNU Library General Public License
19 along with the GNU MP Library; see the file COPYING.LIB. If not, write to
20 the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
21 MA 02111-1307, USA. */
25 /* Precondition: both p and q are positive */
29 mpz_jacobi (mpz_srcptr pi, mpz_srcptr qi)
40 mpz_gcd (gcdval, pi, qi);
41 if (!mpz_cmp_ui (gcdval, 1L))
43 /* J(ab,cb) = J(ab,c)J(ab,b) = J(ab,c)J(0,b) = J(ab,c)*0 */
47 retval = mpz_legendre (pi, qi);
51 return mpz_legendre (pi, qi);