71 lines
2.4 KiB
C
71 lines
2.4 KiB
C
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/*=============================================================================
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This file is part of FLINT.
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FLINT is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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FLINT is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with FLINT; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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=============================================================================*/
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/******************************************************************************
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Copyright (C) 2012 Thomas M. DuBuisson
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******************************************************************************/
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#include <gmp.h>
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#include "flint.h"
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#include "ulong_extras.h"
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#include "fmpz.h"
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void fmpz_xor(fmpz_t f, const fmpz_t g, const fmpz_t h)
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{
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fmpz c1,c2;
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c1 = *g;
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c2 = *h;
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if(!COEFF_IS_MPZ(c1))
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{
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if(!COEFF_IS_MPZ(c2)) /* both inputs are small */
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{
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fmpz_set_si(f, c1 ^ c2);
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} else /* g is small, h is large */
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{
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mpz_t tmp;
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__mpz_struct * mpz3 = _fmpz_promote(f);
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flint_mpz_init_set_si(tmp, c1);
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mpz_xor(mpz3, COEFF_TO_PTR(c2), tmp);
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_fmpz_demote_val(f);
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mpz_clear(tmp);
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}
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} else
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{
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if(!COEFF_IS_MPZ(c2)) /* g is large, h is small */
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{
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mpz_t tmp;
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__mpz_struct *mpz3 = _fmpz_promote(f);
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flint_mpz_init_set_si(tmp, c2);
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mpz_xor(mpz3, COEFF_TO_PTR(c1), tmp);
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_fmpz_demote_val(f);
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mpz_clear(tmp);
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} else /* g and h are large */
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{
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__mpz_struct * mpz3 = _fmpz_promote(f);
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__mpz_struct * mpz1 = COEFF_TO_PTR(c1);
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__mpz_struct * mpz2 = COEFF_TO_PTR(c2);
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mpz_xor(mpz3, mpz1, mpz2);
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_fmpz_demote_val(f);
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}
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}
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}
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