49 lines
1.6 KiB
C
49 lines
1.6 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) 2009 William Hart
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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
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fmpz_abs(fmpz_t f1, const fmpz_t f2)
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{
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if (!COEFF_IS_MPZ(*f2)) /* coeff is small */
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{
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fmpz t = FLINT_ABS(*f2); /* Need to save value in case of aliasing */
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_fmpz_demote(f1);
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*f1 = t;
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}
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else /* coeff is large */
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{
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/* No need to retain value in promotion, as if aliased, both already large */
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__mpz_struct *mpz_ptr = _fmpz_promote(f1);
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mpz_abs(mpz_ptr, COEFF_TO_PTR(*f2));
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}
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}
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