mirror of
https://github.com/vale981/arb
synced 2025-03-06 01:41:39 -05:00
64 lines
1.9 KiB
C
64 lines
1.9 KiB
C
/*=============================================================================
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This file is part of ARB.
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ARB 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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ARB 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 ARB; 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) 2014 Fredrik Johansson
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******************************************************************************/
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#include "arf.h"
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int
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arf_neg_round(arf_t y, const arf_t x, long prec, arf_rnd_t rnd)
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{
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if (arf_is_special(x))
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{
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arf_neg(y, x);
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return 0;
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}
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else
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{
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/* XXX: fixme */
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if (y == x)
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{
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int inexact;
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arf_t t;
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arf_init(t);
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arf_set(t, x);
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inexact = arf_neg_round(y, t, prec, rnd);
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arf_clear(t);
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return inexact;
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}
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else
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{
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mp_srcptr xptr;
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mp_size_t xn;
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int inexact;
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long fix;
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ARF_GET_MPN_READONLY(xptr, xn, x);
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inexact = _arf_set_round_mpn(y, &fix, xptr, xn,
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ARF_SGNBIT(x) ^ 1, prec, rnd);
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_fmpz_add_fast(ARF_EXPREF(y), ARF_EXPREF(x), fix);
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return inexact;
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}
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}
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}
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