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https://github.com/vale981/arb
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31 lines
741 B
C
31 lines
741 B
C
/*
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Copyright (C) 2014 Fredrik Johansson
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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 it under
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the terms of the GNU Lesser General Public License (LGPL) as published
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by the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version. See <http://www.gnu.org/licenses/>.
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*/
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#include "fmpz_extras.h"
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slong
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_fmpz_sub_small_large(const fmpz_t x, const fmpz_t y)
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{
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fmpz_t t;
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fmpz_init(t);
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fmpz_sub(t, x, y);
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if (!COEFF_IS_MPZ(*t))
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{
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/* no need to free t */
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return *t;
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}
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else
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{
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int sign = fmpz_sgn(t);
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fmpz_clear(t);
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return (sign > 0) ? WORD_MAX : -WORD_MAX;
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}
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}
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