mirror of
https://github.com/vale981/arb
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44 lines
1.2 KiB
C
44 lines
1.2 KiB
C
/*
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Copyright (C) 2012 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 "acb_poly.h"
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void
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_acb_poly_sub(acb_ptr res, acb_srcptr poly1, slong len1,
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acb_srcptr poly2, slong len2, slong prec)
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{
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slong i, min = FLINT_MIN(len1, len2);
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for (i = 0; i < min; i++)
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acb_sub(res + i, poly1 + i, poly2 + i, prec);
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for (i = min; i < len1; i++)
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acb_set_round(res + i, poly1 + i, prec);
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for (i = min; i < len2; i++)
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acb_neg_round(res + i, poly2 + i, prec);
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}
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void
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acb_poly_sub(acb_poly_t res, const acb_poly_t poly1,
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const acb_poly_t poly2, slong prec)
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{
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slong max = FLINT_MAX(poly1->length, poly2->length);
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acb_poly_fit_length(res, max);
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_acb_poly_sub(res->coeffs, poly1->coeffs, poly1->length, poly2->coeffs,
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poly2->length, prec);
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_acb_poly_set_length(res, max);
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_acb_poly_normalise(res);
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}
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