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https://github.com/vale981/arb
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41 lines
1.1 KiB
C
41 lines
1.1 KiB
C
/*
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Copyright (C) 2016 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 "arb_poly.h"
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void
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_arb_poly_taylor_shift(arb_ptr poly, const arb_t c, slong n, slong prec)
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{
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if (n <= 30 || (n <= 500 && arb_bits(c) == 1 && n < 30 + 3 * sqrt(prec))
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|| (n <= 100 && arb_bits(c) < 0.01 * prec))
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{
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_arb_poly_taylor_shift_horner(poly, c, n, prec);
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}
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else if (prec > 2 * n)
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{
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_arb_poly_taylor_shift_convolution(poly, c, n, prec);
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}
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else
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{
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_arb_poly_taylor_shift_divconquer(poly, c, n, prec);
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}
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}
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void
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arb_poly_taylor_shift(arb_poly_t g, const arb_poly_t f,
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const arb_t c, slong prec)
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{
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if (f != g)
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arb_poly_set_round(g, f, prec);
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_arb_poly_taylor_shift(g->coeffs, c, g->length, prec);
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}
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