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https://github.com/vale981/arb
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51 lines
1.6 KiB
C
51 lines
1.6 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) 2013 Fredrik Johansson
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******************************************************************************/
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#include "gamma.h"
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void
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gamma_rising_fmprb_ui_bsplit(fmprb_t y, const fmprb_t x, ulong n, long prec)
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{
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if (prec < 768 || n < 8)
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{
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gamma_rising_fmprb_ui_bsplit_simple(y, x, n, prec);
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}
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else if (prec < 1500 || n < 500000 / prec)
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{
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gamma_rising_fmprb_ui_bsplit_eight(y, x, n, prec);
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}
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else
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{
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ulong step, s1, s2;
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/* experimental fit */
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s1 = 2 * sqrt(n);
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s2 = 10 * pow(prec - 1200, 0.25);
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step = FLINT_MIN(s1, s2);
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gamma_rising_fmprb_ui_bsplit_rectangular(y, x, n, step, prec);
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}
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}
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