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https://github.com/vale981/arb
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30 lines
821 B
C
30 lines
821 B
C
/*
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Copyright (C) 2016 Pascal Molin
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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_dft.h"
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void
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acb_dft_convol_naive(acb_ptr w, acb_srcptr f, acb_srcptr g, slong len, slong prec)
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{
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slong x, y;
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for (x = 0; x < len; x ++)
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{
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acb_ptr wx;
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acb_srcptr fx;
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wx = w + x;
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fx = f + x;
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acb_zero(wx);
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for (y = 0; y <= x; y++)
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acb_addmul(wx, fx - y, g + y, prec);
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for (; y < len; y++)
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acb_addmul(wx, fx + (len - y), g + y, prec);
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}
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}
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