mirror of
https://github.com/vale981/arb
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47 lines
1.1 KiB
C
47 lines
1.1 KiB
C
/*
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Copyright (C) 2018 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.h"
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void
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acb_dot_simple(acb_t res, const acb_t initial, int subtract,
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acb_srcptr x, slong xstep, acb_srcptr y, slong ystep, slong len, slong prec)
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{
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slong i;
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if (len <= 0)
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{
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if (initial == NULL)
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acb_zero(res);
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else
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acb_set_round(res, initial, prec);
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return;
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}
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if (initial == NULL)
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{
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acb_mul(res, x, y, prec);
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}
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else
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{
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if (subtract)
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acb_neg(res, initial);
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else
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acb_set(res, initial);
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acb_addmul(res, x, y, prec);
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}
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for (i = 1; i < len; i++)
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acb_addmul(res, x + i * xstep, y + i * ystep, prec);
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if (subtract)
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acb_neg(res, res);
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}
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