mirror of
https://github.com/vale981/arb
synced 2025-03-04 17:01:40 -05:00
50 lines
1.6 KiB
C
50 lines
1.6 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_precise(acb_t res, const acb_t initial, int subtract, acb_srcptr x, slong xstep,
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acb_srcptr y, slong ystep, slong len, slong prec)
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{
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arb_ptr tmp;
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slong i;
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tmp = flint_malloc(sizeof(arb_struct) * (4 * len));
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for (i = 0; i < len; i++)
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{
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tmp[0 * len + i] = *acb_realref(x + i * xstep);
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tmp[1 * len + i] = *acb_imagref(x + i * xstep);
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tmp[2 * len + i] = *acb_realref(y + i * ystep);
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arb_init(tmp + 3 * len + i);
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arb_neg(tmp + 3 * len + i, acb_imagref(y + i * ystep));
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}
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arb_dot_precise(acb_realref(res), initial == NULL ? NULL : acb_realref(initial), subtract,
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tmp, 1, tmp + 2 * len, 1, 2 * len, prec);
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for (i = 0; i < len; i++)
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arb_clear(tmp + 3 * len + i);
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for (i = 0; i < len; i++)
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{
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tmp[0 * len + i] = *acb_realref(x + i * xstep);
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tmp[1 * len + i] = *acb_imagref(x + i * xstep);
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tmp[2 * len + i] = *acb_imagref(y + i * ystep);
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tmp[3 * len + i] = *acb_realref(y + i * ystep);
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}
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arb_dot_precise(acb_imagref(res), initial == NULL ? NULL : acb_imagref(initial), subtract,
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tmp, 1, tmp + 2 * len, 1, 2 * len, prec);
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flint_free(tmp);
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}
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