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https://github.com/vale981/arb
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40 lines
1.1 KiB
C
40 lines
1.1 KiB
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_dft_precomp(acb_ptr w, acb_srcptr f, acb_srcptr g, const acb_dft_pre_t pre, slong prec)
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{
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acb_ptr fp, gp;
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fp = _acb_vec_init(pre->n);
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gp = _acb_vec_init(pre->n);
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acb_dft_precomp(fp, f, pre, prec);
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acb_dft_precomp(gp, g, pre, prec);
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_acb_vec_kronecker_mul(gp, gp, fp, pre->n, prec);
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acb_dft_inverse_precomp(w, gp, pre, prec);
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_acb_vec_clear(fp, pre->n);
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_acb_vec_clear(gp, pre->n);
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}
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void
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acb_dft_convol_dft(acb_ptr w, acb_srcptr f, acb_srcptr g, slong len, slong prec)
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{
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acb_dft_pre_t pre;
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acb_dft_precomp_init(pre, len, prec);
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acb_dft_convol_dft_precomp(w, f, g, pre, prec);
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acb_dft_precomp_clear(pre);
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}
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