mirror of
https://github.com/vale981/arb
synced 2025-03-05 17:31:38 -05:00
81 lines
1.9 KiB
C
81 lines
1.9 KiB
C
/*
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Copyright (C) 2014 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 "arf.h"
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int
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arf_mul_rnd_any(arf_ptr z, arf_srcptr x, arf_srcptr y,
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slong prec, arf_rnd_t rnd)
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{
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mp_size_t xn, yn;
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slong fix;
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int sgnbit, inexact;
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xn = ARF_XSIZE(x);
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yn = ARF_XSIZE(y);
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sgnbit = (xn ^ yn) & 1;
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xn >>= 1;
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yn >>= 1;
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if (yn > xn)
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{
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arf_srcptr __t; mp_size_t __u;
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__t = x; x = y; y = __t;
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__u = xn; xn = yn; yn = __u;
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}
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/* Either operand is a special value. */
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if (yn == 0)
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{
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arf_mul_special(z, x, y);
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return 0;
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}
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else
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{
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mp_size_t zn, alloc;
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mp_srcptr xptr, yptr;
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mp_ptr tmp;
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ARF_MUL_TMP_DECL
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ARF_GET_MPN_READONLY(xptr, xn, x);
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ARF_GET_MPN_READONLY(yptr, yn, y);
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alloc = zn = xn + yn;
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ARF_MUL_TMP_ALLOC(tmp, alloc)
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if (yn == 1)
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{
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tmp[zn - 1] = mpn_mul_1(tmp, xptr, xn, yptr[0]);
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}
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else if (ARF_USE_FFT_MUL(yn))
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{
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flint_mpn_mul_fft_main(tmp, xptr, xn, yptr, yn);
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}
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else if (xn == yn)
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{
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if (xptr == yptr)
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mpn_sqr(tmp, xptr, xn);
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else
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mpn_mul_n(tmp, xptr, yptr, yn);
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}
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else
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{
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mpn_mul(tmp, xptr, xn, yptr, yn);
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}
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inexact = _arf_set_round_mpn(z, &fix, tmp, zn, sgnbit, prec, rnd);
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_fmpz_add2_fast(ARF_EXPREF(z), ARF_EXPREF(x), ARF_EXPREF(y), fix);
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ARF_MUL_TMP_FREE(tmp, alloc)
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return inexact;
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}
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}
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