mirror of
https://github.com/vale981/arb
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91 lines
2.3 KiB
C
91 lines
2.3 KiB
C
/*=============================================================================
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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
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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ARB is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with ARB; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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=============================================================================*/
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/******************************************************************************
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Copyright (C) 2012 Fredrik Johansson
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******************************************************************************/
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#include "fmpcb.h"
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void
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fmpcb_mul(fmpcb_t z, const fmpcb_t x, const fmpcb_t y, long prec)
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{
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#define a fmpcb_realref(x)
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#define b fmpcb_imagref(x)
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#define c fmpcb_realref(y)
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#define d fmpcb_imagref(y)
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#define e fmpcb_realref(z)
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#define f fmpcb_imagref(z)
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if (fmprb_is_zero(b))
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{
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fmprb_mul(f, d, a, prec);
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fmprb_mul(e, c, a, prec);
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}
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else if (fmprb_is_zero(d))
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{
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fmprb_mul(f, b, c, prec);
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fmprb_mul(e, a, c, prec);
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}
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else if (fmprb_is_zero(a))
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{
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fmprb_mul(e, c, b, prec);
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fmprb_mul(f, d, b, prec);
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fmpcb_mul_onei(z, z);
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}
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else if (fmprb_is_zero(c))
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{
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fmprb_mul(e, a, d, prec);
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fmprb_mul(f, b, d, prec);
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fmpcb_mul_onei(z, z);
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}
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else
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{
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fmprb_t t, u, v;
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fmprb_init(t);
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fmprb_init(u);
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fmprb_init(v);
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fmprb_add(t, a, b, prec);
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fmprb_add(u, c, d, prec);
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fmprb_mul(v, t, u, prec);
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fmprb_mul(t, a, c, prec);
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fmprb_mul(u, b, d, prec);
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fmprb_sub(e, t, u, prec);
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fmprb_sub(f, v, t, prec);
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fmprb_sub(f, f, u, prec);
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fmprb_clear(t);
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fmprb_clear(u);
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fmprb_clear(v);
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}
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#undef a
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#undef b
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#undef c
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#undef d
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#undef e
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#undef f
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}
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