mirror of
https://github.com/vale981/arb
synced 2025-03-05 09:21:38 -05:00
80 lines
2.1 KiB
C
80 lines
2.1 KiB
C
/*=============================================================================
|
|
|
|
This file is part of ARB.
|
|
|
|
ARB is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2 of the License, or
|
|
(at your option) any later version.
|
|
|
|
ARB is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with ARB; if not, write to the Free Software
|
|
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
|
|
=============================================================================*/
|
|
/******************************************************************************
|
|
|
|
Copyright (C) 2012 Fredrik Johansson
|
|
|
|
******************************************************************************/
|
|
|
|
#include "fmpr.h"
|
|
|
|
long
|
|
fmpr_log(fmpr_t y, const fmpr_t x, slong prec, fmpr_rnd_t rnd)
|
|
{
|
|
if (fmpr_is_special(x))
|
|
{
|
|
if (fmpr_is_zero(x))
|
|
fmpr_neg_inf(y);
|
|
else if (fmpr_is_pos_inf(x))
|
|
fmpr_pos_inf(y);
|
|
else
|
|
fmpr_nan(y);
|
|
|
|
return FMPR_RESULT_EXACT;
|
|
}
|
|
else if (fmpr_sgn(x) < 0)
|
|
{
|
|
fmpr_nan(y);
|
|
return FMPR_RESULT_EXACT;
|
|
}
|
|
else if (fmpr_is_one(x))
|
|
{
|
|
fmpr_zero(y);
|
|
return FMPR_RESULT_EXACT;
|
|
}
|
|
else
|
|
{
|
|
slong r;
|
|
CALL_MPFR_FUNC(r, mpfr_log, y, x, prec, rnd);
|
|
return r;
|
|
}
|
|
}
|
|
|
|
long
|
|
fmpr_log1p(fmpr_t y, const fmpr_t x, slong prec, fmpr_rnd_t rnd)
|
|
{
|
|
if (fmpr_is_special(x))
|
|
{
|
|
if (fmpr_is_zero(x))
|
|
fmpr_zero(y);
|
|
else if (fmpr_is_pos_inf(x))
|
|
fmpr_pos_inf(y);
|
|
else
|
|
fmpr_nan(y);
|
|
|
|
return FMPR_RESULT_EXACT;
|
|
}
|
|
else
|
|
{
|
|
slong r;
|
|
CALL_MPFR_FUNC(r, mpfr_log1p, y, x, prec, rnd);
|
|
return r;
|
|
}
|
|
}
|