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/* double mpf_get_d_2exp (signed long int *exp, mpf_t src).
Copyright 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
This file is part of the GNU MP Library.
The GNU MP Library is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 3 of the License, or (at your
option) any later version.
The GNU MP Library 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 Lesser General Public
License for more details.
You should have received a copy of the GNU Lesser General Public License
along with the GNU MP Library. If not, see http://www.gnu.org/licenses/. */
#include "gmp.h"
#include "gmp-impl.h"
#include "longlong.h"
double
mpf_get_d_2exp (signed long int *exp2, mpf_srcptr src)
{
mp_size_t size, abs_size;
mp_srcptr ptr;
int cnt;
long exp;
size = SIZ(src);
if (UNLIKELY (size == 0))
{
*exp2 = 0;
return 0.0;
}
ptr = PTR(src);
abs_size = ABS (size);
count_leading_zeros (cnt, ptr[abs_size - 1]);
cnt -= GMP_NAIL_BITS;
exp = EXP(src) * GMP_NUMB_BITS - cnt;
*exp2 = exp;
return mpn_get_d (ptr, abs_size, (mp_size_t) 0,
(long) - (abs_size * GMP_NUMB_BITS - cnt));
}
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