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/* mpfr_stack -- initialize a floating-point number with given allocation area
Copyright 2005-2020 Free Software Foundation, Inc.
Contributed by the AriC and Caramba projects, INRIA.
This file is part of the GNU MPFR Library.
The GNU MPFR 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 MPFR 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 MPFR Library; see the file COPYING.LESSER. If not, see
https://www.gnu.org/licenses/ or write to the Free Software Foundation, Inc.,
51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. */
#include "mpfr-impl.h"
#undef mpfr_custom_get_size
size_t
mpfr_custom_get_size (mpfr_prec_t prec)
{
return MPFR_PREC2LIMBS (prec) * MPFR_BYTES_PER_MP_LIMB;
}
#undef mpfr_custom_init
void
mpfr_custom_init (void *mantissa, mpfr_prec_t prec)
{
return ;
}
#undef mpfr_custom_get_significand
void *
mpfr_custom_get_significand (mpfr_srcptr x)
{
return (void*) MPFR_MANT (x);
}
#undef mpfr_custom_get_exp
mpfr_exp_t
mpfr_custom_get_exp (mpfr_srcptr x)
{
return MPFR_EXP (x);
}
#undef mpfr_custom_move
void
mpfr_custom_move (mpfr_ptr x, void *new_position)
{
MPFR_MANT (x) = (mp_limb_t *) new_position;
}
#undef mpfr_custom_init_set
void
mpfr_custom_init_set (mpfr_ptr x, int kind, mpfr_exp_t exp,
mpfr_prec_t prec, void *mantissa)
{
mpfr_kind_t t;
int s;
mpfr_exp_t e;
if (kind >= 0)
{
t = (mpfr_kind_t) kind;
s = MPFR_SIGN_POS;
}
else
{
t = (mpfr_kind_t) -kind;
s = MPFR_SIGN_NEG;
}
MPFR_ASSERTD (t <= MPFR_REGULAR_KIND);
e = MPFR_LIKELY (t == MPFR_REGULAR_KIND) ? exp :
MPFR_UNLIKELY (t == MPFR_NAN_KIND) ? MPFR_EXP_NAN :
MPFR_UNLIKELY (t == MPFR_INF_KIND) ? MPFR_EXP_INF : MPFR_EXP_ZERO;
MPFR_PREC (x) = prec;
MPFR_SET_SIGN (x, s);
MPFR_EXP (x) = e;
MPFR_MANT (x) = (mp_limb_t*) mantissa;
return;
}
#undef mpfr_custom_get_kind
int
mpfr_custom_get_kind (mpfr_srcptr x)
{
if (MPFR_LIKELY (!MPFR_IS_SINGULAR (x)))
return (int) MPFR_REGULAR_KIND * MPFR_INT_SIGN (x);
if (MPFR_IS_INF (x))
return (int) MPFR_INF_KIND * MPFR_INT_SIGN (x);
if (MPFR_IS_NAN (x))
return (int) MPFR_NAN_KIND;
MPFR_ASSERTD (MPFR_IS_ZERO (x));
return (int) MPFR_ZERO_KIND * MPFR_INT_SIGN (x);
}
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