1 /* mpfr_stack -- initialize a floating-point number with given allocation area
3 Copyright 2005, 2006, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
4 Contributed by the Arenaire and Caramel projects, INRIA.
6 This file is part of the GNU MPFR Library.
8 The GNU MPFR Library is free software; you can redistribute it and/or modify
9 it under the terms of the GNU Lesser General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or (at your
11 option) any later version.
13 The GNU MPFR Library is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
15 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
16 License for more details.
18 You should have received a copy of the GNU Lesser General Public License
19 along with the GNU MPFR Library; see the file COPYING.LESSER. If not, see
20 http://www.gnu.org/licenses/ or write to the Free Software Foundation, Inc.,
21 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. */
23 #include "mpfr-impl.h"
25 #undef mpfr_custom_get_size
27 mpfr_custom_get_size (mpfr_prec_t prec)
29 return (prec + GMP_NUMB_BITS -1) / GMP_NUMB_BITS * BYTES_PER_MP_LIMB;
32 #undef mpfr_custom_init
34 mpfr_custom_init (void *mantissa, mpfr_prec_t prec)
39 #undef mpfr_custom_get_significand
41 mpfr_custom_get_significand (mpfr_srcptr x)
43 return (void*) MPFR_MANT (x);
46 #undef mpfr_custom_get_exp
48 mpfr_custom_get_exp (mpfr_srcptr x)
53 #undef mpfr_custom_move
55 mpfr_custom_move (mpfr_ptr x, void *new_position)
57 MPFR_MANT (x) = (mp_limb_t *) new_position;
60 #undef mpfr_custom_init_set
62 mpfr_custom_init_set (mpfr_ptr x, int kind, mpfr_exp_t exp,
63 mpfr_prec_t prec, void *mantissa)
71 t = (mpfr_kind_t) kind;
76 t = (mpfr_kind_t) -kind;
79 MPFR_ASSERTD (t <= MPFR_REGULAR_KIND);
80 e = MPFR_LIKELY (t == MPFR_REGULAR_KIND) ? exp :
81 MPFR_UNLIKELY (t == MPFR_NAN_KIND) ? MPFR_EXP_NAN :
82 MPFR_UNLIKELY (t == MPFR_INF_KIND) ? MPFR_EXP_INF : MPFR_EXP_ZERO;
87 MPFR_MANT (x) = (mp_limb_t*) mantissa;
91 #undef mpfr_custom_get_kind
93 mpfr_custom_get_kind (mpfr_srcptr x)
95 if (MPFR_LIKELY (!MPFR_IS_SINGULAR (x)))
96 return (int) MPFR_REGULAR_KIND * MPFR_INT_SIGN (x);
98 return (int) MPFR_INF_KIND * MPFR_INT_SIGN (x);
100 return (int) MPFR_NAN_KIND;
101 MPFR_ASSERTD (MPFR_IS_ZERO (x));
102 return (int) MPFR_ZERO_KIND * MPFR_INT_SIGN (x);