1 /* mpfr_stack -- initialize a floating-point number with given allocation area
3 Copyright 2005, 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
4 Contributed by the Arenaire and Cacao 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 2.1 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.LIB. If not, write to
20 the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
21 MA 02110-1301, USA. */
23 #include "mpfr-impl.h"
25 #undef mpfr_custom_get_size
27 mpfr_custom_get_size (mp_prec_t prec
)
29 return (prec
+ BITS_PER_MP_LIMB
-1) / BITS_PER_MP_LIMB
* BYTES_PER_MP_LIMB
;
32 #undef mpfr_custom_init
34 mpfr_custom_init (void *mantissa
, mp_prec_t prec
)
39 #undef mpfr_custom_get_mantissa
41 mpfr_custom_get_mantissa (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
, mp_exp_t exp
,
63 mp_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
);