Generated on Fri Jan 10 2020 11:38:25 for Gecode by doxygen 1.8.16
rounding.cpp
Go to the documentation of this file.
1 /* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
2 /*
3  * Main authors:
4  * Vincent Barichard <Vincent.Barichard@univ-angers.fr>
5  *
6  * Contributing authors:
7  * Christian Schulte <schulte@gecode.org>
8  *
9  * Copyright:
10  * Christian Schulte, 2012
11  * Vincent Barichard, 2012
12  *
13  * This file is part of Gecode, the generic constraint
14  * development environment:
15  * http://www.gecode.org
16  *
17  * Permission is hereby granted, free of charge, to any person obtaining
18  * a copy of this software and associated documentation files (the
19  * "Software"), to deal in the Software without restriction, including
20  * without limitation the rights to use, copy, modify, merge, publish,
21  * distribute, sublicense, and/or sell copies of the Software, and to
22  * permit persons to whom the Software is furnished to do so, subject to
23  * the following conditions:
24  *
25  * The above copyright notice and this permission notice shall be
26  * included in all copies or substantial portions of the Software.
27  *
28  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
29  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
30  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
31  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
32  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
33  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
34  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
35  *
36  */
37 
38 #include <gecode/float.hh>
39 
40 #ifdef GECODE_HAS_MPFR
41 
42 #include <gmp.h>
43 #include <mpfr.h>
44 
45 namespace Gecode { namespace Float {
46 
48  typedef int mpfr_func(mpfr_t, const __mpfr_struct*, mp_rnd_t);
49 
51  forceinline double
53  mpfr_t xx;
54  mpfr_init_set_d(xx, x, GMP_RNDN);
55  f(xx, xx, r);
56  FloatNum res = mpfr_get_d(xx, r);
57  mpfr_clear(xx);
58  return res;
59  }
60 
62 #define GECODE_GENR_FUNC(name) \
63  FloatNum Rounding::name##_down(FloatNum x) { \
64  return invoke_mpfr(x, mpfr_##name, GMP_RNDD); \
65  } \
66  FloatNum Rounding::name##_up(FloatNum x) { \
67  return invoke_mpfr(x, mpfr_##name, GMP_RNDU); \
68  }
83 
84 #undef GECODE_GENR_FUNC
85 
86 }}
87 
88 #endif
89 
90 // STATISTICS: float-var
91 
Post propagator for SetVar x
Definition: set.hh:767
void log(Home home, FloatVar x0, FloatVar x1)
Post propagator for .
FloatVal tanh(const FloatVal &x)
Definition: val.hpp:468
FloatVal acosh(const FloatVal &x)
Definition: val.hpp:476
void sin(Home home, FloatVar x0, FloatVar x1)
Post propagator for .
FloatVal asinh(const FloatVal &x)
Definition: val.hpp:472
void acos(Home home, FloatVar x0, FloatVar x1)
Post propagator for .
Gecode toplevel namespace
Post propagator for SetVar SetOpType SetVar SetRelType r
Definition: set.hh:767
double FloatNum
Floating point number base type.
Definition: float.hh:106
void tan(Home home, FloatVar x0, FloatVar x1)
Post propagator for .
FloatVal sinh(const FloatVal &x)
Definition: val.hpp:460
FloatVal atanh(const FloatVal &x)
Definition: val.hpp:480
int mpfr_func(mpfr_t, const __mpfr_struct *, mp_rnd_t)
Type signatur of mpfr function.
Definition: rounding.cpp:48
#define GECODE_GENR_FUNC(name)
Define mpfr functions with proper rounding.
Definition: rounding.cpp:62
void asin(Home home, FloatVar x0, FloatVar x1)
Post propagator for .
#define forceinline
Definition: config.hpp:185
FloatVal cosh(const FloatVal &x)
Definition: val.hpp:464
void atan(Home home, FloatVar x0, FloatVar x1)
Post propagator for .
Post propagator for f(x \diamond_{\mathit{op}} y) \sim_r z \f$ void rel(Home home
void exp(Home home, FloatVar x0, FloatVar x1)
Post propagator for .
void cos(Home home, FloatVar x0, FloatVar x1)
Post propagator for .
double invoke_mpfr(FloatNum x, mpfr_func f, mp_rnd_t r)
Routine to call mpfr function with proper rounding.
Definition: rounding.cpp:52