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rounding.cpp
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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  * Last modified:
14  * $Date: 2013-02-04 17:54:05 +0100 (Mon, 04 Feb 2013) $ by $Author: schulte $
15  * $Revision: 13260 $
16  *
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41 
42 #include <gecode/float.hh>
43 
44 #ifdef GECODE_HAS_MPFR
45 
46 #include <gmp.h>
47 #include <mpfr.h>
48 
49 namespace Gecode { namespace Float {
50 
52  typedef int mpfr_func(mpfr_t, const __mpfr_struct*, mp_rnd_t);
53 
55  forceinline double
56  invoke_mpfr(FloatNum x, mpfr_func f, mp_rnd_t r) {
57  mpfr_t xx;
58  mpfr_init_set_d(xx, x, GMP_RNDN);
59  f(xx, xx, r);
60  FloatNum res = mpfr_get_d(xx, r);
61  mpfr_clear(xx);
62  return res;
63  }
64 
66 #define GECODE_GENR_FUNC(name) \
67  FloatNum Rounding::name##_down(FloatNum x) { \
68  return invoke_mpfr(x, mpfr_##name, GMP_RNDD); \
69  } \
70  FloatNum Rounding::name##_up(FloatNum x) { \
71  return invoke_mpfr(x, mpfr_##name, GMP_RNDU); \
72  }
87 
88 #undef GECODE_GENR_FUNC
89 
90 }}
91 
92 #endif
93 
94 // STATISTICS: float-var
95 
void log(Home home, FloatVar x0, FloatVar x1)
Post propagator for .
Definition: arithmetic.cpp:151
double invoke_mpfr(FloatNum x, mpfr_func f, mp_rnd_t r)
Routine to call mpfr function with proper rounding.
Definition: rounding.cpp:56
FloatVal sinh(const FloatVal &x)
Definition: val.hpp:464
NNF * r
Right subtree.
Definition: bool-expr.cpp:246
FloatVal cosh(const FloatVal &x)
Definition: val.hpp:468
void asin(Home home, FloatVar x0, FloatVar x1)
Post propagator for .
Definition: arithmetic.cpp:175
void cos(Home home, FloatVar x0, FloatVar x1)
Post propagator for .
Definition: arithmetic.cpp:196
Node * x
Pointer to corresponding Boolean expression node.
Definition: bool-expr.cpp:253
void tan(Home home, FloatVar x0, FloatVar x1)
Post propagator for .
Definition: arithmetic.cpp:210
FloatVal acosh(const FloatVal &x)
Definition: val.hpp:480
#define forceinline
Definition: config.hpp:132
FloatVal atanh(const FloatVal &x)
Definition: val.hpp:484
int mpfr_func(mpfr_t, const __mpfr_struct *, mp_rnd_t)
Type signatur of mpfr function.
Definition: rounding.cpp:52
FloatVal asinh(const FloatVal &x)
Definition: val.hpp:476
#define GECODE_GENR_FUNC(name)
Define mpfr functions with proper rounding.
Definition: rounding.cpp:66
Gecode toplevel namespace
void sin(Home home, FloatVar x0, FloatVar x1)
Post propagator for .
Definition: arithmetic.cpp:182
void acos(Home home, FloatVar x0, FloatVar x1)
Post propagator for .
Definition: arithmetic.cpp:189
void exp(Home home, FloatVar x0, FloatVar x1)
Post propagator for .
Definition: arithmetic.cpp:144
FloatVal tanh(const FloatVal &x)
Definition: val.hpp:472
double FloatNum
Floating point number base type.
Definition: float.hh:108
void atan(Home home, FloatVar x0, FloatVar x1)
Post propagator for .
Definition: arithmetic.cpp:203