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HalfLimits.h
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34 
35 
36 // Primary authors:
37 // Florian Kainz <kainz@ilm.com>
38 // Rod Bogart <rgb@ilm.com>
39 
40 
41 #ifndef OPENVDB_MATH_HALF_LIMITS_HAS_BEEN_INCLUDED
42 #define OPENVDB_MATH_HALF_LIMITS_HAS_BEEN_INCLUDED
43 
44 
45 //------------------------------------------------------------------------
46 //
47 // C++ standard library-style numeric_limits for class half
48 //
49 //------------------------------------------------------------------------
50 
51 #include <limits>
52 #include "Half.h"
53 
54 namespace std {
55 
56 template <>
57 class numeric_limits <openvdb::OPENVDB_VERSION_NAME::math::half>
58 {
59  public:
60 
61  static const bool is_specialized = true;
62 
63  static half min () throw () {return HALF_NRM_MIN;}
64  static half max () throw () {return HALF_MAX;}
65 
66  static const int digits = HALF_MANT_DIG;
67  static const int digits10 = HALF_DIG;
68  static const bool is_signed = true;
69  static const bool is_integer = false;
70  static const bool is_exact = false;
71  static const int radix = HALF_RADIX;
72  static half epsilon () throw () {return HALF_EPSILON;}
73  static half round_error () throw () {return HALF_EPSILON / 2;}
74 
75  static const int min_exponent = HALF_MIN_EXP;
76  static const int min_exponent10 = HALF_MIN_10_EXP;
77  static const int max_exponent = HALF_MAX_EXP;
78  static const int max_exponent10 = HALF_MAX_10_EXP;
79 
80  static const bool has_infinity = true;
81  static const bool has_quiet_NaN = true;
82  static const bool has_signaling_NaN = true;
83  static const float_denorm_style has_denorm = denorm_present;
84  static const bool has_denorm_loss = false;
85  static half infinity () throw () {return half::posInf();}
86  static half quiet_NaN () throw () {return half::qNan();}
87  static half signaling_NaN () throw () {return half::sNan();}
88  static half denorm_min () throw () {return HALF_MIN;}
89 
90  static const bool is_iec559 = false;
91  static const bool is_bounded = false;
92  static const bool is_modulo = false;
93 
94  static const bool traps = true;
95  static const bool tinyness_before = false;
96  static const float_round_style round_style = round_to_nearest;
97 
98 #if __cplusplus >= 201103L
99 
100  // C++11 additions.
101  static constexpr int max_digits10 = HALF_DECIMAL_DIG;
102  static half lowest () {return -HALF_MAX;}
103 
104 #endif
105 
106 };
107 
108 
109 } // namespace std
110 
111 #endif // OPENVDB_MATH_HALF_LIMITS_HAS_BEEN_INCLUDED
constexpr auto digits10() FMT_NOEXCEPT-> int
Definition: format.h:988
#define HALF_DIG
Definition: half.h:233
imath_half_bits_t half
if we're in a C-only context, alias the half bits type to half
Definition: half.h:266
#define HALF_MAX
Largest positive half.
Definition: half.h:223
bool_constant< is_integral< T >::value &&!std::is_same< T, bool >::value &&!std::is_same< T, char >::value &&!std::is_same< T, wchar_t >::value > is_integer
Definition: format.h:2010
#define HALF_DECIMAL_DIG
Definition: half.h:238
#define HALF_MIN
Smallest positive normalized half.
Definition: half.h:221
std::integral_constant< bool, std::numeric_limits< T >::is_signed||std::is_same< T, int128_t >::value > is_signed
Definition: format.h:821
#define HALF_NRM_MIN
Smallest positive normalized half.
Definition: half.h:219
#define HALF_EPSILON
Smallest positive e for which half(1.0 + e) != half(1.0)
Definition: half.h:225
#define HALF_RADIX
Base of the exponent.
Definition: half.h:240
#define HALF_MAX_10_EXP
Definition: half.h:252
#define HALF_MANT_DIG
Number of digits in mantissa (significand + hidden leading 1)
Definition: half.h:229
#define HALF_MAX_EXP
Definition: half.h:246