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ilmbase_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 PXR_HALF_LIMITS_H
42 #define PXR_HALF_LIMITS_H
43 
44 
45 //------------------------------------------------------------------------
46 //
47 // C++ standard library-style numeric_limits for class half
48 //
49 //------------------------------------------------------------------------
50 
51 #include <limits>
52 #include "pxr/base/gf/ilmbase_half.h"
53 
54 namespace std {
55 
56 template <>
57 class numeric_limits <PXR_NS::pxr_half::half>
58 {
59  private:
60  using half = PXR_NS::pxr_half::half;
61 
62  public:
63 
64  static const bool is_specialized = true;
65 
66  static half min () throw () {return HALF_NRM_MIN;}
67  static half max () throw () {return HALF_MAX;}
68 
69  static const int digits = HALF_MANT_DIG;
70  static const int digits10 = HALF_DIG;
71  static const bool is_signed = true;
72  static const bool is_integer = false;
73  static const bool is_exact = false;
74  static const int radix = HALF_RADIX;
75  static half epsilon () throw () {return HALF_EPSILON;}
76  static half round_error () throw () {return HALF_EPSILON / 2;}
77 
78  static const int min_exponent = HALF_MIN_EXP;
79  static const int min_exponent10 = HALF_MIN_10_EXP;
80  static const int max_exponent = HALF_MAX_EXP;
81  static const int max_exponent10 = HALF_MAX_10_EXP;
82 
83  static const bool has_infinity = true;
84  static const bool has_quiet_NaN = true;
85  static const bool has_signaling_NaN = true;
86  static const float_denorm_style has_denorm = denorm_present;
87  static const bool has_denorm_loss = false;
88  static half infinity () throw () {return half::posInf();}
89  static half quiet_NaN () throw () {return half::qNan();}
90  static half signaling_NaN () throw () {return half::sNan();}
91  static half denorm_min () throw () {return HALF_MIN;}
92 
93  static const bool is_iec559 = false;
94  static const bool is_bounded = false;
95  static const bool is_modulo = false;
96 
97  static const bool traps = true;
98  static const bool tinyness_before = false;
99  static const float_round_style round_style = round_to_nearest;
100 
101 #if __cplusplus >= 201103L
102 
103  // C++11 additions.
104  static constexpr int max_digits10 = HALF_DECIMAL_DIG;
105  static half lowest () {return -HALF_MAX;}
106 
107 #endif
108 
109 };
110 
111 
112 } // namespace std
113 
114 #endif