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Kokkos_NumericTraits.hpp
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43 
44 #ifndef KOKKOS_NUMERICTRAITS_HPP
45 #define KOKKOS_NUMERICTRAITS_HPP
46 
47 #include<climits>
48 #include<cfloat>
49 
50 namespace Kokkos {
51 
52 template<class T>
53 struct reduction_identity; /*{
54  KOKKOS_FORCEINLINE_FUNCTION constexpr static T sum() { return T(); } // 0
55  KOKKOS_FORCEINLINE_FUNCTION constexpr static T prod() // 1
56  { static_assert( false, "Missing specialization of Kokkos::reduction_identity for custom prod reduction type"); return T(); }
57  KOKKOS_FORCEINLINE_FUNCTION constexpr static T max() // minimum value
58  { static_assert( false, "Missing specialization of Kokkos::reduction_identity for custom max reduction type"); return T(); }
59  KOKKOS_FORCEINLINE_FUNCTION constexpr static T min() // maximum value
60  { static_assert( false, "Missing specialization of Kokkos::reduction_identity for custom min reduction type"); return T(); }
61  KOKKOS_FORCEINLINE_FUNCTION constexpr static T bor() // 0, only for integer type
62  { static_assert( false, "Missing specialization of Kokkos::reduction_identity for custom bor reduction type"); return T(); }
63  KOKKOS_FORCEINLINE_FUNCTION constexpr static T band() // !0, only for integer type
64  { static_assert( false, "Missing specialization of Kokkos::reduction_identity for custom band reduction type"); return T(); }
65  KOKKOS_FORCEINLINE_FUNCTION constexpr static T lor() // 0, only for integer type
66  { static_assert( false, "Missing specialization of Kokkos::reduction_identity for custom lor reduction type"); return T(); }
67  KOKKOS_FORCEINLINE_FUNCTION constexpr static T land() // !0, only for integer type
68  { static_assert( false, "Missing specialization of Kokkos::reduction_identity for custom land reduction type"); return T(); }
69 };*/
70 
71 template<>
72 struct reduction_identity<signed char> {
73  KOKKOS_FORCEINLINE_FUNCTION constexpr static signed char sum() {return static_cast<signed char>(0);}
74  KOKKOS_FORCEINLINE_FUNCTION constexpr static signed char prod() {return static_cast<signed char>(1);}
75  KOKKOS_FORCEINLINE_FUNCTION constexpr static signed char max() {return SCHAR_MIN;}
76  KOKKOS_FORCEINLINE_FUNCTION constexpr static signed char min() {return SCHAR_MAX;}
77  KOKKOS_FORCEINLINE_FUNCTION constexpr static signed char bor() {return static_cast<signed char>(0x0);}
78  KOKKOS_FORCEINLINE_FUNCTION constexpr static signed char band() {return ~static_cast<signed char>(0x0);}
79  KOKKOS_FORCEINLINE_FUNCTION constexpr static signed char lor() {return static_cast<signed char>(0);}
80  KOKKOS_FORCEINLINE_FUNCTION constexpr static signed char land() {return static_cast<signed char>(1);}
81 };
82 
83 template<>
84 struct reduction_identity<short> {
85  KOKKOS_FORCEINLINE_FUNCTION constexpr static short sum() {return static_cast<short>(0);}
86  KOKKOS_FORCEINLINE_FUNCTION constexpr static short prod() {return static_cast<short>(1);}
87  KOKKOS_FORCEINLINE_FUNCTION constexpr static short max() {return SHRT_MIN;}
88  KOKKOS_FORCEINLINE_FUNCTION constexpr static short min() {return SHRT_MAX;}
89  KOKKOS_FORCEINLINE_FUNCTION constexpr static short bor() {return static_cast<short>(0x0);}
90  KOKKOS_FORCEINLINE_FUNCTION constexpr static short band() {return ~static_cast<short>(0x0);}
91  KOKKOS_FORCEINLINE_FUNCTION constexpr static short lor() {return static_cast<short>(0);}
92  KOKKOS_FORCEINLINE_FUNCTION constexpr static short land() {return static_cast<short>(1);}
93 };
94 
95 template<>
96 struct reduction_identity<int> {
97  KOKKOS_FORCEINLINE_FUNCTION constexpr static int sum() {return static_cast<int>(0);}
98  KOKKOS_FORCEINLINE_FUNCTION constexpr static int prod() {return static_cast<int>(1);}
99  KOKKOS_FORCEINLINE_FUNCTION constexpr static int max() {return INT_MIN;}
100  KOKKOS_FORCEINLINE_FUNCTION constexpr static int min() {return INT_MAX;}
101  KOKKOS_FORCEINLINE_FUNCTION constexpr static int bor() {return static_cast<int>(0x0);}
102  KOKKOS_FORCEINLINE_FUNCTION constexpr static int band() {return ~static_cast<int>(0x0);}
103  KOKKOS_FORCEINLINE_FUNCTION constexpr static int lor() {return static_cast<int>(0);}
104  KOKKOS_FORCEINLINE_FUNCTION constexpr static int land() {return static_cast<int>(1);}
105 };
106 
107 template<>
108 struct reduction_identity<long> {
109  KOKKOS_FORCEINLINE_FUNCTION constexpr static long sum() {return static_cast<long>(0);}
110  KOKKOS_FORCEINLINE_FUNCTION constexpr static long prod() {return static_cast<long>(1);}
111  KOKKOS_FORCEINLINE_FUNCTION constexpr static long max() {return LLONG_MIN;}
112  KOKKOS_FORCEINLINE_FUNCTION constexpr static long min() {return LLONG_MAX;}
113  KOKKOS_FORCEINLINE_FUNCTION constexpr static long bor() {return static_cast<long>(0x0);}
114  KOKKOS_FORCEINLINE_FUNCTION constexpr static long band() {return ~static_cast<long>(0x0);}
115  KOKKOS_FORCEINLINE_FUNCTION constexpr static long lor() {return static_cast<long>(0);}
116  KOKKOS_FORCEINLINE_FUNCTION constexpr static long land() {return static_cast<long>(1);}
117 };
118 
119 template<>
120 struct reduction_identity<long long> {
121  KOKKOS_FORCEINLINE_FUNCTION constexpr static long long sum() {return static_cast<long long>(0);}
122  KOKKOS_FORCEINLINE_FUNCTION constexpr static long long prod() {return static_cast<long long>(1);}
123  KOKKOS_FORCEINLINE_FUNCTION constexpr static long long max() {return LLONG_MIN;}
124  KOKKOS_FORCEINLINE_FUNCTION constexpr static long long min() {return LLONG_MAX;}
125  KOKKOS_FORCEINLINE_FUNCTION constexpr static long long bor() {return static_cast<long long>(0x0);}
126  KOKKOS_FORCEINLINE_FUNCTION constexpr static long long band() {return ~static_cast<long long>(0x0);}
127  KOKKOS_FORCEINLINE_FUNCTION constexpr static long long lor() {return static_cast<long long>(0);}
128  KOKKOS_FORCEINLINE_FUNCTION constexpr static long long land() {return static_cast<long long>(1);}
129 };
130 
131 template<>
132 struct reduction_identity<unsigned char> {
133  KOKKOS_FORCEINLINE_FUNCTION constexpr static unsigned char sum() {return static_cast<unsigned char>(0);}
134  KOKKOS_FORCEINLINE_FUNCTION constexpr static unsigned char prod() {return static_cast<unsigned char>(1);}
135  KOKKOS_FORCEINLINE_FUNCTION constexpr static unsigned char max() {return static_cast<unsigned char>(0);}
136  KOKKOS_FORCEINLINE_FUNCTION constexpr static unsigned char min() {return UCHAR_MAX;}
137  KOKKOS_FORCEINLINE_FUNCTION constexpr static unsigned char bor() {return static_cast<unsigned char>(0x0);}
138  KOKKOS_FORCEINLINE_FUNCTION constexpr static unsigned char band() {return ~static_cast<unsigned char>(0x0);}
139  KOKKOS_FORCEINLINE_FUNCTION constexpr static unsigned char lor() {return static_cast<unsigned char>(0);}
140  KOKKOS_FORCEINLINE_FUNCTION constexpr static unsigned char land() {return static_cast<unsigned char>(1);}
141 };
142 
143 template<>
144 struct reduction_identity<unsigned short> {
145  KOKKOS_FORCEINLINE_FUNCTION constexpr static unsigned short sum() {return static_cast<unsigned short>(0);}
146  KOKKOS_FORCEINLINE_FUNCTION constexpr static unsigned short prod() {return static_cast<unsigned short>(1);}
147  KOKKOS_FORCEINLINE_FUNCTION constexpr static unsigned short max() {return static_cast<unsigned short>(0);}
148  KOKKOS_FORCEINLINE_FUNCTION constexpr static unsigned short min() {return USHRT_MAX;}
149  KOKKOS_FORCEINLINE_FUNCTION constexpr static unsigned short bor() {return static_cast<unsigned short>(0x0);}
150  KOKKOS_FORCEINLINE_FUNCTION constexpr static unsigned short band() {return ~static_cast<unsigned short>(0x0);}
151  KOKKOS_FORCEINLINE_FUNCTION constexpr static unsigned short lor() {return static_cast<unsigned short>(0);}
152  KOKKOS_FORCEINLINE_FUNCTION constexpr static unsigned short land() {return static_cast<unsigned short>(1);}
153 };
154 
155 template<>
156 struct reduction_identity<unsigned int> {
157  KOKKOS_FORCEINLINE_FUNCTION constexpr static unsigned int sum() {return static_cast<unsigned int>(0);}
158  KOKKOS_FORCEINLINE_FUNCTION constexpr static unsigned int prod() {return static_cast<unsigned int>(1);}
159  KOKKOS_FORCEINLINE_FUNCTION constexpr static unsigned int max() {return static_cast<unsigned int>(0);}
160  KOKKOS_FORCEINLINE_FUNCTION constexpr static unsigned int min() {return UINT_MAX;}
161  KOKKOS_FORCEINLINE_FUNCTION constexpr static unsigned int bor() {return static_cast<unsigned int>(0x0);}
162  KOKKOS_FORCEINLINE_FUNCTION constexpr static unsigned int band() {return ~static_cast<unsigned int>(0x0);}
163  KOKKOS_FORCEINLINE_FUNCTION constexpr static unsigned int lor() {return static_cast<unsigned int>(0);}
164  KOKKOS_FORCEINLINE_FUNCTION constexpr static unsigned int land() {return static_cast<unsigned int>(1);}
165 };
166 
167 template<>
168 struct reduction_identity<unsigned long> {
169  KOKKOS_FORCEINLINE_FUNCTION constexpr static unsigned long sum() {return static_cast<unsigned long>(0);}
170  KOKKOS_FORCEINLINE_FUNCTION constexpr static unsigned long prod() {return static_cast<unsigned long>(1);}
171  KOKKOS_FORCEINLINE_FUNCTION constexpr static unsigned long max() {return static_cast<unsigned long>(0);}
172  KOKKOS_FORCEINLINE_FUNCTION constexpr static unsigned long min() {return ULONG_MAX;}
173  KOKKOS_FORCEINLINE_FUNCTION constexpr static unsigned long bor() {return static_cast<unsigned long>(0x0);}
174  KOKKOS_FORCEINLINE_FUNCTION constexpr static unsigned long band() {return ~static_cast<unsigned long>(0x0);}
175  KOKKOS_FORCEINLINE_FUNCTION constexpr static unsigned long lor() {return static_cast<unsigned long>(0);}
176  KOKKOS_FORCEINLINE_FUNCTION constexpr static unsigned long land() {return static_cast<unsigned long>(1);}
177 };
178 
179 template<>
180 struct reduction_identity<unsigned long long> {
181  KOKKOS_FORCEINLINE_FUNCTION constexpr static unsigned long long sum() {return static_cast<unsigned long long>(0);}
182  KOKKOS_FORCEINLINE_FUNCTION constexpr static unsigned long long prod() {return static_cast<unsigned long long>(1);}
183  KOKKOS_FORCEINLINE_FUNCTION constexpr static unsigned long long max() {return static_cast<unsigned long long>(0);}
184  KOKKOS_FORCEINLINE_FUNCTION constexpr static unsigned long long min() {return ULLONG_MAX;}
185  KOKKOS_FORCEINLINE_FUNCTION constexpr static unsigned long long bor() {return static_cast<unsigned long long>(0x0);}
186  KOKKOS_FORCEINLINE_FUNCTION constexpr static unsigned long long band() {return ~static_cast<unsigned long long>(0x0);}
187  KOKKOS_FORCEINLINE_FUNCTION constexpr static unsigned long long lor() {return static_cast<unsigned long long>(0);}
188  KOKKOS_FORCEINLINE_FUNCTION constexpr static unsigned long long land() {return static_cast<unsigned long long>(1);}
189 };
190 
191 template<>
192 struct reduction_identity<float> {
193  KOKKOS_FORCEINLINE_FUNCTION constexpr static float sum() {return static_cast<float>(0.0f);}
194  KOKKOS_FORCEINLINE_FUNCTION constexpr static float prod() {return static_cast<float>(1.0f);}
195  KOKKOS_FORCEINLINE_FUNCTION constexpr static float max() {return -FLT_MAX;}
196  KOKKOS_FORCEINLINE_FUNCTION constexpr static float min() {return FLT_MAX;}
197 };
198 
199 template<>
200 struct reduction_identity<double> {
201  KOKKOS_FORCEINLINE_FUNCTION constexpr static double sum() {return static_cast<double>(0.0);}
202  KOKKOS_FORCEINLINE_FUNCTION constexpr static double prod() {return static_cast<double>(1.0);}
203  KOKKOS_FORCEINLINE_FUNCTION constexpr static double max() {return -DBL_MAX;}
204  KOKKOS_FORCEINLINE_FUNCTION constexpr static double min() {return DBL_MAX;}
205 };
206 
207 #if !defined( KOKKOS_ACTIVE_EXECUTION_MEMORY_SPACE_CUDA )
208 template<>
209 struct reduction_identity<long double> {
210  KOKKOS_FORCEINLINE_FUNCTION constexpr static long double sum() {return static_cast<long double>(0.0);}
211  KOKKOS_FORCEINLINE_FUNCTION constexpr static long double prod() {return static_cast<long double>(1.0);}
212  KOKKOS_FORCEINLINE_FUNCTION constexpr static long double max() {return -LDBL_MAX;}
213  KOKKOS_FORCEINLINE_FUNCTION constexpr static long double min() {return LDBL_MAX;}
214 };
215 #endif
216 
217 }
218 
219 #endif
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