1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
|
// This code is in the public domain -- Ignacio Castaño <castano@gmail.com>
#pragma once
#ifndef NV_CORE_UTILS_H
#define NV_CORE_UTILS_H
#include "Debug.h" // nvDebugCheck
#include <new> // for placement new
// Just in case. Grrr.
#undef min
#undef max
#define NV_INT8_MIN (-128)
#define NV_INT8_MAX 127
#define NV_UINT8_MAX 255
#define NV_INT16_MIN (-32767-1)
#define NV_INT16_MAX 32767
#define NV_UINT16_MAX 0xffff
#define NV_INT32_MIN (-2147483647-1)
#define NV_INT32_MAX 2147483647
#define NV_UINT32_MAX 0xffffffff
#define NV_INT64_MAX POSH_I64(9223372036854775807)
#define NV_INT64_MIN (-POSH_I64(9223372036854775807)-1)
#define NV_UINT64_MAX POSH_U64(0xffffffffffffffff)
#define NV_HALF_MAX 65504.0F
#define NV_FLOAT_MAX 3.402823466e+38F
#define NV_INTEGER_TO_FLOAT_MAX 16777217 // Largest integer such that it and all smaller integers can be stored in a 32bit float.
namespace nv
{
// Less error prone than casting. From CB:
// http://cbloomrants.blogspot.com/2011/06/06-17-11-c-casting-is-devil.html
// These intentionally look like casts.
// uint64 casts:
template <typename T> inline uint64 U64(T x) { return x; }
//template <> inline uint64 U64<uint64>(uint64 x) { return x; }
template <> inline uint64 U64<int64>(int64 x) { nvDebugCheck(x >= 0); return (uint64)x; }
//template <> inline uint64 U32<uint32>(uint32 x) { return x; }
template <> inline uint64 U64<int32>(int32 x) { nvDebugCheck(x >= 0); return (uint64)x; }
//template <> inline uint64 U64<uint16>(uint16 x) { return x; }
template <> inline uint64 U64<int16>(int16 x) { nvDebugCheck(x >= 0); return (uint64)x; }
//template <> inline uint64 U64<uint8>(uint8 x) { return x; }
template <> inline uint64 U64<int8>(int8 x) { nvDebugCheck(x >= 0); return (uint64)x; }
// int64 casts:
template <typename T> inline int64 I64(T x) { return x; }
template <> inline int64 I64<uint64>(uint64 x) { nvDebugCheck(x <= NV_INT64_MAX); return (int64)x; }
//template <> inline uint64 U64<int64>(int64 x) { return x; }
//template <> inline uint64 U32<uint32>(uint32 x) { return x; }
//template <> inline uint64 U64<int32>(int32 x) { return x; }
//template <> inline uint64 U64<uint16>(uint16 x) { return x; }
//template <> inline uint64 U64<int16>(int16 x) { return x; }
//template <> inline uint64 U64<uint8>(uint8 x) { return x; }
//template <> inline uint64 U64<int8>(int8 x) { return x; }
// uint32 casts:
template <typename T> inline uint32 U32(T x) { return x; }
template <> inline uint32 U32<uint64>(uint64 x) { nvDebugCheck(x <= NV_UINT32_MAX); return (uint32)x; }
template <> inline uint32 U32<int64>(int64 x) { nvDebugCheck(x >= 0 && x <= NV_UINT32_MAX); return (uint32)x; }
//template <> inline uint32 U32<uint32>(uint32 x) { return x; }
template <> inline uint32 U32<int32>(int32 x) { nvDebugCheck(x >= 0); return (uint32)x; }
//template <> inline uint32 U32<uint16>(uint16 x) { return x; }
template <> inline uint32 U32<int16>(int16 x) { nvDebugCheck(x >= 0); return (uint32)x; }
//template <> inline uint32 U32<uint8>(uint8 x) { return x; }
template <> inline uint32 U32<int8>(int8 x) { nvDebugCheck(x >= 0); return (uint32)x; }
// int32 casts:
template <typename T> inline int32 I32(T x) { return x; }
template <> inline int32 I32<uint64>(uint64 x) { nvDebugCheck(x <= NV_INT32_MAX); return (int32)x; }
template <> inline int32 I32<int64>(int64 x) { nvDebugCheck(x >= NV_INT32_MIN && x <= NV_UINT32_MAX); return (int32)x; }
template <> inline int32 I32<uint32>(uint32 x) { nvDebugCheck(x <= NV_INT32_MAX); return (int32)x; }
//template <> inline int32 I32<int32>(int32 x) { return x; }
//template <> inline int32 I32<uint16>(uint16 x) { return x; }
//template <> inline int32 I32<int16>(int16 x) { return x; }
//template <> inline int32 I32<uint8>(uint8 x) { return x; }
//template <> inline int32 I32<int8>(int8 x) { return x; }
// uint16 casts:
template <typename T> inline uint16 U16(T x) { return x; }
template <> inline uint16 U16<uint64>(uint64 x) { nvDebugCheck(x <= NV_UINT16_MAX); return (uint16)x; }
template <> inline uint16 U16<int64>(int64 x) { nvDebugCheck(x >= 0 && x <= NV_UINT16_MAX); return (uint16)x; }
template <> inline uint16 U16<uint32>(uint32 x) { nvDebugCheck(x <= NV_UINT16_MAX); return (uint16)x; }
template <> inline uint16 U16<int32>(int32 x) { nvDebugCheck(x >= 0 && x <= NV_UINT16_MAX); return (uint16)x; }
//template <> inline uint16 U16<uint16>(uint16 x) { return x; }
template <> inline uint16 U16<int16>(int16 x) { nvDebugCheck(x >= 0); return (uint16)x; }
//template <> inline uint16 U16<uint8>(uint8 x) { return x; }
template <> inline uint16 U16<int8>(int8 x) { nvDebugCheck(x >= 0); return (uint16)x; }
// int16 casts:
template <typename T> inline int16 I16(T x) { return x; }
template <> inline int16 I16<uint64>(uint64 x) { nvDebugCheck(x <= NV_INT16_MAX); return (int16)x; }
template <> inline int16 I16<int64>(int64 x) { nvDebugCheck(x >= NV_INT16_MIN && x <= NV_UINT16_MAX); return (int16)x; }
template <> inline int16 I16<uint32>(uint32 x) { nvDebugCheck(x <= NV_INT16_MAX); return (int16)x; }
template <> inline int16 I16<int32>(int32 x) { nvDebugCheck(x >= NV_INT16_MIN && x <= NV_UINT16_MAX); return (int16)x; }
template <> inline int16 I16<uint16>(uint16 x) { nvDebugCheck(x <= NV_INT16_MAX); return (int16)x; }
//template <> inline int16 I16<int16>(int16 x) { return x; }
//template <> inline int16 I16<uint8>(uint8 x) { return x; }
//template <> inline int16 I16<int8>(int8 x) { return x; }
// uint8 casts:
template <typename T> inline uint8 U8(T x) { return x; }
template <> inline uint8 U8<uint64>(uint64 x) { nvDebugCheck(x <= NV_UINT8_MAX); return (uint8)x; }
template <> inline uint8 U8<int64>(int64 x) { nvDebugCheck(x >= 0 && x <= NV_UINT8_MAX); return (uint8)x; }
template <> inline uint8 U8<uint32>(uint32 x) { nvDebugCheck(x <= NV_UINT8_MAX); return (uint8)x; }
template <> inline uint8 U8<int32>(int32 x) { nvDebugCheck(x >= 0 && x <= NV_UINT8_MAX); return (uint8)x; }
template <> inline uint8 U8<uint16>(uint16 x) { nvDebugCheck(x <= NV_UINT8_MAX); return (uint8)x; }
template <> inline uint8 U8<int16>(int16 x) { nvDebugCheck(x >= 0 && x <= NV_UINT8_MAX); return (uint8)x; }
//template <> inline uint8 U8<uint8>(uint8 x) { return x; }
template <> inline uint8 U8<int8>(int8 x) { nvDebugCheck(x >= 0); return (uint8)x; }
//template <> inline uint8 U8<float>(int8 x) { nvDebugCheck(x >= 0.0f && x <= 255.0f); return (uint8)x; }
// int8 casts:
template <typename T> inline int8 I8(T x) { return x; }
template <> inline int8 I8<uint64>(uint64 x) { nvDebugCheck(x <= NV_INT8_MAX); return (int8)x; }
template <> inline int8 I8<int64>(int64 x) { nvDebugCheck(x >= NV_INT8_MIN && x <= NV_UINT8_MAX); return (int8)x; }
template <> inline int8 I8<uint32>(uint32 x) { nvDebugCheck(x <= NV_INT8_MAX); return (int8)x; }
template <> inline int8 I8<int32>(int32 x) { nvDebugCheck(x >= NV_INT8_MIN && x <= NV_UINT8_MAX); return (int8)x; }
template <> inline int8 I8<uint16>(uint16 x) { nvDebugCheck(x <= NV_INT8_MAX); return (int8)x; }
template <> inline int8 I8<int16>(int16 x) { nvDebugCheck(x >= NV_INT8_MIN && x <= NV_UINT8_MAX); return (int8)x; }
template <> inline int8 I8<uint8>(uint8 x) { nvDebugCheck(x <= NV_INT8_MAX); return (int8)x; }
//template <> inline int8 I8<int8>(int8 x) { return x; }
// float casts:
template <typename T> inline float F32(T x) { return x; }
template <> inline float F32<uint64>(uint64 x) { nvDebugCheck(x <= NV_INTEGER_TO_FLOAT_MAX); return (float)x; }
template <> inline float F32<int64>(int64 x) { nvDebugCheck(x >= -NV_INTEGER_TO_FLOAT_MAX && x <= NV_INTEGER_TO_FLOAT_MAX); return (float)x; }
template <> inline float F32<uint32>(uint32 x) { nvDebugCheck(x <= NV_INTEGER_TO_FLOAT_MAX); return (float)x; }
template <> inline float F32<int32>(int32 x) { nvDebugCheck(x >= -NV_INTEGER_TO_FLOAT_MAX && x <= NV_INTEGER_TO_FLOAT_MAX); return (float)x; }
// The compiler should not complain about these conversions:
//template <> inline float F32<uint16>(uint16 x) { nvDebugCheck(return (float)x; }
//template <> inline float F32<int16>(int16 x) { nvDebugCheck(return (float)x; }
//template <> inline float F32<uint8>(uint8 x) { nvDebugCheck(return (float)x; }
//template <> inline float F32<int8>(int8 x) { nvDebugCheck(return (float)x; }
/// Swap two values.
template <typename T>
inline void swap(T & a, T & b)
{
T temp(a);
a = b;
b = temp;
}
/// Return the maximum of the two arguments. For floating point values, it returns the second value if the first is NaN.
template <typename T>
//inline const T & max(const T & a, const T & b)
inline T max(const T & a, const T & b)
{
return (b < a) ? a : b;
}
/// Return the maximum of the four arguments.
template <typename T>
//inline const T & max4(const T & a, const T & b, const T & c)
inline T max4(const T & a, const T & b, const T & c, const T & d)
{
return max(max(a, b), max(c, d));
}
/// Return the maximum of the three arguments.
template <typename T>
//inline const T & max3(const T & a, const T & b, const T & c)
inline T max3(const T & a, const T & b, const T & c)
{
return max(a, max(b, c));
}
/// Return the minimum of two values.
template <typename T>
//inline const T & min(const T & a, const T & b)
inline T min(const T & a, const T & b)
{
return (a < b) ? a : b;
}
/// Return the maximum of the three arguments.
template <typename T>
//inline const T & min3(const T & a, const T & b, const T & c)
inline T min3(const T & a, const T & b, const T & c)
{
return min(a, min(b, c));
}
/// Clamp between two values.
template <typename T>
//inline const T & clamp(const T & x, const T & a, const T & b)
inline T clamp(const T & x, const T & a, const T & b)
{
return min(max(x, a), b);
}
/** Return the next power of two.
* @see http://graphics.stanford.edu/~seander/bithacks.html
* @warning Behaviour for 0 is undefined.
* @note isPowerOfTwo(x) == true -> nextPowerOfTwo(x) == x
* @note nextPowerOfTwo(x) = 2 << log2(x-1)
*/
inline uint32 nextPowerOfTwo(uint32 x)
{
nvDebugCheck( x != 0 );
#if 1 // On modern CPUs this is supposed to be as fast as using the bsr instruction.
x--;
x |= x >> 1;
x |= x >> 2;
x |= x >> 4;
x |= x >> 8;
x |= x >> 16;
return x+1;
#else
uint p = 1;
while( x > p ) {
p += p;
}
return p;
#endif
}
inline uint64 nextPowerOfTwo(uint64 x)
{
nvDebugCheck(x != 0);
uint p = 1;
while (x > p) {
p += p;
}
return p;
}
// @@ Should I just use a macro instead?
template <typename T>
inline bool isPowerOfTwo(T n)
{
return (n & (n-1)) == 0;
}
// @@ Move this to utils?
/// Delete all the elements of a container.
template <typename T>
void deleteAll(T & container)
{
for (typename T::PseudoIndex i = container.start(); !container.isDone(i); container.advance(i))
{
delete container[i];
}
}
// @@ Specialize these methods for numeric, pointer, and pod types.
template <typename T>
void construct_range(T * restrict ptr, uint new_size, uint old_size) {
for (uint i = old_size; i < new_size; i++) {
new(ptr+i) T; // placement new
}
}
template <typename T>
void construct_range(T * restrict ptr, uint new_size, uint old_size, const T & elem) {
for (uint i = old_size; i < new_size; i++) {
new(ptr+i) T(elem); // placement new
}
}
template <typename T>
void construct_range(T * restrict ptr, uint new_size, uint old_size, const T * src) {
for (uint i = old_size; i < new_size; i++) {
new(ptr+i) T(src[i]); // placement new
}
}
template <typename T>
void destroy_range(T * restrict ptr, uint new_size, uint old_size) {
for (uint i = new_size; i < old_size; i++) {
(ptr+i)->~T(); // Explicit call to the destructor
}
}
template <typename T>
void fill(T * restrict dst, uint count, const T & value) {
for (uint i = 0; i < count; i++) {
dst[i] = value;
}
}
template <typename T>
void copy_range(T * restrict dst, const T * restrict src, uint count) {
for (uint i = 0; i < count; i++) {
dst[i] = src[i];
}
}
template <typename T>
bool find(const T & element, const T * restrict ptr, uint begin, uint end, uint * index) {
for (uint i = begin; i < end; i++) {
if (ptr[i] == element) {
if (index != NULL) *index = i;
return true;
}
}
return false;
}
} // nv namespace
#endif // NV_CORE_UTILS_H
|