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
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
|
/// @ref core
#include "_vectorize.hpp"
#if(GLM_ARCH & GLM_ARCH_X86 && GLM_COMPILER & GLM_COMPILER_VC)
# include <intrin.h>
# pragma intrinsic(_BitScanReverse)
#endif//(GLM_ARCH & GLM_ARCH_X86 && GLM_COMPILER & GLM_COMPILER_VC)
#include <limits>
#if !GLM_HAS_EXTENDED_INTEGER_TYPE
# if GLM_COMPILER & GLM_COMPILER_GCC
# pragma GCC diagnostic ignored "-Wlong-long"
# endif
# if (GLM_COMPILER & GLM_COMPILER_CLANG)
# pragma clang diagnostic ignored "-Wc++11-long-long"
# endif
#endif
namespace glm{
namespace detail
{
template<typename T>
GLM_FUNC_QUALIFIER T mask(T Bits)
{
return Bits >= static_cast<T>(sizeof(T) * 8) ? ~static_cast<T>(0) : (static_cast<T>(1) << Bits) - static_cast<T>(1);
}
template<length_t L, typename T, qualifier Q, bool Aligned, bool EXEC>
struct compute_bitfieldReverseStep
{
GLM_FUNC_QUALIFIER static vec<L, T, Q> call(vec<L, T, Q> const& v, T, T)
{
return v;
}
};
template<length_t L, typename T, qualifier Q, bool Aligned>
struct compute_bitfieldReverseStep<L, T, Q, Aligned, true>
{
GLM_FUNC_QUALIFIER static vec<L, T, Q> call(vec<L, T, Q> const& v, T Mask, T Shift)
{
return (v & Mask) << Shift | (v & (~Mask)) >> Shift;
}
};
template<length_t L, typename T, qualifier Q, bool Aligned, bool EXEC>
struct compute_bitfieldBitCountStep
{
GLM_FUNC_QUALIFIER static vec<L, T, Q> call(vec<L, T, Q> const& v, T, T)
{
return v;
}
};
template<length_t L, typename T, qualifier Q, bool Aligned>
struct compute_bitfieldBitCountStep<L, T, Q, Aligned, true>
{
GLM_FUNC_QUALIFIER static vec<L, T, Q> call(vec<L, T, Q> const& v, T Mask, T Shift)
{
return (v & Mask) + ((v >> Shift) & Mask);
}
};
template<typename genIUType, size_t Bits>
struct compute_findLSB
{
GLM_FUNC_QUALIFIER static int call(genIUType Value)
{
if(Value == 0)
return -1;
return glm::bitCount(~Value & (Value - static_cast<genIUType>(1)));
}
};
# if GLM_HAS_BITSCAN_WINDOWS
template<typename genIUType>
struct compute_findLSB<genIUType, 32>
{
GLM_FUNC_QUALIFIER static int call(genIUType Value)
{
unsigned long Result(0);
unsigned char IsNotNull = _BitScanForward(&Result, *reinterpret_cast<unsigned long*>(&Value));
return IsNotNull ? int(Result) : -1;
}
};
# if !((GLM_COMPILER & GLM_COMPILER_VC) && (GLM_MODEL == GLM_MODEL_32))
template<typename genIUType>
struct compute_findLSB<genIUType, 64>
{
GLM_FUNC_QUALIFIER static int call(genIUType Value)
{
unsigned long Result(0);
unsigned char IsNotNull = _BitScanForward64(&Result, *reinterpret_cast<unsigned __int64*>(&Value));
return IsNotNull ? int(Result) : -1;
}
};
# endif
# endif//GLM_HAS_BITSCAN_WINDOWS
template<length_t L, typename T, qualifier Q, bool EXEC = true>
struct compute_findMSB_step_vec
{
GLM_FUNC_QUALIFIER static vec<L, T, Q> call(vec<L, T, Q> const& x, T Shift)
{
return x | (x >> Shift);
}
};
template<length_t L, typename T, qualifier Q>
struct compute_findMSB_step_vec<L, T, Q, false>
{
GLM_FUNC_QUALIFIER static vec<L, T, Q> call(vec<L, T, Q> const& x, T)
{
return x;
}
};
template<length_t L, typename T, qualifier Q, int>
struct compute_findMSB_vec
{
GLM_FUNC_QUALIFIER static vec<L, int, Q> call(vec<L, T, Q> const& v)
{
vec<L, T, Q> x(v);
x = compute_findMSB_step_vec<L, T, Q, sizeof(T) * 8 >= 8>::call(x, static_cast<T>( 1));
x = compute_findMSB_step_vec<L, T, Q, sizeof(T) * 8 >= 8>::call(x, static_cast<T>( 2));
x = compute_findMSB_step_vec<L, T, Q, sizeof(T) * 8 >= 8>::call(x, static_cast<T>( 4));
x = compute_findMSB_step_vec<L, T, Q, sizeof(T) * 8 >= 16>::call(x, static_cast<T>( 8));
x = compute_findMSB_step_vec<L, T, Q, sizeof(T) * 8 >= 32>::call(x, static_cast<T>(16));
x = compute_findMSB_step_vec<L, T, Q, sizeof(T) * 8 >= 64>::call(x, static_cast<T>(32));
return vec<L, int, Q>(sizeof(T) * 8 - 1) - glm::bitCount(~x);
}
};
# if GLM_HAS_BITSCAN_WINDOWS
template<typename genIUType>
GLM_FUNC_QUALIFIER int compute_findMSB_32(genIUType Value)
{
unsigned long Result(0);
unsigned char IsNotNull = _BitScanReverse(&Result, *reinterpret_cast<unsigned long*>(&Value));
return IsNotNull ? int(Result) : -1;
}
template<length_t L, typename T, qualifier Q>
struct compute_findMSB_vec<L, T, Q, 32>
{
GLM_FUNC_QUALIFIER static vec<L, int, Q> call(vec<L, T, Q> const& x)
{
return detail::functor1<vec, L, int, T, Q>::call(compute_findMSB_32, x);
}
};
# if !((GLM_COMPILER & GLM_COMPILER_VC) && (GLM_MODEL == GLM_MODEL_32))
template<typename genIUType>
GLM_FUNC_QUALIFIER int compute_findMSB_64(genIUType Value)
{
unsigned long Result(0);
unsigned char IsNotNull = _BitScanReverse64(&Result, *reinterpret_cast<unsigned __int64*>(&Value));
return IsNotNull ? int(Result) : -1;
}
template<length_t L, typename T, qualifier Q>
struct compute_findMSB_vec<L, T, Q, 64>
{
GLM_FUNC_QUALIFIER static vec<L, int, Q> call(vec<L, T, Q> const& x)
{
return detail::functor1<vec, L, int, T, Q>::call(compute_findMSB_64, x);
}
};
# endif
# endif//GLM_HAS_BITSCAN_WINDOWS
}//namespace detail
// uaddCarry
GLM_FUNC_QUALIFIER uint uaddCarry(uint const& x, uint const& y, uint & Carry)
{
detail::uint64 const Value64(static_cast<detail::uint64>(x) + static_cast<detail::uint64>(y));
detail::uint64 const Max32((static_cast<detail::uint64>(1) << static_cast<detail::uint64>(32)) - static_cast<detail::uint64>(1));
Carry = Value64 > Max32 ? 1u : 0u;
return static_cast<uint>(Value64 % (Max32 + static_cast<detail::uint64>(1)));
}
template<length_t L, qualifier Q>
GLM_FUNC_QUALIFIER vec<L, uint, Q> uaddCarry(vec<L, uint, Q> const& x, vec<L, uint, Q> const& y, vec<L, uint, Q>& Carry)
{
vec<L, detail::uint64, Q> Value64(vec<L, detail::uint64, Q>(x) + vec<L, detail::uint64, Q>(y));
vec<L, detail::uint64, Q> Max32((static_cast<detail::uint64>(1) << static_cast<detail::uint64>(32)) - static_cast<detail::uint64>(1));
Carry = mix(vec<L, uint, Q>(0), vec<L, uint, Q>(1), greaterThan(Value64, Max32));
return vec<L, uint, Q>(Value64 % (Max32 + static_cast<detail::uint64>(1)));
}
// usubBorrow
GLM_FUNC_QUALIFIER uint usubBorrow(uint const& x, uint const& y, uint & Borrow)
{
Borrow = x >= y ? static_cast<uint>(0) : static_cast<uint>(1);
if(y >= x)
return y - x;
else
return static_cast<uint>((static_cast<detail::int64>(1) << static_cast<detail::int64>(32)) + (static_cast<detail::int64>(y) - static_cast<detail::int64>(x)));
}
template<length_t L, qualifier Q>
GLM_FUNC_QUALIFIER vec<L, uint, Q> usubBorrow(vec<L, uint, Q> const& x, vec<L, uint, Q> const& y, vec<L, uint, Q>& Borrow)
{
Borrow = mix(vec<L, uint, Q>(1), vec<L, uint, Q>(0), greaterThanEqual(x, y));
vec<L, uint, Q> const YgeX(y - x);
vec<L, uint, Q> const XgeY(vec<L, uint, Q>((static_cast<detail::int64>(1) << static_cast<detail::int64>(32)) + (vec<L, detail::int64, Q>(y) - vec<L, detail::int64, Q>(x))));
return mix(XgeY, YgeX, greaterThanEqual(y, x));
}
// umulExtended
GLM_FUNC_QUALIFIER void umulExtended(uint const& x, uint const& y, uint & msb, uint & lsb)
{
detail::uint64 Value64 = static_cast<detail::uint64>(x) * static_cast<detail::uint64>(y);
msb = static_cast<uint>(Value64 >> static_cast<detail::uint64>(32));
lsb = static_cast<uint>(Value64);
}
template<length_t L, qualifier Q>
GLM_FUNC_QUALIFIER void umulExtended(vec<L, uint, Q> const& x, vec<L, uint, Q> const& y, vec<L, uint, Q>& msb, vec<L, uint, Q>& lsb)
{
vec<L, detail::uint64, Q> Value64(vec<L, detail::uint64, Q>(x) * vec<L, detail::uint64, Q>(y));
msb = vec<L, uint, Q>(Value64 >> static_cast<detail::uint64>(32));
lsb = vec<L, uint, Q>(Value64);
}
// imulExtended
GLM_FUNC_QUALIFIER void imulExtended(int x, int y, int& msb, int& lsb)
{
detail::int64 Value64 = static_cast<detail::int64>(x) * static_cast<detail::int64>(y);
msb = static_cast<int>(Value64 >> static_cast<detail::int64>(32));
lsb = static_cast<int>(Value64);
}
template<length_t L, qualifier Q>
GLM_FUNC_QUALIFIER void imulExtended(vec<L, int, Q> const& x, vec<L, int, Q> const& y, vec<L, int, Q>& msb, vec<L, int, Q>& lsb)
{
vec<L, detail::int64, Q> Value64(vec<L, detail::int64, Q>(x) * vec<L, detail::int64, Q>(y));
lsb = vec<L, int, Q>(Value64 & static_cast<detail::int64>(0xFFFFFFFF));
msb = vec<L, int, Q>((Value64 >> static_cast<detail::int64>(32)) & static_cast<detail::int64>(0xFFFFFFFF));
}
// bitfieldExtract
template<typename genIUType>
GLM_FUNC_QUALIFIER genIUType bitfieldExtract(genIUType Value, int Offset, int Bits)
{
return bitfieldExtract(vec<1, genIUType>(Value), Offset, Bits).x;
}
template<length_t L, typename T, qualifier Q>
GLM_FUNC_QUALIFIER vec<L, T, Q> bitfieldExtract(vec<L, T, Q> const& Value, int Offset, int Bits)
{
GLM_STATIC_ASSERT(std::numeric_limits<T>::is_integer, "'bitfieldExtract' only accept integer inputs");
return (Value >> static_cast<T>(Offset)) & static_cast<T>(detail::mask(Bits));
}
// bitfieldInsert
template<typename genIUType>
GLM_FUNC_QUALIFIER genIUType bitfieldInsert(genIUType const& Base, genIUType const& Insert, int Offset, int Bits)
{
GLM_STATIC_ASSERT(std::numeric_limits<genIUType>::is_integer, "'bitfieldInsert' only accept integer values");
return bitfieldInsert(vec<1, genIUType>(Base), vec<1, genIUType>(Insert), Offset, Bits).x;
}
template<length_t L, typename T, qualifier Q>
GLM_FUNC_QUALIFIER vec<L, T, Q> bitfieldInsert(vec<L, T, Q> const& Base, vec<L, T, Q> const& Insert, int Offset, int Bits)
{
GLM_STATIC_ASSERT(std::numeric_limits<T>::is_integer, "'bitfieldInsert' only accept integer values");
T const Mask = static_cast<T>(detail::mask(Bits) << Offset);
return (Base & ~Mask) | ((Insert << static_cast<T>(Offset)) & Mask);
}
// bitfieldReverse
template<typename genIUType>
GLM_FUNC_QUALIFIER genIUType bitfieldReverse(genIUType x)
{
GLM_STATIC_ASSERT(std::numeric_limits<genIUType>::is_integer, "'bitfieldReverse' only accept integer values");
return bitfieldReverse(glm::vec<1, genIUType, glm::defaultp>(x)).x;
}
template<length_t L, typename T, qualifier Q>
GLM_FUNC_QUALIFIER vec<L, T, Q> bitfieldReverse(vec<L, T, Q> const& v)
{
GLM_STATIC_ASSERT(std::numeric_limits<T>::is_integer, "'bitfieldReverse' only accept integer values");
vec<L, T, Q> x(v);
x = detail::compute_bitfieldReverseStep<L, T, Q, detail::is_aligned<Q>::value, sizeof(T) * 8>= 2>::call(x, static_cast<T>(0x5555555555555555ull), static_cast<T>( 1));
x = detail::compute_bitfieldReverseStep<L, T, Q, detail::is_aligned<Q>::value, sizeof(T) * 8>= 4>::call(x, static_cast<T>(0x3333333333333333ull), static_cast<T>( 2));
x = detail::compute_bitfieldReverseStep<L, T, Q, detail::is_aligned<Q>::value, sizeof(T) * 8>= 8>::call(x, static_cast<T>(0x0F0F0F0F0F0F0F0Full), static_cast<T>( 4));
x = detail::compute_bitfieldReverseStep<L, T, Q, detail::is_aligned<Q>::value, sizeof(T) * 8>= 16>::call(x, static_cast<T>(0x00FF00FF00FF00FFull), static_cast<T>( 8));
x = detail::compute_bitfieldReverseStep<L, T, Q, detail::is_aligned<Q>::value, sizeof(T) * 8>= 32>::call(x, static_cast<T>(0x0000FFFF0000FFFFull), static_cast<T>(16));
x = detail::compute_bitfieldReverseStep<L, T, Q, detail::is_aligned<Q>::value, sizeof(T) * 8>= 64>::call(x, static_cast<T>(0x00000000FFFFFFFFull), static_cast<T>(32));
return x;
}
// bitCount
template<typename genIUType>
GLM_FUNC_QUALIFIER int bitCount(genIUType x)
{
GLM_STATIC_ASSERT(std::numeric_limits<genIUType>::is_integer, "'bitCount' only accept integer values");
return bitCount(glm::vec<1, genIUType, glm::defaultp>(x)).x;
}
template<length_t L, typename T, qualifier Q>
GLM_FUNC_QUALIFIER vec<L, int, Q> bitCount(vec<L, T, Q> const& v)
{
GLM_STATIC_ASSERT(std::numeric_limits<T>::is_integer, "'bitCount' only accept integer values");
# if GLM_COMPILER & GLM_COMPILER_VC
# pragma warning(push)
# pragma warning(disable : 4310) //cast truncates constant value
# endif
vec<L, typename detail::make_unsigned<T>::type, Q> x(*reinterpret_cast<vec<L, typename detail::make_unsigned<T>::type, Q> const *>(&v));
x = detail::compute_bitfieldBitCountStep<L, typename detail::make_unsigned<T>::type, Q, detail::is_aligned<Q>::value, sizeof(T) * 8>= 2>::call(x, typename detail::make_unsigned<T>::type(0x5555555555555555ull), typename detail::make_unsigned<T>::type( 1));
x = detail::compute_bitfieldBitCountStep<L, typename detail::make_unsigned<T>::type, Q, detail::is_aligned<Q>::value, sizeof(T) * 8>= 4>::call(x, typename detail::make_unsigned<T>::type(0x3333333333333333ull), typename detail::make_unsigned<T>::type( 2));
x = detail::compute_bitfieldBitCountStep<L, typename detail::make_unsigned<T>::type, Q, detail::is_aligned<Q>::value, sizeof(T) * 8>= 8>::call(x, typename detail::make_unsigned<T>::type(0x0F0F0F0F0F0F0F0Full), typename detail::make_unsigned<T>::type( 4));
x = detail::compute_bitfieldBitCountStep<L, typename detail::make_unsigned<T>::type, Q, detail::is_aligned<Q>::value, sizeof(T) * 8>= 16>::call(x, typename detail::make_unsigned<T>::type(0x00FF00FF00FF00FFull), typename detail::make_unsigned<T>::type( 8));
x = detail::compute_bitfieldBitCountStep<L, typename detail::make_unsigned<T>::type, Q, detail::is_aligned<Q>::value, sizeof(T) * 8>= 32>::call(x, typename detail::make_unsigned<T>::type(0x0000FFFF0000FFFFull), typename detail::make_unsigned<T>::type(16));
x = detail::compute_bitfieldBitCountStep<L, typename detail::make_unsigned<T>::type, Q, detail::is_aligned<Q>::value, sizeof(T) * 8>= 64>::call(x, typename detail::make_unsigned<T>::type(0x00000000FFFFFFFFull), typename detail::make_unsigned<T>::type(32));
return vec<L, int, Q>(x);
# if GLM_COMPILER & GLM_COMPILER_VC
# pragma warning(pop)
# endif
}
// findLSB
template<typename genIUType>
GLM_FUNC_QUALIFIER int findLSB(genIUType Value)
{
GLM_STATIC_ASSERT(std::numeric_limits<genIUType>::is_integer, "'findLSB' only accept integer values");
return detail::compute_findLSB<genIUType, sizeof(genIUType) * 8>::call(Value);
}
template<length_t L, typename T, qualifier Q>
GLM_FUNC_QUALIFIER vec<L, int, Q> findLSB(vec<L, T, Q> const& x)
{
GLM_STATIC_ASSERT(std::numeric_limits<T>::is_integer, "'findLSB' only accept integer values");
return detail::functor1<vec, L, int, T, Q>::call(findLSB, x);
}
// findMSB
template<typename genIUType>
GLM_FUNC_QUALIFIER int findMSB(genIUType v)
{
GLM_STATIC_ASSERT(std::numeric_limits<genIUType>::is_integer, "'findMSB' only accept integer values");
return findMSB(vec<1, genIUType>(v)).x;
}
template<length_t L, typename T, qualifier Q>
GLM_FUNC_QUALIFIER vec<L, int, Q> findMSB(vec<L, T, Q> const& v)
{
GLM_STATIC_ASSERT(std::numeric_limits<T>::is_integer, "'findMSB' only accept integer values");
return detail::compute_findMSB_vec<L, T, Q, sizeof(T) * 8>::call(v);
}
}//namespace glm
#if GLM_CONFIG_SIMD == GLM_ENABLE
# include "func_integer_simd.inl"
#endif
|
