1 /**************************************************************************** 2 * Copyright (C) 2014-2015 Intel Corporation. All Rights Reserved. 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a 5 * copy of this software and associated documentation files (the "Software"), 6 * to deal in the Software without restriction, including without limitation 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 8 * and/or sell copies of the Software, and to permit persons to whom the 9 * Software is furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice (including the next 12 * paragraph) shall be included in all copies or substantial portions of the 13 * Software. 14 * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS 21 * IN THE SOFTWARE. 22 * 23 * @file utils.h 24 * 25 * @brief Utilities used by SWR core. 26 * 27 ******************************************************************************/ 28 #pragma once 29 30 #include <string.h> 31 #include <type_traits> 32 #include <algorithm> 33 #include "common/os.h" 34 #include "common/intrin.h" 35 #include "common/swr_assert.h" 36 #include "core/api.h" 37 38 struct simdBBox 39 { 40 simdscalari ymin; 41 simdscalari ymax; 42 simdscalari xmin; 43 simdscalari xmax; 44 }; 45 46 #if ENABLE_AVX512_SIMD16 47 struct simd16BBox 48 { 49 simd16scalari ymin; 50 simd16scalari ymax; 51 simd16scalari xmin; 52 simd16scalari xmax; 53 }; 54 #endif 55 56 template<typename SIMD_T> 57 struct SIMDBBOX_T 58 { 59 typename SIMD_T::Integer ymin; 60 typename SIMD_T::Integer ymax; 61 typename SIMD_T::Integer xmin; 62 typename SIMD_T::Integer xmax; 63 }; 64 65 // helper function to unroll loops 66 template<int Begin, int End, int Step = 1> 67 struct UnrollerL { 68 template<typename Lambda> 69 INLINE static void step(Lambda& func) { 70 func(Begin); 71 UnrollerL<Begin + Step, End, Step>::step(func); 72 } 73 }; 74 75 template<int End, int Step> 76 struct UnrollerL<End, End, Step> { 77 template<typename Lambda> 78 static void step(Lambda& func) { 79 } 80 }; 81 82 // helper function to unroll loops, with mask to skip specific iterations 83 template<int Begin, int End, int Step = 1, int Mask = 0x7f> 84 struct UnrollerLMask { 85 template<typename Lambda> 86 INLINE static void step(Lambda& func) { 87 if(Mask & (1 << Begin)) 88 { 89 func(Begin); 90 } 91 UnrollerL<Begin + Step, End, Step>::step(func); 92 } 93 }; 94 95 template<int End, int Step, int Mask> 96 struct UnrollerLMask<End, End, Step, Mask> { 97 template<typename Lambda> 98 static void step(Lambda& func) { 99 } 100 }; 101 102 // general CRC compute 103 INLINE 104 uint32_t ComputeCRC(uint32_t crc, const void *pData, uint32_t size) 105 { 106 #if defined(_WIN64) || defined(__x86_64__) 107 uint32_t sizeInQwords = size / sizeof(uint64_t); 108 uint32_t sizeRemainderBytes = size % sizeof(uint64_t); 109 uint64_t* pDataWords = (uint64_t*)pData; 110 for (uint32_t i = 0; i < sizeInQwords; ++i) 111 { 112 crc = (uint32_t)_mm_crc32_u64(crc, *pDataWords++); 113 } 114 #else 115 uint32_t sizeInDwords = size / sizeof(uint32_t); 116 uint32_t sizeRemainderBytes = size % sizeof(uint32_t); 117 uint32_t* pDataWords = (uint32_t*)pData; 118 for (uint32_t i = 0; i < sizeInDwords; ++i) 119 { 120 crc = _mm_crc32_u32(crc, *pDataWords++); 121 } 122 #endif 123 124 uint8_t* pRemainderBytes = (uint8_t*)pDataWords; 125 for (uint32_t i = 0; i < sizeRemainderBytes; ++i) 126 { 127 crc = _mm_crc32_u8(crc, *pRemainderBytes++); 128 } 129 130 return crc; 131 } 132 133 ////////////////////////////////////////////////////////////////////////// 134 /// Check specified bit within a data word 135 ////////////////////////////////////////////////////////////////////////// 136 template <typename T> 137 INLINE 138 static bool CheckBit(T word, uint32_t bit) 139 { 140 return 0 != (word & (T(1) << bit)); 141 } 142 143 ////////////////////////////////////////////////////////////////////////// 144 /// Add byte offset to any-type pointer 145 ////////////////////////////////////////////////////////////////////////// 146 template <typename T> 147 INLINE 148 static T* PtrAdd(T* p, intptr_t offset) 149 { 150 intptr_t intp = reinterpret_cast<intptr_t>(p); 151 return reinterpret_cast<T*>(intp + offset); 152 } 153 154 ////////////////////////////////////////////////////////////////////////// 155 /// Is a power-of-2? 156 ////////////////////////////////////////////////////////////////////////// 157 template <typename T> 158 INLINE 159 static bool IsPow2(T value) 160 { 161 return value == (value & (T(0) - value)); 162 } 163 164 ////////////////////////////////////////////////////////////////////////// 165 /// Align down to specified alignment 166 /// Note: IsPow2(alignment) MUST be true 167 ////////////////////////////////////////////////////////////////////////// 168 template <typename T1, typename T2> 169 INLINE 170 static T1 AlignDownPow2(T1 value, T2 alignment) 171 { 172 SWR_ASSERT(IsPow2(alignment)); 173 return value & ~T1(alignment - 1); 174 } 175 176 ////////////////////////////////////////////////////////////////////////// 177 /// Align up to specified alignment 178 /// Note: IsPow2(alignment) MUST be true 179 ////////////////////////////////////////////////////////////////////////// 180 template <typename T1, typename T2> 181 INLINE 182 static T1 AlignUpPow2(T1 value, T2 alignment) 183 { 184 return AlignDownPow2(value + T1(alignment - 1), alignment); 185 } 186 187 ////////////////////////////////////////////////////////////////////////// 188 /// Align up ptr to specified alignment 189 /// Note: IsPow2(alignment) MUST be true 190 ////////////////////////////////////////////////////////////////////////// 191 template <typename T1, typename T2> 192 INLINE 193 static T1* AlignUpPow2(T1* value, T2 alignment) 194 { 195 return reinterpret_cast<T1*>( 196 AlignDownPow2(reinterpret_cast<uintptr_t>(value) + uintptr_t(alignment - 1), alignment)); 197 } 198 199 ////////////////////////////////////////////////////////////////////////// 200 /// Align down to specified alignment 201 ////////////////////////////////////////////////////////////////////////// 202 template <typename T1, typename T2> 203 INLINE 204 static T1 AlignDown(T1 value, T2 alignment) 205 { 206 if (IsPow2(alignment)) { return AlignDownPow2(value, alignment); } 207 return value - T1(value % alignment); 208 } 209 210 ////////////////////////////////////////////////////////////////////////// 211 /// Align down to specified alignment 212 ////////////////////////////////////////////////////////////////////////// 213 template <typename T1, typename T2> 214 INLINE 215 static T1* AlignDown(T1* value, T2 alignment) 216 { 217 return (T1*)AlignDown(uintptr_t(value), alignment); 218 } 219 220 ////////////////////////////////////////////////////////////////////////// 221 /// Align up to specified alignment 222 /// Note: IsPow2(alignment) MUST be true 223 ////////////////////////////////////////////////////////////////////////// 224 template <typename T1, typename T2> 225 INLINE 226 static T1 AlignUp(T1 value, T2 alignment) 227 { 228 return AlignDown(value + T1(alignment - 1), alignment); 229 } 230 231 ////////////////////////////////////////////////////////////////////////// 232 /// Align up to specified alignment 233 /// Note: IsPow2(alignment) MUST be true 234 ////////////////////////////////////////////////////////////////////////// 235 template <typename T1, typename T2> 236 INLINE 237 static T1* AlignUp(T1* value, T2 alignment) 238 { 239 return AlignDown(PtrAdd(value, alignment - 1), alignment); 240 } 241 242 ////////////////////////////////////////////////////////////////////////// 243 /// Helper structure used to access an array of elements that don't 244 /// correspond to a typical word size. 245 ////////////////////////////////////////////////////////////////////////// 246 template<typename T, size_t BitsPerElementT, size_t ArrayLenT> 247 class BitsArray 248 { 249 private: 250 static const size_t BITS_PER_WORD = sizeof(size_t) * 8; 251 static const size_t ELEMENTS_PER_WORD = BITS_PER_WORD / BitsPerElementT; 252 static const size_t NUM_WORDS = (ArrayLenT + ELEMENTS_PER_WORD - 1) / ELEMENTS_PER_WORD; 253 static const size_t ELEMENT_MASK = (size_t(1) << BitsPerElementT) - 1; 254 255 static_assert(ELEMENTS_PER_WORD * BitsPerElementT == BITS_PER_WORD, 256 "Element size must an integral fraction of pointer size"); 257 258 size_t m_words[NUM_WORDS] = {}; 259 260 public: 261 262 T operator[] (size_t elementIndex) const 263 { 264 size_t word = m_words[elementIndex / ELEMENTS_PER_WORD]; 265 word >>= ((elementIndex % ELEMENTS_PER_WORD) * BitsPerElementT); 266 return T(word & ELEMENT_MASK); 267 } 268 }; 269 270 // Ranged integer argument for TemplateArgUnroller 271 template <uint32_t TMin, uint32_t TMax> 272 struct IntArg 273 { 274 uint32_t val; 275 }; 276 277 // Recursive template used to auto-nest conditionals. Converts dynamic boolean function 278 // arguments to static template arguments. 279 template <typename TermT, typename... ArgsB> 280 struct TemplateArgUnroller 281 { 282 //----------------------------------------- 283 // Boolean value 284 //----------------------------------------- 285 286 // Last Arg Terminator 287 static typename TermT::FuncType GetFunc(bool bArg) 288 { 289 if (bArg) 290 { 291 return TermT::template GetFunc<ArgsB..., std::true_type>(); 292 } 293 294 return TermT::template GetFunc<ArgsB..., std::false_type>(); 295 } 296 297 // Recursively parse args 298 template <typename... TArgsT> 299 static typename TermT::FuncType GetFunc(bool bArg, TArgsT... remainingArgs) 300 { 301 if (bArg) 302 { 303 return TemplateArgUnroller<TermT, ArgsB..., std::true_type>::GetFunc(remainingArgs...); 304 } 305 306 return TemplateArgUnroller<TermT, ArgsB..., std::false_type>::GetFunc(remainingArgs...); 307 } 308 309 //----------------------------------------- 310 // Integer value (within specified range) 311 //----------------------------------------- 312 313 // Last Arg Terminator 314 template <uint32_t TMin, uint32_t TMax> 315 static typename TermT::FuncType GetFunc(IntArg<TMin, TMax> iArg) 316 { 317 if (iArg.val == TMax) 318 { 319 return TermT::template GetFunc<ArgsB..., std::integral_constant<uint32_t, TMax>>(); 320 } 321 if (TMax > TMin) 322 { 323 return TemplateArgUnroller<TermT, ArgsB...>::GetFunc(IntArg<TMin, TMax-1>{iArg.val}); 324 } 325 SWR_ASSUME(false); return nullptr; 326 } 327 template <uint32_t TVal> 328 static typename TermT::FuncType GetFunc(IntArg<TVal, TVal> iArg) 329 { 330 SWR_ASSERT(iArg.val == TVal); 331 return TermT::template GetFunc<ArgsB..., std::integral_constant<uint32_t, TVal>>(); 332 } 333 334 // Recursively parse args 335 template <uint32_t TMin, uint32_t TMax, typename... TArgsT> 336 static typename TermT::FuncType GetFunc(IntArg<TMin, TMax> iArg, TArgsT... remainingArgs) 337 { 338 if (iArg.val == TMax) 339 { 340 return TemplateArgUnroller<TermT, ArgsB..., std::integral_constant<uint32_t, TMax>>::GetFunc(remainingArgs...); 341 } 342 if (TMax > TMin) 343 { 344 return TemplateArgUnroller<TermT, ArgsB...>::GetFunc(IntArg<TMin, TMax - 1>{iArg.val}, remainingArgs...); 345 } 346 SWR_ASSUME(false); return nullptr; 347 } 348 template <uint32_t TVal, typename... TArgsT> 349 static typename TermT::FuncType GetFunc(IntArg<TVal, TVal> iArg, TArgsT... remainingArgs) 350 { 351 SWR_ASSERT(iArg.val == TVal); 352 return TemplateArgUnroller<TermT, ArgsB..., std::integral_constant<uint32_t, TVal>>::GetFunc(remainingArgs...); 353 } 354 }; 355 356 ////////////////////////////////////////////////////////////////////////// 357 /// Helpers used to get / set environment variable 358 ////////////////////////////////////////////////////////////////////////// 359 static INLINE std::string GetEnv(const std::string& variableName) 360 { 361 std::string output; 362 #if defined(_WIN32) 363 DWORD valueSize = GetEnvironmentVariableA(variableName.c_str(), nullptr, 0); 364 if (!valueSize) return output; 365 output.resize(valueSize - 1); // valueSize includes null, output.resize() does not 366 GetEnvironmentVariableA(variableName.c_str(), &output[0], valueSize); 367 #else 368 char *env = getenv(variableName.c_str()); 369 output = env ? env : ""; 370 #endif 371 372 return output; 373 } 374 375 static INLINE void SetEnv(const std::string& variableName, const std::string& value) 376 { 377 #if defined(_WIN32) 378 SetEnvironmentVariableA(variableName.c_str(), value.c_str()); 379 #else 380 setenv(variableName.c_str(), value.c_str(), true); 381 #endif 382 } 383 384
