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Issue 1341423002: Reflow comments to use the full width. (Closed) Base URL: https://chromium.googlesource.com/native_client/pnacl-subzero.git@master
Patch Set: Fix spelling and rebase Created 5 years, 3 months ago
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1 //===- subzero/src/IceRNG.h - Random number generator -----------*- C++ -*-===// 1 //===- subzero/src/IceRNG.h - Random number generator -----------*- C++ -*-===//
2 // 2 //
3 // The Subzero Code Generator 3 // The Subzero Code Generator
4 // 4 //
5 // This file is distributed under the University of Illinois Open Source 5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details. 6 // License. See LICENSE.TXT for details.
7 // 7 //
8 //===----------------------------------------------------------------------===// 8 //===----------------------------------------------------------------------===//
9 /// 9 ///
10 /// \file 10 /// \file
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45 /// it gets shifted by 48 before merging. 45 /// it gets shifted by 48 before merging.
46 explicit RandomNumberGenerator(uint64_t Seed, 46 explicit RandomNumberGenerator(uint64_t Seed,
47 RandomizationPassesEnum RandomizationPassID, 47 RandomizationPassesEnum RandomizationPassID,
48 uint64_t Salt = 0); 48 uint64_t Salt = 0);
49 uint64_t next(uint64_t Max); 49 uint64_t next(uint64_t Max);
50 50
51 private: 51 private:
52 uint64_t State; 52 uint64_t State;
53 }; 53 };
54 54
55 /// This class adds additional random number generator utilities. The 55 /// This class adds additional random number generator utilities. The reason for
56 /// reason for the wrapper class is that we want to keep the 56 /// the wrapper class is that we want to keep the RandomNumberGenerator
57 /// RandomNumberGenerator interface identical to LLVM's. 57 /// interface identical to LLVM's.
58 class RandomNumberGeneratorWrapper { 58 class RandomNumberGeneratorWrapper {
59 RandomNumberGeneratorWrapper() = delete; 59 RandomNumberGeneratorWrapper() = delete;
60 RandomNumberGeneratorWrapper(const RandomNumberGeneratorWrapper &) = delete; 60 RandomNumberGeneratorWrapper(const RandomNumberGeneratorWrapper &) = delete;
61 RandomNumberGeneratorWrapper & 61 RandomNumberGeneratorWrapper &
62 operator=(const RandomNumberGeneratorWrapper &) = delete; 62 operator=(const RandomNumberGeneratorWrapper &) = delete;
63 63
64 public: 64 public:
65 uint64_t operator()(uint64_t Max) { return RNG.next(Max); } 65 uint64_t operator()(uint64_t Max) { return RNG.next(Max); }
66 bool getTrueWithProbability(float Probability); 66 bool getTrueWithProbability(float Probability);
67 explicit RandomNumberGeneratorWrapper(RandomNumberGenerator &RNG) 67 explicit RandomNumberGeneratorWrapper(RandomNumberGenerator &RNG)
68 : RNG(RNG) {} 68 : RNG(RNG) {}
69 69
70 private: 70 private:
71 RandomNumberGenerator &RNG; 71 RandomNumberGenerator &RNG;
72 }; 72 };
73 73
74 /// RandomShuffle is an implementation of std::random_shuffle() that 74 /// RandomShuffle is an implementation of std::random_shuffle() that doesn't
75 /// doesn't change across stdlib implementations. Adapted from a 75 /// change across stdlib implementations. Adapted from a sample implementation
76 /// sample implementation at cppreference.com. 76 /// at cppreference.com.
77 template <class RandomIt, class RandomFunc> 77 template <class RandomIt, class RandomFunc>
78 void RandomShuffle(RandomIt First, RandomIt Last, RandomFunc &&RNG) { 78 void RandomShuffle(RandomIt First, RandomIt Last, RandomFunc &&RNG) {
79 for (auto i = Last - First - 1; i > 0; --i) 79 for (auto i = Last - First - 1; i > 0; --i)
80 std::swap(First[i], First[RNG(i + 1)]); 80 std::swap(First[i], First[RNG(i + 1)]);
81 } 81 }
82 82
83 } // end of namespace Ice 83 } // end of namespace Ice
84 84
85 #endif // SUBZERO_SRC_ICERNG_H 85 #endif // SUBZERO_SRC_ICERNG_H
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