gem5  v21.1.0.2
random.cc
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40 
41 #include "base/random.hh"
42 
43 #include <sstream>
44 
45 #include "base/logging.hh"
46 #include "sim/serialize.hh"
47 
48 namespace gem5
49 {
50 
52 {
53  // default random seed
54  init(5489);
55 }
56 
57 Random::Random(uint32_t s)
58 {
59  init(s);
60 }
61 
63 {
64 }
65 
66 void
67 Random::init(uint32_t s)
68 {
69  gen.seed(s);
70 }
71 
72 void
74 {
75  panic("Currently not used anywhere.\n");
76 
77  // get the state from the generator
78  std::ostringstream oss;
79  oss << gen;
80  std::string state = oss.str();
81  paramOut(cp, "mt_state", state);
82 }
83 
84 void
86 {
87  panic("Currently not used anywhere.\n");
88 
89  // the random generator state did not use to be part of the
90  // checkpoint state, so be forgiving in the unserialization and
91  // keep on going if the parameter is not there
92  std::string state;
93  if (optParamIn(cp, "mt_state", state)) {
94  std::istringstream iss(state);
95  iss >> gen;
96  }
97 }
98 
100 
101 } // namespace gem5
gem5::Random::serialize
void serialize(CheckpointOut &cp) const override
Serialize an object.
Definition: random.cc:73
serialize.hh
gem5::CheckpointIn
Definition: serialize.hh:68
random.hh
gem5::Random::~Random
~Random()
Definition: random.cc:62
gem5::Random::gen
std::mt19937_64 gen
Definition: random.hh:69
gem5::ArmISA::s
Bitfield< 4 > s
Definition: misc_types.hh:561
gem5::Random
Definition: random.hh:61
gem5::optParamIn
bool optParamIn(CheckpointIn &cp, const std::string &name, T &param, bool do_warn=true)
This function is used for restoring optional parameters from the checkpoint.
Definition: serialize.hh:357
gem5::paramOut
void paramOut(CheckpointOut &cp, const std::string &name, ExtMachInst const &machInst)
Definition: types.cc:40
gem5::Random::unserialize
void unserialize(CheckpointIn &cp) override
Unserialize an object.
Definition: random.cc:85
gem5::Random::Random
Random()
Definition: random.cc:51
logging.hh
gem5::CheckpointOut
std::ostream CheckpointOut
Definition: serialize.hh:66
gem5
Reference material can be found at the JEDEC website: UFS standard http://www.jedec....
Definition: decoder.cc:40
gem5::Random::init
void init(uint32_t s)
Definition: random.cc:67
gem5::random_mt
Random random_mt
Definition: random.cc:99
panic
#define panic(...)
This implements a cprintf based panic() function.
Definition: logging.hh:177

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