gem5  v21.1.0.2
crc.hh
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37 
38 #ifndef __BASE_CRC_HH__
39 #define __BASE_CRC_HH__
40 
41 #include "base/bitfield.hh"
42 
43 namespace gem5
44 {
45 
60 template <uint32_t Poly>
61 uint32_t
62 crc32(const uint8_t* data, uint32_t crc, std::size_t size)
63 {
64  uint32_t byte = 0;
65 
66  crc = reverseBits(crc);
67  for (auto i = 0; i < size; i++) {
68  byte = data[i];
69 
70  // 32-bit reverse
71  byte = reverseBits(byte);
72  for (auto j = 0; j <= 7; j++) {
73  if ((int)(crc ^ byte) < 0) {
74  crc = (crc << 1) ^ Poly;
75  } else {
76  crc = crc << 1;
77  }
78  byte = byte << 1;
79  }
80  }
81  return reverseBits(crc);
82 }
83 
84 } // namespace gem5
85 
86 #endif // __BASE_CRC_HH__
data
const char data[]
Definition: circlebuf.test.cc:48
gem5::crc32
uint32_t crc32(const uint8_t *data, uint32_t crc, std::size_t size)
Evaluate the CRC32 of the first size bytes of a data buffer, using a specific polynomium and an initi...
Definition: crc.hh:62
gem5::reverseBits
std::enable_if_t< std::is_integral< T >::value &&sizeof(T) !=1, T > reverseBits(T val, size_t size=sizeof(T))
Takes a value and returns the bit reversed version.
Definition: bitfield.hh:236
gem5::ArmISA::i
Bitfield< 7 > i
Definition: misc_types.hh:66
gem5::ArmISA::j
Bitfield< 24 > j
Definition: misc_types.hh:57
bitfield.hh
gem5
Reference material can be found at the JEDEC website: UFS standard http://www.jedec....
Definition: decoder.cc:40

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