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keep non-bitpacked BCH decoder as reference

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This commit is contained in:
Ahmet Inan 2018-09-22 10:52:55 +02:00
commit deb6ede15f
2 changed files with 74 additions and 18 deletions
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45
tests/bch_decoder_test.cc
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@ -67,6 +67,51 @@ int main()
delete decode;
delete instance;
}
if (0) {
// NASA INTRO BCH(15, 5) T=3
typedef CODE::GaloisField<4, 0b10011, uint8_t> GF;
typedef CODE::BoseChaudhuriHocquenghemDecoderReference<6, 1, 5, GF> BCH;
GF instance;
BCH decode;
uint8_t target[BCH::N] = { 1, 1, 0, 0, 1, 0, 0, 0, 1, 1, 1, 1, 0, 1, 0 };
uint8_t code[BCH::N];
for (int i = 0; i < BCH::N; ++i)
code[i] = target[i];
std::uniform_int_distribution<uint8_t> distribution(0, BCH::N-1);
auto noise = std::bind(distribution, generator);
for (int i = 0; i < 3; ++i)
code[noise()] ^= 1;
decode(reinterpret_cast<GF::ValueType *>(code));
for (int i = 0; i < BCH::N; ++i)
assert(code[i] == target[i]);
}
if (0) {
// DVB-S2 FULL BCH(65535, 65343) T=12
typedef CODE::GaloisField<16, 0b10000000000101101, uint16_t> GF;
typedef CODE::BoseChaudhuriHocquenghemDecoderReference<24, 1, 65343, GF> BCH;
GF *instance = new GF();
BCH *decode = new BCH();
uint16_t *target = new uint16_t[BCH::N];
for (int i = 0, s = 0; i < BCH::K; ++i, s=(s*(s*s*51767+71287)+35149)&0xffffff)
target[i] = (s^=s>>7)&1;
uint16_t parity[BCH::NP] = { 0, 1, 1, 1, 0, 0, 0, 0, 1, 1, 1, 0, 1, 1, 0, 1, 0, 0, 1, 0, 0, 1, 1, 1, 1, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 1, 1, 0, 1, 1, 0, 1, 1, 0, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 0, 1, 0, 0, 1, 1, 1, 1, 0, 0, 1, 1, 1, 1, 1, 0, 1, 0, 1, 0, 1, 0, 0, 1, 1, 1, 0, 0, 0, 1, 0, 1, 0, 0, 1, 1, 0, 1, 1, 0, 1, 0, 1, 1, 0, 1, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0, 0, 0, 0, 1, 1, 0, 1, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 1, 1, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 0, 1, 0, 1, 1, 0, 0, 1, 0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 1, 1, 1, 1, 1, 0, 0, 1, 1, 1, 0, 1, 0, 1, 0, 1, 1, 0, 0 };
for (int i = 0; i < BCH::NP; ++i)
target[BCH::K+i] = parity[i];
uint16_t *code = new uint16_t[BCH::N];
for (int i = 0; i < BCH::N; ++i)
code[i] = target[i];
std::uniform_int_distribution<uint16_t> distribution(0, BCH::N-1);
auto noise = std::bind(distribution, generator);
for (int i = 0; i < 12; ++i)
code[noise()] ^= 1;
(*decode)(reinterpret_cast<GF::ValueType *>(code));
for (int i = 0; i < BCH::N; ++i)
assert(code[i] == target[i]);
delete[] target;
delete[] code;
delete decode;
delete instance;
}
std::cerr << "Bose Chaudhuri Hocquenghem Decoder test passed!" << std::endl;
return 0;
}