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Thomas Harte 2020-01-19 20:32:58 -05:00
parent 5391a699a4
commit 4b2c68c3d3
1 changed files with 4 additions and 0 deletions
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NumberTheory/LFSR.hpp
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@ -47,6 +47,10 @@ template <typename IntType = uint64_t, IntType polynomial = LSFRPolynomial<IntTy
} }
} }
/*!
Advances the LSFR, returning either an @c IntType of value @c 1 or @c 0,
determining the bit that was just shifted out.
*/
IntType next() { IntType next() {
auto result = value_ & 1; auto result = value_ & 1;
value_ = (value_ >> 1) ^ (result * polynomial); value_ = (value_ >> 1) ^ (result * polynomial);