sdrangel/modems/m17/Convolution.h

27 wiersze
442 B
C++

// Copyright 2020 Mobilinkd LLC.
#pragma once
#include <bit>
#include <cstdint>
#include <cstddef>
#include "Util.h"
namespace mobilinkd
{
inline constexpr uint32_t convolve_bit(uint32_t poly, uint32_t memory)
{
return popcount(poly & memory) & 1;
}
template <size_t K, size_t k = 1>
inline constexpr uint32_t update_memory(uint32_t memory, uint32_t input)
{
return (memory << k | input) & ((1 << (K + 1)) - 1);
}
} // mobilinkd