Shuffle controls per whitespace mask, for the vector paths. More...

#include <fastx_sequence_file.hpp>

Public Member Functions
	compact_shuffle_table () noexcept

Public Attributes
uint8_t	control [256][16]

uint8_t	kept [256]

Detailed Description

Shuffle controls per whitespace mask, for the vector paths.

Indexed by one half block's mask, an entry lists the positions of the bytes it keeps followed by stop markers. Both the x86 shuffle and the aarch64 table lookup read the same table, and a stop marker gathers nothing on either.

Definition at line 1016 of file fastx_sequence_file.hpp.

Constructor & Destructor Documentation

◆ compact_shuffle_table()

cuddl::detail::compact_impl::compact_shuffle_table::compact_shuffle_table ( )

inlinenoexcept

Definition at line 1019 of file fastx_sequence_file.hpp.

                                     {
        for (int mask = 0; mask < 256; ++mask) {
            int at = 0;
            for (int bit = 0; bit < 8; ++bit) {
                if ((mask & (1 << bit)) == 0) control[mask][at++] = static_cast<uint8_t>(bit);
            }
            for (; at < 16; ++at) control[mask][at] = 0x80U;
            kept[mask] = static_cast<uint8_t>(8 - __builtin_popcount(static_cast<unsigned>(mask)));
        }
    }

Member Data Documentation

◆ control

uint8_t cuddl::detail::compact_impl::compact_shuffle_table::control[256][16]

Definition at line 1017 of file fastx_sequence_file.hpp.

◆ kept

uint8_t cuddl::detail::compact_impl::compact_shuffle_table::kept[256]

Definition at line 1018 of file fastx_sequence_file.hpp.

The documentation for this struct was generated from the following file:

fastx_sequence_file.hpp