in gemmology.h [1167:1174]
void Engine<Arch>::SelectColumnsB(const int8_t *input, int8_t *output,
size_t rows, const IntegerTy *cols_begin,
const IntegerTy *cols_end) {
using batch8 = xsimd::batch<int8_t, Arch>;
SelectColumnsOfB(reinterpret_cast<const batch8 *>(input),
reinterpret_cast<batch8 *>(output), rows, cols_begin,
cols_end);
}