Function check_encoding

cpp/test/quantize/test_bolt.cpp:220–236

}

void check_encoding(int nrows, const ColMatrix<uint8_t>& encoding_out) {

    // number of rows in output must be a multiple of 32, and >32 would
    // require us to rewrite this to look at indices within each block
    // instead of letting column-major indexing handle everything for us
    size_t nrows_out = encoding_out.rows();
    REQUIRE(nrows_out == 32);
    
    for (int i = 0; i < nrows; i++) {
        for(int m = 0; m < 2 * M; m++) {
            // indices are packed into upper and lower 4 bits
            int byte = encoding_out(i, m / 2);
            int idx = m % 2 ? byte >> 4 : byte & 0x0F;
            REQUIRE(idx == m + (i % 5)); // i % 5 from how we designed mat
        }
    }
}

TEST_CASE("bolt_encode", "[mcq][bolt]") {
    auto centroids = create_bolt_centroids(1);