presto-rcfile/src/main/java/io/prestosql/rcfile/binary/FloatEncoding.java/FloatEncoding/decodeValueInto
class FloatEncoding:    @Override
    public void decodeValueInto(BlockBuilder builder, Slice slice, int offset, int length)
    {
        int intBits = slice.getInt(offset);

        // the file format uses big endian
        type.writeLong(builder, Integer.reverseBytes(intBits));
    }