if (PicoPicohw.fifo_line_bytes >= (1<<16)) {
PicoPicohw.fifo_bytes -= PicoPicohw.fifo_line_bytes >> 16;
PicoPicohw.fifo_line_bytes &= 0xffff;
if (PicoPicohw.fifo_line_bytes >= (1<<16)) {
PicoPicohw.fifo_bytes -= PicoPicohw.fifo_line_bytes >> 16;
PicoPicohw.fifo_line_bytes &= 0xffff;