> [The shifter is] bidirectional (with buffers/drivers on both sides), so you put the bits through one way to shift left and the other way to shift right. Wait

> [The shifter is] bidirectional (with buffers/drivers on both sides), so you put the bits through one way to shift left and the other way to shift right. Wait, really? I'm used to seeing mux circuits like the following, which incur a wee bit of gate delay per stage. http://www.vlsitechnology.org/html/cells/vsclib013/mxi2.html http://www.vlsitechnology.org/html/cells/vsclib013/mxi2.html http://www.vlsitechnology.org/html/cells/vsclib013/mxn2.html http://www.vlsitechnology.org/html/cells/vsclib013/mxn2.html