8 bit barrel shifter version A

3 ticks, excluding input/output bus
left shift, right shift, arithmetic right shift, rotate.

blue: data input, inverted, 15ss required

purple: shift amount input, normal, 15ss required.
keep in mind that doing a right shift by X is the same as doing a left shift by -X. please input the 2s complement if you want right shifts. 

yellow: output, normal, low output

red: 
- disable left shift, use when only doing right shift
- disable right shift, use when only doing left shift
- disable barrelshifter
- disable sign extend, for use with arithmetic right shift