14. Logical Shifter

Design an 8-bit logical shifter that outputs both the left-shifted and right-shifted versions of its input by a variable amount.

Requirements

• Module name: shift8
• Inputs:
  • A[7:0] — data to shift
  • shamt[2:0] — shift amount (0–7)
• Outputs:
  • SHL[7:0] — logical left shift, A << shamt
  • SHR[7:0] — logical right shift, A >> shamt

Notes

• Use logical shifts only (<<, >>).
• Vacated bits must be filled with 0; bits shifted out are discarded.
• If shamt = 0, then SHL = SHR = A.

Worked examples

For A = 8'b1010_1100 (0xAC):