59. Absolute Value

Compute the absolute value of a signed 8-bit input a using a user-written function.

Requirements

• Module: abs8_func
• Input: a is signed [7:0]
• Output: abs[7:0]
• Write a function abs8(x) that returns the absolute value of x.

Behavior

• Absolute value of a = (a < 0) ? -a : a
• Edge note: for a = -128 (8'h80), two’s complement wraps (result stays 8'h80).