Silicon to Scripting 9
Equal to Zero
Should output 1 if and only if all bits in the input are 0.
We can rephrase the problem to
Output a 0 if any bits are 1
Which seems a bit confusing, but we can solve the opposite problem and invert the final output.
Output a 1 if any bits are 1
Well, that’s just a big OR gate
And all we need to do now is invert the output of the final OR.
Less than Zero
Based on the encoding scheme we picked, checking if a number is less than zero is a very easy thing to do. The highest (leftmost) bit is where the information for positive/negative is, so we can just connect that one to the output.
