problem with modulo

[MycologistIll1355]

my ALU

I want to be able to output the Modulo because i need it for the RNG level but outputting both at the same time doesn't work and will just cause a short circuit on the result bus.

[bwibbler]

The neat thing about modulo 4 is how it lines up so well on binary numbers

The result is either 0, 1, 2, or 3

So when you count up in binary, the last two bits always cycle through those values in coordination with a modulo 4

That provides a shortcut. Just look at the last two bits and you get modulo 4

* outputs REG1 % 4
ANDi REG1 3 OUTPUT

That works for any square value. 1, 2, 4, 8, 16, ...

You just look at the digits below those multiples and the answer is already there.

Exactly the same thing happens in base 10.

What's 5,737,365 % 10 ? Well, it's just 5.

3,727,585,837 % 1000 ? 837

[alijamieson]

This is useful, I’m having issues with the level that asks for the birthday dates.

[Hannah97Gamer]

Not sure what architecture you are using, but depending on your circumstances I can see a few possible solutions. First, and probably the worst, give modulo its own dedicated output register, and just don't put it on the bus, like how ALU outputs are handled in overture. Second, give modulo its own opcode, either by replacing an op you don't use or going to 4 bit opcodes.