Why no greater than (>) contact in DirectSoft?

[Div_by_zero]

I'm almost embarrassed to ask this question as I'm sure the answer is going to be incredibly simple and obvious, but why is there no greater than (>) contact in DirectSoft?

For what it's worth, I'm running 6.1a.

Thanks for any replies.

[rlp122]

Koyo decided not to include one.  No idea why, it's just not there.  I used to wonder the same thing myself.  After the first ten years of using DirectLogic, I quit worrying about it.  The second ten years has got me to quit worrying about a lot of other things as well.  :)

[IO_Rack]

I'm not sure why it's not included either. I do know a common mistake when comparing a value is to miss comparison for the Equality. Therefore when it's necessary (on other platforms), you'll need to compare:

<= and >

or

< and >=

By omitting the > it'll be impossible to make this mistake. That's the only reason I can think of.

[rocket]

To me, > is virtually the same as >=.

You set >= one higher than what you would have set > and it works the same.

So >10 would be >= 11. At 10, neither do nothing and at 11 both are triggered.

So > would effectively be a duplicate command and therefore why have it if you are after efficiency.

Anyhow, that's my take on it.

[b_carlton]

I worked with some microprocessors. A comparison between numbers were often performed by subtracting them and utilizing result flags. For example if we subtracted A from B and then saw that the negative result flag was set I could say that A > B, if it wasn't set then A ≤ B. A zero flag would indicate equality but the state of < would take more operations. I'm just guessing but I think it is similar to this.

Many times you can achieve the other comparisons by swapping the arguments but many times a constant can't be on the left hand side. If needed load the constant into a V register.

Edited January 7, 2019 by b_carlton