(42S) GCD

[Dieter]

(07-12-2016 03:48 AM)Joe Horn Wrote:  As others have recently posted in parallel discussions, the GCD routine in the PPC ROM is probably the shortest and fastest possible:

Also posted in the other GCD thread:
You can get it one step shorter (but with the same byte count):

Code:

LBL d
STO Z
MOD
X≠0?
GTO d
+
END

Note to HP42 users: STO Z is STO ST Z.

Dieter