On 2013-12-21, at 05:51, John Gilmore wrote: > EJ's macro can of course be written in the form > > MACRO , > &LABEL DIAG &R1,&R2,&I1 > &LABEL LA &R1,&I1.(&R2.,0) Diagnose > ORG &LABEL > DC X'83' > ORG , > MEXIT , > MEND , > > and this form, which delegates the location-counter arithmetic to the > assembler, seems to me to be at once clearer and less error-prone. > Agreed.
> Dijkstra's epigoni have conditioned many people to avoid the use of > labels whenever possible, even at the expense of real ugliness, not > present here; but the use of an already present label in this way > seems to me to be entirely benign. Moreover, their judicious use > often makes it possible to avoid what Tony Harminc has just called > "fancier ORGs". > Agreed. But the ORG without argument may not do what you desire: It sets the location counter to the previous highwater mark, which may, because of prior ORGs, be elsewhere than the end of the LA. -- gil
