On Thu, 17 Jul 2014 21:06:24 +0000, Gainsford, Allen wrote: >> Sequence could be: >> LA 1,Pattern+L'Pattern-1 (see below) >> EDMK Pattern,Value >> B '1110',Positive >> BCTR 1,0 >> MVI 0(1),C'-' >> Positive DS 0H > >Is it worth saving an instruction by replacing the BCTR/MVI with: > MVIY -1(1),C'-' >...?
Yes, provided that you don't have to run on a processor without the Long Displacement facility. Especially since AFAIK there will be an Address Generation Interlock. -- Tom Marchant
