At 17:31 -0400 on 08/07/2009, Bill Fairchild wrote about Re: z10 and overlapping/destructive moves:

It certainly can't hurt to change the MVI/MVC to a single instruction:
     MVC   254(3,120),=120c' '
And, if possible, align the 120c' ' on at least a double word boundary.

Bill Fairchild

I think that should be MVC   254(120,3),=120c' '

A MVCL might also do the job (if you have the 4 needed registers free) and set the from length and location to 0 with x"20" as the fill character.

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