Ref: Your note of 17 August 2017, 09:00:52 EDT It is there in the book (SA22-7832-09, second sentence in the last paragraph before the Resulting Condition Code heading):
When the length of an operand is zero, no access exceptions for that operand are recognized. Charles Mills wrote: > I don't see this explicitly in the PoOp. Is my recollection correct? That > for a "pure clearing" MVCL (source length zero, destination length non-zero) > the contents of source address register R2 are not significant, and a > specification or access exception on the source address is not possible? Jonathan Scott HLASM IBM UK Labs, Hursley
