From: "Rob van der Heij" <rvdh...@gmail.com> Sent: Tuesday, 17 January 2012 2:37 AM
Having the CLC near the EX helps for cache. I also like to assemble it in-line because the right USINGs apply. We noticed that it is attractive to run over the CLC (with the length byte 0 as assembled) and then EX behind your back to do the real thing. More attractive than branch over the target if the instruction lets you.
A convenient place for the subject instruction is immediately after a B instruction, thus avoiding the need to execute CLC or MVC twice. -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean.
