David Andrews wrote:
On Thu, 2009-04-23 at 10:44 -0400, Binyamin Dissen wrote:
As there is no reason to code a BCR 15,0
Is that really true? We don't have the M91/195 (and their "imprecise
interrupts") to kick around anymore, but is there any other legitimate
use for serializing the pipeline? Why would IBM carry this side-effect
forward for BCR [nonzero],0?
It's not "[nonzero],0", it's "15,0".
SRCHFOR 'BCR 15,0' in SYS1.SHASSRC for some examples. (I know this because I
once had a machine that didn't serialize on that instruction and it took me a
bit short of forever to determine why HASPNUC 0C4'd on rare occasion.)
Bob
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