CDS does serialization, then an interlocked update and then
serialization.

LM does not do either.

Later,
Steve Thompson

-----Original Message-----
From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On
Behalf Of Binyamin Dissen
Sent: Thursday, July 27, 2006 10:12 AM
To: [email protected]
Subject: Doing a LM of two words on a double word bounday - is it
serialized?

I would like to guarantee a concurrent load of two words on a double
word
boundary.

Will LM serialize the doubleword?

Or must I something hokey like a CDS which appears to do a concurrent
load if
the result is not equal.
<snip>l

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