Chris Craddock and Ed Jaffe have guessed that there will be no retrofitting
of the new z9 instructions, and they may well be right, but it is important
to remember that IBM will consult its own convenience in deciding what to
do. (It has retrofitted other such instruction sets and could do so again.)
Meanwhile, I have found the new FLOGR instruction---It finds the leftmost
instance of a '1'b bit in a register doubleword---very convenient indeed for
scanning bit tables; and I have elected to use it when possible asnd to
provide an eponymous macro that does the same thing, albeit much more
slowly, on platforms that do not make FLOGR available.
This is my usual approach to such problems, and it seems to me to be
preferable to the crackpot realist scheme of avoiding new instructions until
'everyone' has them available.
John Gilmore
Ashland, MA 01721
USA
_________________________________________________________________
Express yourself instantly with MSN Messenger! Download today - it's FREE!
http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/
----------------------------------------------------------------------
For IBM-MAIN subscribe / signoff / archive access instructions,
send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO
Search the archives at http://bama.ua.edu/archives/ibm-main.html
