Don Higgins wrote:
Steve - I don't remember seeing I' as opcode in the current z/Arch POP. <G>

Tony, all - The idea is to code a routine that will process a string of
bytes at some address for a given length and calculate the total bits
in the string as I assume the new instruction coming ON Z196 will do.

I coded and tested a version yesterday that has a 4 instruction BXLE loop.
But I'm curious to see if there are faster versions perhaps with some
minimum length and trailer byte restrictions.

Don Higgins
[email protected]


Don,

My point was: do you mean count the number of bits with a
value of '1', or the number of bits in a string of bytes?
The number of bits in a string of bytes is 8 bits * length
of the string, so I didn't see the reason for the problem.


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