Re: S/360

Further to my note about hex float times,
you will observe from the times of
AE of 19.20µS and AU of 18.96µS
that the time for post-normalization was 0.24µS
Compare that with single bit ****fts using SLL
of up to 21 bits, say, of 0.48µS per bit --
Equals 10µS.
    Thus, we could expect that single-bit ****fts for AE
would add 20µS (recall that pre-normalization
and post normalization are required for add and subtract)
to the instruction time.  Thus, instead of AE taking
19.20µS, it would take

19.20 - 0.48 + 20 = 38.82µS

which is nearly double the time taken for hex of 19.20µS.