🚀 go-pugleaf

>>>>> On 7 Jan 93 19:56:10 GMT, uzun@crash.cts.com (Roger Uzun) said:
Roger> I went to undergraduate school at the Univ of IL(83), and to 
Roger> graduate school at San Diego State Univ.(85).  Both campuses
Roger> had CDC Cyber machines I used in a limited capacity.
Roger> I recall I was impressed with the speeds of the machines
Roger> at the time, but I do not recall the exact models that were
Roger> used.  They were 1's complement machines, and used 60 or perhaps
Roger> it was 63 bit integers.
Roger> I am curious, if anyone knows, what the performance of the
Roger> Cyber series of computers was in the mid 1980's.
Roger> How would their integer or FP performance compare to a
Roger> 50 Mhz 80486, in running a single, CPU intensive task.

I remember old (1972) CDC6400, which needed 0.6us for 60-bit integer
add (register to register). Because 80486 doesn't have 60-bit registers
and only 7 32-bit registers can be used for arithmetic operations, the
old CYBER can show better speed than 50MHz 80486 if most of operations
can be done on its registers and require more than 32-bit precision.
Probably an example may be converting word(s) from binary to octal
or reverse, on CYBER it can be done by straight code without loop and
without processing every byte separately (quess what way :-).
Of course CDC computers made in the 1980'th were much better (10x?).