🚀 go-pugleaf

Michael.Malak@halluc.com (Michael Malak) writes:

[...stuff deleted...]

>Does anyone have any information about how fast the i860 can do an FFT, either
>theoretical or measured?  I'm especially interested in how it compares against
>the C30, the 96000 and the 56001.  Because since there don't seem to be any 386
>or 486 motherboards out there with DSPs on them, the one from Happauge with the
>i860 on it might be worth a look.

I have seen advertised numbers from several i860 based array processor 
vendors in the range of 0.75 to 0.8 msec for a 1024-pt complex FFT.
Although I have not timed FFT code on the i860, I believe these numbers
are reasonable.

An EDN article in the 7 November 91 issue has a comparison of various
32-bit floating point DSP's, including FFT benchmarks.  Unfortunately,
I believe this article misquotes the i860XP performance, listing it
as 76 msec instead of the more reasonable value of 0.76 msec for the
1024-pt complex FFT.  A word of caution though, these numbers are only 
achievable with hand-coded routines. 

Miguel Oyarzun
moyarzun@bbn.com