Re: Best processors for trig?
- From: mojaveg@xxxxxxxxxxxxxxxxxxxxxxxxxxxxx (Everett M. Greene)
- Date: Sat, 31 Mar 2007 11:09:56 PST
Tim Wescott <tim@xxxxxxxxxxxxxxxx> writes:
Mike Noone wrote:
Hi - I was just wondering, are there any processors out there thatA floating point DSP, as noted.
have been optimized for trig operations? I'm hoping to find a
processor that can do trig ops (sin, cos, tan, asin, acos, atan, etc.)
quickly. The faster the better. I would really like to be able to do
such operations in the single digit microsecond range or less, though
that's probably a longshot. I'm looking for floating point values -
ideally in the C data type "double". Does anything like this exist?
Ideally in a non-BGA package, as I hate debugging the little buggers.
Pentium-class x86 processors, although that's stretching the idea of
"embedded" a bit.
Probably PowerPC architecture chips, at least the ones with FPUs (look
carefully, however, I bet there are ones with simple FPUs and others
with complex FPUs).
Some of the bigger fixed-point DSPs may be able to do this -- I know
that TI's '28xx family will do floating point quite efficiently, but (a)
I know they do it by leaving out some of the corner-case testing for
exceptions and (b) I don't know how this translates to trig performance.
Has anybody ever seen the execution times for the trig
functions for say the 68K math coprocessor? Also, are
any accuracy info given?
.
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- From: Mike Noone
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- From: Tim Wescott
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