Maurizio Vitale wrote:
The OP asked for fixed-point arithmetic, not floating point.
The only two libraries I can recommend are the one included in SystemC
(very complete
in terms of overflow/quantization control, but slow) and one offered
as open source by Mentor Graphics
at
http://www.mentor.com/products/esl/high_level_synthesis/ac_datatypes.cfm.
This second one is a very useful subset of the SystemC library and is
_very_ fast.
The OP said "wrt to floating point counterparts."
To which I said on big cpus [e.g. desktop cores] FPUs are very fast.
So if the OP is running stuff on say a Core 2 Duo then yeah, the FPU
will be faster. If the OP is on an ARM without an FPU then fixed point
should be the winner (especially given the free shifting/rotation...)
Tom
