Fixed-point operations

[Maurizio Vitale]

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.

Hope this helps,

	Maurizio

On Dec 31, 2007, at 7:31 AM, Tom St Denis wrote:

> Cristea Bogdan wrote:
>> Is there a library implementing fast fixed-point operations  
>> (addition,
>> multiplication, comparisons)? I have used till now a C++ class, but
>> the fixed-point operations are very slow wrt to their floating-point
>> counterparts.
>>
>>
> Slow on what?  Most big cpus nowadays have very fast FPUs.  On  
> something like an ARM without an FPU fixed point should be quite a  
> bit faster....
>
>