Re: [boost] fixed pt binary lib

From: Michael Marcin (mike.marcin_at_[hidden])
Date: 2008-07-31 15:20:59

Daniel Frey wrote:
> On Thu, 2008-07-31 at 12:16 -0500, Michael Marcin wrote:
>>
>> Be sure to check the size of your type with your compiler. Some embedded 
>> and DSP compilers in the past made types that derive from operators 
>> larger. Although I think that was partially due to a operators bug that 
>> was fixed a long time ago.
> 
> AFAIK that's not a bug in the operators library, but an inefficiency in
> the compiler's ABI (the EBO actually, which misses some optimization
> opportunities for multiply inheritance from empty base classes).

I was referring to http://svn.boost.org/trac/boost/ticket/979 which bit 
me on a project where we had a fixed-point 3 coordinate vector which had 
operators which contained a fixed-point types which had operators.

Thanks,

Michael Marcin