Re: [boost] Math constants for naive and gurus? - which constants do you want?

From: Peter Dimov (pdimov_at_[hidden])
Date: 2001-10-25 07:50:57

From: "Greg Colvin" <gcolvin_at_[hidden]>
> No, I haven't done any timings.  The main point was just that there need
> be no overhead for the templates compared to a literal constant.  But I
> am confident that, ceteris paribus,
> 
>     mov     DWORD PTR _pi_function$[esp+60], 1413754136
>     mov     DWORD PTR _pi_function$[esp+64], 1074340347
> 
> will be faster than
> 
>     mov     eax, DWORD PTR _Pi$S188
>     mov     DWORD PTR _pi_constant$[esp+40], eax
>     mov     ecx, DWORD PTR _Pi$S188+4
>     mov     DWORD PTR _pi_constant$[esp+52], ecx

I have learned to not be confident about such things. :-)

--
Peter Dimov
Multi Media Ltd.