x86-64 support

[Doug Rabson]

On Monday 28 April 2003 1:54 am, Oliver Fromme wrote:
> Narvi <narvi at haldjas.folklore.ee> wrote:
>  > On Sat, 26 Apr 2003, M. Warner Losh wrote:
>  > > In message: <20030427064014.H40030-100000 at haldjas.folklore.ee>
>  > >
>  > >             Narvi <narvi at haldjas.folklore.ee> writes:
>  > > : option  USE_PI_DIGITS       100
>  > >
>  > > Only if you could implement it with integer math :-)
>  >
>  > where's the problem in that ? most mp libs use integer arithmetic,
>  > and x86-64 gives you 64x64->128 bit widening multiplies 8-)
>
> You don't need that; the digits of pi can be calculated
> quite easily with integer math.  This snippet is from my
> signature collection:
>
> int f[9800],b,c=9814,g,i;long
> a=1e4,d,e,h;main(){for(;b=c,c-=14;i=printf(
> "%04d",e+d/a),e=d%a)while(g=--b*2)d=h*b+a*(i?f[b]:a/5),h=d/--g,f[b]=d
>%g;}
>
> Of course it doesn't comply with style(9), otherwise it
> wouldn't fit into two lines.  Prettifying (de-obfuscating)
> it to make it style(9)-compliant is left as an exercise to
> the reader.  ;-)

Doesn't appear to work. When I run this, it prints '1877' followed by 
lots of zeros...

-- 
Doug Rabson				Mail:  dfr at nlsystems.com
					Phone: +44 20 8348 6160