Hi Leopold Toetsch,
>> PI is (very) approximately:
> 3.141590653589694692726652647252194583415985107421875000000000
> ^^^^^
> 3.141592653589793238462643383279502884197169399375105820974944
>
> You might probably want to run more iterations ;) And you'll never get
> 60 digits out of long doubles.
I appreciate that Leopold. I thought the zeros indicated where the stored
value cuts off. But with 52 significant figures at ~3.3 bits per figure
that's about 172 bits, which indicates they would have to be 256 bit
floats when including the exponent (my mistake in calling them 128 bit)!
In other words sprintf is printing trailing garbage:
.sub _main
set N1, 2.0
set N2, 3.0
div N1, N1, N2
new P0, .PerlArray
set P0, 1
set P0[0], N1
sprintf S0, "%.60f\n", P0
print S0
end
.end
On the CVS version I compiled this prints:
0.666666666666666629659232512494781985878944396972656250000000
On this win32 release (running on a different machine):
http://www.jwcs.net/developers/perl/pow/download/pow-0.1.1-release.zip
parrot prints:
0.666666666666666630000000000000000000000000000000000000000000
Regards,
Adam
