27 Jul
2010
27 Jul
'10
6:29 p.m.
At Tue, 27 Jul 2010 17:17:18 +0100, John Maddock wrote:
This would be ideal - but doesn't accumulator already use 'sum' so it would change behaviour of existing programs?
Technically, of course it would, but aren't they getting the wrong answer currently?
I tend to agree with Dave, so long as the kahan sum accumulator is a drop-in replacement for what we already have. Does it Just Work for integral types, too?
It's not required for integral types as these don't suffer from cancelation errors.
And I'm loathe to disagree with John and Matthias on matters of numerics. -- Dave Abrahams BoostPro Computing http://www.boostpro.com