X-Git-Url: https://git.ucc.asn.au/?a=blobdiff_plain;f=irc%2F%23ipdf.log;h=f1a939e3844559a6fa109edde1fe55d76b0b28ad;hb=eeeaaae3227fd4427a78f4ab75e8a4f414b3626d;hp=89f71a4840cc7f60f482ec3d8d161e5f46e5070c;hpb=6f5f55579b969668419ea925e07f6c86442ef582;p=ipdf%2Fdocuments.git

diff --git a/irc/#ipdf.log b/irc/#ipdf.log
index 89f71a4..f1a939e 100644
--- a/irc/#ipdf.log
+++ b/irc/#ipdf.log
@@ -793,3 +793,25 @@
 17:35 <@matches> The CQM lecturer for physics found a bug in Mathematica's number representation once that she showed us
 17:35 <@matches> Apparently she reported it years ago and it's still there
 17:36 <@matches> This segued nicely into why we should learn fortran
+--- Day changed Wed Apr 23 2014
+14:00 <@matches> IEEE's float encoding is inconvenient
+14:01 <@matches> The mantissa is like, reversed
+14:01 <@matches> b_{23-i} * 2^{-i}
+14:19 <@matches> And the implicit extra 1 except when it isn't is a pain in the ass as well
+14:19 <@matches> It's like
+14:19 <@matches> I can't just copy the right bits I have to think
+14:19 <@matches> What is this
+14:19 <@matches> Mental effort
+14:19 <@matches> Blargh
+14:20 <@matches> I should have just stuck with the 8 bit floats with their 2 sign bits
+14:20 <@matches> The hydra float
+15:17 <@matches> Wow you get really different representations with an IEEE encoding of the bits
+15:17 <@matches> ...
+15:17 <@matches> I think I liked just treating the two parts as integers in the order they were stored better
+15:18 <@matches> I have to call pow(3) and a floating point division for every '1' in the mantissa to get it to agree with IEEE
+15:19 <@matches> Unless I'm missing some obvious trick
+15:20 <@matches> But in IEEE the mantissa is not an integer
+15:37 <@matches> Ooookkk
+15:38 <@matches> You're precision doesn't disappear as fast when you do it that way
+15:38 <@matches> Your
+15:38 <@matches> Whatever