thanks, I'll study it with care. Saludos 2009/5/20, Jonas Amoson <jonas.amo...@home.se>: > > Hello Hugo, > > > Done some experiments with the indivudual > bits in Lunix, and would be very surprised > if it is not handled the same under Plan 9, > given the same hardware architecture. > > The exponent is stored in base 2, but What > might be a bit confusing, is that it is not > stored using two's complement, but rather > using a bias. If you have an exponent of 8 > bits (in a 32-bit IEEE float) an exponent of > zero is represented by '10000000' or 127. > Simply add the desired exponent, whether pos > or neg. -1 will be 126, +1 will be 128. > > This link explains the whole thing in more detail: > http://steve.hollasch.net/cgindex/coding/ieeefloat.html > > /jonas > > <-----Ursprungligt Meddelande-----> > From: hugo rivera [uai...@gmail.com] > Sent: 20/5/2009 11:50:51 AM > To: 9fans@9fans.net > Subject: [9fans] plan 9 floating point representation > > Hi, > I am learning a bit about floating point representation and I am > wondering about how plan 9 does this. > According to IEEE 754 (I think) the convention used by C for single > precision floating point numbers is to use 24 of the 32 bits available > for the significand and 8 bits for the exponent. It seems to me that > plan 9 follows this convention but I am still kind of puzzled about > the base of the exponent. I've been experimenting (on a 386) a while > and it looks like a base 4 to me, which is kind of strange, since I > was expecting a base 2 or 10. I think I got something wrong, but I > would appreciate if someone can explain this to me to have a better > idea of how this works. It looks to me that this stuff is very machine > dependent (or language?), is it? > The point of all this is to classify raw data (4 byte length) > according to their magnitude, I don't really care about the > significant. This is just an exercise for me, since there are other > easier ways to do it. > > Saludos > -- > Hugo > > . > > > > > _______________________________________________________________ > Eniro Supersök - är vad det heter > >
-- Hugo
