As for the range.. Unfortunately, I need from say 1.0000001 to something around 99999999 with any number of decimal points (I may eventually go down to 0.001). It would require at least three bytes to go fixed point. I do take an inverse of this, but can set the answer to another variable. Using float just makes this a ton easier. I have done some fixed point and even started this in fixed point, but found it to be a big pain. Probably what I can do is just limit the ranges of the input values to the float range/precision. That would probably work fine. Correct me if I'm wrong but if I only allowed seven significant digits to the right of a decimal and seven significant digits to the left, then I'm ok. This will easily fit my design requirements. In fact, I just realized that I am already forcing numbers less than 1 to have a leading zero. This will compensate for the "8th" digit, so never mind (heh)! Anyway, thanks for the recommendations, always a pleasure to ask you guys questions. -Mark Stokes
P.S. Is there a list of unsupported float functions that need to be implemented? The docs imply that you need help getting all the functions done. PPS. Suggestion. I think it would be helpful if when using "double", you should get a compiler error that says that double is not supported. Is this easy/possible? PPPS. Bill, yes, mspgcc does support long long, and I'm using at least one. You can refer to doc.txt line 579 (section 5 memory API's) to find the supported data types. -----Original Message----- From: mspgcc-users-ad...@lists.sourceforge.net [mailto:mspgcc-users-ad...@lists.sourceforge.net] On Behalf Of Thomas Carley Sent: Wednesday, February 12, 2003 8:16 AM To: mspgcc-users@lists.sourceforge.net Subject: Re: [Mspgcc-users] Double data type? Would a fixed point representation work well here? If you use base 2 (binary fixed point) it is very efficient. What is the range of data you need to represent, and with what precision? On Wed, 12 Feb 2003, Dmitry wrote: > 64bits doubles are not supported. > I have no plans to make this support. > > only 32bits IEEE754 floats are (somehow) suported. > > ~d > > > On Wednesday 12 February 2003 00:17, Mark Stokes wrote: > > What happened to the double data type that was discussed earlier. I > > have found a need for it and was wondering. Here's my dilemma: > > I am using 8-digit 7-seg display to represent things on the screen. > > This means that if I want to represent a floating point number that is > > less than one like 0.9999999 I would have a number that is out of the > > bounds of the "float" data type. For example: > > > > float floatvar; > > > > floatvar = 0.99999999 > > > > Then floatvar ends up == 1 which is not helping me. I need it to == > > .99999999 because internally the controller can't deal w/ numbers (in > > this particular variable) that are >= 1.0. > > However, if I take the same code and put on Borland, and use "double's", > > then I get the intended result (floatvar ends up == to 0.99999999). > > {footnote: if I use float in Borland the same thing happens.} > > > > Any ideas on when "double" will be available? What about a new release > > of the win32 executables? Perhaps I'll get the gnu tree working so that > > I can make win32 releases, but right now I don't have the time to mess > > w/ that. > > > > Thanks > > -Mark > > > > > > > > ------------------------------------------------------- > > This SF.NET email is sponsored by: > > SourceForge Enterprise Edition + IBM + LinuxWorld = Something 2 See! > > http://www.vasoftware.com > > _______________________________________________ > > Mspgcc-users mailing list > > Mspgcc-users@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/mspgcc-users > > -- > /******************************************************************** > ("`-''-/").___..--''"`-._ (\ Dimmy the Wild UA1ACZ > `6_ 6 ) `-. ( ).`-.__.`) Enterprise Information Sys > (_Y_.)' ._ ) `._ `. ``-..-' Nevsky prospekt, 20 / 44 > _..`--'_..-_/ /--'_.' ,' Saint Petersburg, Russia > (il),-'' (li),' ((!.-' +7 (812) 3468202, 5585314 > ********************************************************************/ > > > > ------------------------------------------------------- > This SF.NET email is sponsored by: > SourceForge Enterprise Edition + IBM + LinuxWorld http://www.vasoftware.com > _______________________________________________ > Mspgcc-users mailing list > Mspgcc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/mspgcc-users > ------------------------------------------------------- This SF.NET email is sponsored by: SourceForge Enterprise Edition + IBM + LinuxWorld = Something 2 See! http://www.vasoftware.com _______________________________________________ Mspgcc-users mailing list Mspgcc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mspgcc-users
