Is it possible to compile newlib's maths library with mspgcc? It is not going to be as efficient as a carefully-writen version specifically for the msp, but I would imagine that as long as you have sufficient memory in the target (and have low enough speed requirements...), then that would give you the other floating-point functions you could wish for. Just make sure the newlib library is last on the linker's list, and you will get the msp-specific versions of sin, cos, etc., and the newlib Bessel functions. Checking that the newlib maths library worked ok would surely be less effort than trying to re-write the functions, and should satisfy most requirements.
mvh. David. > > > > > > 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. > > Some Bessels, associated Legendre's (God! I 'm missing them a lot!), > hell loads of any spherical ones are missed. Some simpler ones (like sin, cos, > all hyperbolic, simple bessels, etc. are there) > > > 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? > Not easy, yet possible. gcc just implicitly makes doubles floats. > > > 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 > > > > > > > > ------------------------------------------------------- > > 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 > >
