Hi, If you realy are into numerics, you can emulate doubles using floats. Here are some pointers http://stackoverflow.com/questions/6769881/emulate-double-using-2-floats At the endo of the day everythign is an integer, so you can always re implement double precision (from your link you will need operators -, +, * and function sin).
The issue there is you are going to be doing a lot of bookkeeping (you will be reinventing the wheel :D). If you go this way I suggest you first test all you programs in a easy to use language (Octave, Python, etc) using floats and integers. Of course it would be easy just to find a compiler with double support. Good luck. On Wed, Jul 9, 2014 at 12:42 PM, Daniel Michalik <s...@blackamp.de> wrote: > Dear all, > I'm trying to implement a conversion from solar (regular) time to > sidereal time for astronomical purposes on a PIC16F1938. As far as I > understand sdcc supports single precision only. I would like to ask for > advice how to proceed. For the calculations necessary for the time > conversion see http://aa.usno.navy.mil/faq/docs/GAST.php. > I do not see how I could do this in single precision, but I'd love to > hear some advice of people more experienced with microprocessor > programming and sdcc. > > - Do I need to change to a different compiler than sdcc? > - Can double precision floating point operations be emulated in a > straight forward way within sdcc? > - Is there a way to reformulate the conversion to be correct with single > precision calculations? > > Kind regards, > Daniel > > ------------------------------------------------------------------------------ > Open source business process management suite built on Java and Eclipse > Turn processes into business applications with Bonita BPM Community Edition > Quickly connect people, data, and systems into organized workflows > Winner of BOSSIE, CODIE, OW2 and Gartner awards > http://p.sf.net/sfu/Bonitasoft > _______________________________________________ > Sdcc-user mailing list > Sdcc-user@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/sdcc-user -- Juan Pablo Carbajal Engagement manager www.dwengo.org Follow us on: Facebook: http://facebook.com/dwengo Twitter: @dwengo of http://twitter.com/dwengo Youtube: http://www.youtube.com/user/Dwengovzw Google RISE project: http://goo.gl/BD540 Chat: #dwengo in irc.freenode.net ------------------------------------------------------------------------------ Open source business process management suite built on Java and Eclipse Turn processes into business applications with Bonita BPM Community Edition Quickly connect people, data, and systems into organized workflows Winner of BOSSIE, CODIE, OW2 and Gartner awards http://p.sf.net/sfu/Bonitasoft _______________________________________________ Sdcc-user mailing list Sdcc-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/sdcc-user
