Hi Gordon, > Saw this posting recently which made me think... Especially as I'm doing a > lot of floating pint work which would no-doubt be accellerated by the > hardware multiply, however I've just had a look at some of the code in my > project... Although it has that warning, it is using the MUL instructions.
Since I posted this message, I've much modified my code and now in the .asm I see some "MULLW" as well, so indeed sddc uses the HW multiplier appropriately. Looks like in my original code there was a constant multiplication by 2, and the compiler probably figured out that it was less expensive to perform it using registers shifts than MUL*...? It was both the "FIXME" comment and absence of MUL* that draw my attention. Now I get the MULLW and still the "FIXME". Still don't know if the FIXME is something I should worry about, but anyway program execution apparently behaves as expected. BTW now that I'm using the PIC18 (16-bit) port, I seem to encounter much less compiler trouble than I had when previously using the PIC16 (14-bit) port. My project is now 2000+ lines of C code, and all the errors I fell upon were mine, not compiler's ;-) -- Michel Bouissou (OpenPGP ID 0xEB04D09C) ------------------------------------------------------------------------------ Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day trial. Simplify your report design, integration and deployment - and focus on what you do best, core application coding. Discover what's new with Crystal Reports now. http://p.sf.net/sfu/bobj-july _______________________________________________ Sdcc-user mailing list Sdcc-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/sdcc-user
