Re: [Sdcc-user] PIC14 error in macro

[Raphael N. <rn...@we...>]

Hi,

> I'm converting my applications to SDCC PIC14, in one this use a macro
> to calculate USART baudrate, when compile the code are returned
> errors:
>  
> error: missing definition for symbol "__mullong", required by "main.o"
> error: missing definition for symbol "__divslong", required by
> "main.o"

I wondered why this "bug" did not show up earlier...
The support routines for multiplication/division/modulus operations on
data types longer than... hmm... a char (?) are not yet implemented and
integrated into the PIC14 libraries.
For now, you might be able to use the source files from the pic16 port
(device/lib/pic16/libsdcc/{int,long}/*.c), compile them as part of your
project and link them into the final binary.
Once I find some time (I seem to have lost pretty much of it ;-)) I will
augment the libraries.

Having said this, the hint by Ken Jackson regarding prefetching the
complex operations to compile-time is and remains the better approach,
because 'long' arithmetics on the PICs becomes both large and slow.

Regards,
Raphael