At 09:01 03/14/99 +1000, Clyde Smith-Stubbs wrote:
>The intrinsic library routines (e.g. multiply, divide) are re-entrant in the
>sense that they can be called from an interrupt function, and no problems will
>occur if they're already executing, but this is achieved by saving the
>necessary RAM areas in the interrupt routine (the compiler saves only what
>appears
>to be necessary). User functions are generally speaking not re-entrant.

thanks for the clarification. makes sense.


>With respect to the original question about practicality of C on a PIC, the
>amount of RAM used by a C program should not be any larger than that used
>by an equivalent assembler program; data is data and occupies the same space
>irrespective of the language used.

as a matter of fact, due to the "smart" handling of local variables it
might even be that a compiler uses less ram than a not fully optimized
assembler program. (and who has the time to fully optimize everything? :)

ge