Hello Philipp, Pointer arithmetic and array access are very likely in an ISR. And that probably means underlying multiplications (or add or shift). Think buffers for UART/SPI/I2C/ADC/DAC.
Averaging a set of ADC samples can also bring division (or shift). And non-power-of-2 sized ring buffers can give modulo. Calling other functions from an ISR is generally frowned upon but can certainly happen. But if you can bear function overhead you can also bear a less optimal workaround IMHO. My 2 cents, Maarten > I wonder how interrupt handlers written by sdcc users look like, in > particular: > > * Do they contain divisions? > * Do they contain multiplications? > * Do they contain pointer arithmetic? > * Do they contain array accesses? > * Do they contain shifts? > * Do they call other functions? > * Are those other called functions static? > * Do those other called functions contain divisions? > > The information might be useful in improving a workaround for a hardware > division issue (see bug #2401, RFE #448 / 449). > > Philipp ------------------------------------------------------------------------------ _______________________________________________ Sdcc-user mailing list Sdcc-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/sdcc-user
