Well, temperatures usually change slowlyernitron wrote:...as performance is concern I think the bitwise operation is faster...
Presumably your concern is the CPU time spent doing the read.If so, bear in mind that floating point operations imply memory allocation. Also that multiplying by 0.0625 is the same as a sign-extended 4 bit right shift - albeit with the latter discarding fractional degrees. The best solution is application dependent; but for most practical purposes I'd probably stick with one of the floating point approaches.