Hi all, As I understand it, the rounding direction of signed integer division in C is unspecified in C89/C94, and specified to be 'towards-zero' in C99. I need division 'towards -infinity' (with a 'mod' operation to match), i.e. for x and y I need to obtain D and M such that (1) D*abs(y)+M == x (2) 0 <= M<abs(y) For any signed x,y (y!=0). Is there a canonical way of doing this that is guaranteed to work in line with all C specifications? Best regards, Sidney Cadot The Netherlands