Le quartidi 4 brumaire, an CCXXIV, Ganesh Ajjanagadde a écrit : > Seems like the (x > y) - (x < y) trick works very well: GCC optimizes > it to branch-less code, and it is overflow safe: > https://stackoverflow.com/questions/10996418/efficient-integer-compare-function/10997428#10997428 > > Will submit patch to convert all qsort comparators (the ones for > integers) to this form, yielding two benefits:
Nice. Maybe make it a macro: AV_DIFFSIGN(x, y). Regards, -- Nicolas George
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