je viens de tomber la dessus (a propos de l'ARMv7 Cortex A9 (utilise dans entre autres les PlayStation-Vita et i-trucs/tablettes)
dans le genre "effets de bords sournois" c'est pas mal

Since the Branch Target Address Cache (BTAC) is based on 16-byte sizes and only allows 2 branches per line, if any code has more than 2 branches within 16-bytes of code, then it is likely to flush the instruction pipeline.