So far I've got these results: Allwinner H616 (Cortex-A53) 64-bit mode linux-5.15.7.tar.xz : 25.12 --> 24.43 (+3%) linux-firmware-20211027.tar.xz

So far I've got these results: Allwinner H616 (Cortex-A53) 64-bit mode linux-5.15.7.tar.xz : 25.12 --> 24.43 (+3%) linux-firmware-20211027.tar.xz : 22.80 --> 21.63 (+5%) Maybe on more complex ARM processors the results will be better. Update: It looks like I need to use inline assembly for AArch64 or GCC where it can make two CSEL instructions from the same condition - replaces them with if-else branch. And I got better results (below) than when tried to avoid this compiler behavior but didn't use inline assembly (results above). linux-5.15.7.tar.xz : 25.12 --> 23.85 (+5%) linux-firmware-20211027.tar.xz : 22.80 --> 21.10 (+8%)