Arm’s Cortex A57 is a 64-bit capable core that is implemented in the Nintendo Switch’s Nvidia Tegra X1. It is designed for low power and area efficiency, prioritizing those over high performance. The A57 has a flexible register file that can hold 64-bit or 128-bit results using multiple 32-bit entries. It can be implemented in clusters of up to four cores with a shared L2 cache. The A57’s branch predictor is modest but adequate for a low power design. It also has a small instruction cache and a unified register file for both integer and floating-point registers. Overall, the A57 brings unique features to the table and is more ambitious compared to older low power cores.
https://chipsandcheese.com/2023/12/12/cortex-a57-nintendo-switchs-cpu/