3 ms·
Thumb was removed from ARMv8 (AArch64). If you use 32-but legacy, it may exist on some chips; but it’s no longer the benefit it once was.
by deaddodo 6y ago
Thumb was removed from ARMv8 (AArch64). If you use 32-but legacy, it may exist on some chips; but it’s no longer the benefit it once was.
- hajile 6y agoIt's always been of the same value. You exchange performance for code density. They want aarch64 to be high-performance, so they removed thumb. RISC-V compact instructions don't require special modes and run in fully-mixed mode with 32-bit instructions without all the penalties thumb has (they are literally just extended into their 32-bit counterparts internally).
- deaddodo 6y ago> It's always been of the same value. You exchange performance for code density. High code density became less valuable, was the point.