You may have heard Linux pundits discussing x86-64-v3. Can recompiling Linux code to use this bring benefits? To answer that question, you probably need to know what x86-64-v3 is, and [Gary Explains]… well… explains it in a recent video.
If you’d rather digest text, RedHat has a recent article about their experiments using the instructions set in RHEL10. From that article, you can see that most of the new instructions support some enhancements for vectors and bit manipulation. It also allows for more flexible instructions that leave their results in an explicit destination register instead of one of the operand registers.
Of course, none of this matters for high-level code unless the compiler supports it. However, gcc version 12 will automatically vectorize code when using the -O2 optimization flags.
