Repository navigation
Provide x86-64-v2 optimizations #247
Description
Windows 11 version 24H2, Rocky Linux 9, RedHat Linux 9, all defaults on x86-64-v2 which means that we have SSSE3, SSE4.1, SSE4.2 and POPCNT. We might be able to include more optimizations for these cases.
https://gist.github.com/CKingX/0d555071fa5555c4a982b20e8273077f
Activity
IRainman commentedon Mar 9, 2025
Also since Windows 8 it's not boot without popcnt.
lemire commentedon Mar 10, 2025
@IRainman We may not be able to support x86-64-v2 optimizations under Visual Studio because it does not set macros.
Having to do runtime dispatching might be too much for a header-only library.
IRainman commentedon Oct 9, 2026
Yes, but for MSVC in my fork, I add a manual possibility to set the x86 vector level, and it's automatically enabled SSE4.2 path when AVX is present.