On 2020-05-18 21:55:13 [+0200], Jorrit Jongma wrote: > What do you base this on?
So my memory was wrong. SSE2 is supported by all x86-64bit CPUs. Sorry for that. > would imply that SSSE3 is enabled out of the box on builds on machines > that support it, this is not the case (it certainly isn't on my Ubuntu > box). It would be preferred to detect this at runtime but getting that > to work on GCC is (apparently) a mess, and would probably require > modifications to configure/Makefile/etc that I'm not comfortable > doing, as my lack of expertise on those would probably lead me to > break the build for somebody else. If someone knowledgable enough in > that area wants to fix it, though... My suggestion would be to have a get_checksum1_sse2() and get_checksum1_sse3() and always build them. The compiler should support it. Then on runtime you would check for sse3 and based on the result get_checksum1() would either invoke the _sse2() or sse3(). Without auto detection it won't be utilized by distros. But yes, this could be improved afterwards. Sebastian -- Please use reply-all for most replies to avoid omitting the mailing list. To unsubscribe or change options: https://lists.samba.org/mailman/listinfo/rsync Before posting, read: http://www.catb.org/~esr/faqs/smart-questions.html
