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[Bug libc/18402] FPU use in application before main()
- From: "hjl.tools at gmail dot com" <sourceware-bugzilla at sourceware dot org>
- To: glibc-bugs at sourceware dot org
- Date: Tue, 12 May 2015 16:27:15 +0000
- Subject: [Bug libc/18402] FPU use in application before main()
- Auto-submitted: auto-generated
- References: <bug-18402-131 at http dot sourceware dot org/bugzilla/>
https://sourceware.org/bugzilla/show_bug.cgi?id=18402
--- Comment #8 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to H.J. Lu from comment #7)
> It is not ld.so which calls strrchr. It is __init_misc in libc.so.
If we want to get rid of SSE optimized strrchr before main, we
need a different strrchr. However, if program or compiler call
any string/memory functions, SSE registers may be used to optimize
those string/memory functions. The question is how much SSE usage
impacts performance on real applications.
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