Date: Thu, 23 Aug 2018 14:40:35 -0700 From: Conrad Meyer <cem@freebsd.org> To: Alex Richardson <arichardson@freebsd.org> Cc: src-committers <src-committers@freebsd.org>, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: Re: svn commit: r338270 - head/lib/libmd Message-ID: <CAG6CVpVjytnfv4Xm2DtxNEE%2BgJ33OEnHmZwD97x-iG6iX6gPyA@mail.gmail.com> In-Reply-To: <201808231819.w7NIJXDG072054@repo.freebsd.org> References: <201808231819.w7NIJXDG072054@repo.freebsd.org>
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On Thu, Aug 23, 2018 at 11:19 AM, Alex Richardson <arichardson@freebsd.org> wrote: > Author: arichardson > Date: Thu Aug 23 18:19:33 2018 > New Revision: 338270 > URL: https://svnweb.freebsd.org/changeset/base/338270 > > Log: > Don't build skein_block_asm.s if we don't have an as binary >... > It might also be better to just > compile the C file in userspace since the compiler can the use SSE/AVX. FYI, in my (limited) testing, the hand-written assembly has something like 50% performance advantage over the reference C implementation, even with -march=native, etc. Using the reference C version is totally fine for bootstrapping, but the compiler is not yet smart enough to write the assembler versions. Best, Conrad
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