Date: Wed, 25 Jan 2017 21:33:04 +0000 From: bugzilla-noreply@freebsd.org To: freebsd-bugs@FreeBSD.org Subject: [Bug 216467] [request] Hardware (SSE 4.2) CRC32C support in calculate_crc32c() Message-ID: <bug-216467-8-WtPBdCAlzh@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-216467-8@https.bugs.freebsd.org/bugzilla/> References: <bug-216467-8@https.bugs.freebsd.org/bugzilla/>
next in thread | previous in thread | raw e-mail | index | archive | help
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D216467 Conrad Meyer <cem@freebsd.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |cem@freebsd.org --- Comment #2 from Conrad Meyer <cem@freebsd.org> --- We have a patch for this at Isilon. Unfortunately, our assembly CRC32C implementations are privately licensed I= ntel code we can't share. Do you have a permissively licensed replacement we co= uld use in FreeBSD? There are two algorithms. One algorithm just uses SSE4.2 instructions and = no FPU; that's generally usable in the kernel. There is another algorithm that also uses PCLMULQDQ (FPU) which is less generally suitable for the kernel, = but an option if the thread is already preserving FPU state. --=20 You are receiving this mail because: You are the assignee for the bug.=
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?bug-216467-8-WtPBdCAlzh>