netdev - Re: [PATCH 1/2] arm64: bpf: add 'store immediate' instruction

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Wed, 11 Nov 2015 12:12:56 +0000
From:	Will Deacon <will.deacon@....com>
To:	Z Lim <zlim.lnx@...il.com>
Cc:	Yang Shi <yang.shi@...aro.org>,
	Alexei Starovoitov <ast@...nel.org>, daniel@...earbox.net,
	Catalin Marinas <catalin.marinas@....com>,
	Xi Wang <xi.wang@...il.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Network Development <netdev@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	linaro-kernel@...ts.linaro.org
Subject: Re: [PATCH 1/2] arm64: bpf: add 'store immediate' instruction

On Tue, Nov 10, 2015 at 06:45:39PM -0800, Z Lim wrote:
> On Tue, Nov 10, 2015 at 2:41 PM, Yang Shi <yang.shi@...aro.org> wrote:
> > aarch64 doesn't have native store immediate instruction, such operation
> 
> Actually, aarch64 does have "STR (immediate)". For arm64 JIT, we can
> consider using it as an optimization.

Yes, I'd definitely like to see that in preference to moving via a
temporary register.

Will
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html