Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752711AbbKKMM4 (ORCPT ); Wed, 11 Nov 2015 07:12:56 -0500 Received: from foss.arm.com ([217.140.101.70]:59783 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752609AbbKKMMy (ORCPT ); Wed, 11 Nov 2015 07:12:54 -0500 Date: Wed, 11 Nov 2015 12:12:56 +0000 From: Will Deacon To: Z Lim Cc: Yang Shi , Alexei Starovoitov , daniel@iogearbox.net, Catalin Marinas , Xi Wang , LKML , Network Development , "linux-arm-kernel@lists.infradead.org" , linaro-kernel@lists.linaro.org Subject: Re: [PATCH 1/2] arm64: bpf: add 'store immediate' instruction Message-ID: <20151111121256.GI9562@arm.com> References: <1447195301-16757-1-git-send-email-yang.shi@linaro.org> <1447195301-16757-2-git-send-email-yang.shi@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 657 Lines: 16 On Tue, Nov 10, 2015 at 06:45:39PM -0800, Z Lim wrote: > On Tue, Nov 10, 2015 at 2:41 PM, Yang Shi 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 linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/