From mboxrd@z Thu Jan 1 00:00:00 1970 From: yang.shi@linaro.org (Shi, Yang) Date: Mon, 23 Nov 2015 11:34:58 -0800 Subject: [PATCH 1/2] arm64: bpf: add 'store immediate' instruction In-Reply-To: References: <1447195301-16757-1-git-send-email-yang.shi@linaro.org> <1447195301-16757-2-git-send-email-yang.shi@linaro.org> <20151111121256.GI9562@arm.com> <20151111123955.GK9562@arm.com> <5644E97B.6050203@linaro.org> Message-ID: <56536A62.4040103@linaro.org> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Hi folks, Any more comments on this patch (store immediate only)? I need more time to add XADD (I'm supposed everyone agrees it is equivalent to atomic_add). However, this one is irrelevant to XADD, so we may be able to apply it first? Thanks, Yang On 11/12/2015 7:45 PM, Z Lim wrote: > On Thu, Nov 12, 2015 at 11:33 AM, Shi, Yang wrote: >> On 11/11/2015 4:39 AM, Will Deacon wrote: >>> >>> Wait a second, we're both talking rubbish here :) The STR (immediate) >>> form is referring to the addressing mode, whereas this patch wants to >>> store an immediate value to memory, which does need moving to a register >>> first. >> >> >> Yes, the immediate means immediate offset for addressing index. Doesn't mean >> to store immediate to memory. >> >> I don't think any load-store architecture has store immediate instruction. >> > > Indeed. Sorry for the noise. > > Somehow Will caught a whiff of whatever I was smoking then :) >