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

From Will Deacon <will.deacon@arm.com>
Newsgroups linux.kernel
Subject Re: [PATCH 1/2] arm64: bpf: add 'store immediate' instruction
Date 2015-11-11 13:20 +0100
Message-ID <qtCxB-2EB-13@gated-at.bofh.it> (permalink)
References <qtqd4-36K-7@gated-at.bofh.it> <qtqd4-36K-19@gated-at.bofh.it> <qttDX-59m-7@gated-at.bofh.it>
Organization linux.* mail to news gateway

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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@linaro.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
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Thread

[PATCH 0/2] arm64: bpf: add BPF_ST and BPF_XADD instructions support Yang Shi <yang.shi@linaro.org> - 2015-11-11 00:10 +0100
  [PATCH 1/2] arm64: bpf: add 'store immediate' instruction Yang Shi <yang.shi@linaro.org> - 2015-11-11 00:10 +0100
    Re: [PATCH 1/2] arm64: bpf: add 'store immediate' instruction Z Lim <zlim.lnx@gmail.com> - 2015-11-11 03:50 +0100
      Re: [PATCH 1/2] arm64: bpf: add 'store immediate' instruction Will Deacon <will.deacon@arm.com> - 2015-11-11 13:20 +0100
        Re: [PATCH 1/2] arm64: bpf: add 'store immediate' instruction Will Deacon <will.deacon@arm.com> - 2015-11-11 13:50 +0100
          Re: [PATCH 1/2] arm64: bpf: add 'store immediate' instruction "Shi, Yang" <yang.shi@linaro.org> - 2015-11-12 20:40 +0100
            Re: [PATCH 1/2] arm64: bpf: add 'store immediate' instruction Z Lim <zlim.lnx@gmail.com> - 2015-11-13 04:50 +0100

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