From: Florian Weimer <fweimer@redhat.com>
To: Florian Weimer via Libc-alpha <libc-alpha@sourceware.org>
Subject: Re: [PATCH] libgcc: Mostly vectorize CIE encoding extraction for FDEs
Date: Mon, 17 Oct 2022 15:00:15 +0200 [thread overview]
Message-ID: <87ilkimwps.fsf@oldenburg.str.redhat.com> (raw)
In-Reply-To: <87mt9umxu4.fsf@oldenburg.str.redhat.com> (Florian Weimer via Libc-alpha's message of "Mon, 17 Oct 2022 14:36:03 +0200")
* Florian Weimer via Libc-alpha:
> "zR" and "zPLR" are the most common augmentations. Use a simple
> SIMD-with-in-a-register technique to check for both augmentations,
> and that the following variable-length integers have length 1, to
> get more quickly at the encoding field.
>
> libgcc/
>
> * unwind-dw2-fde.c (get_cie_encoding_slow): Rename from
> get_cie_encoding. Mark as noinline.
> (get_cie_encoding): Add fast path for "zR" and "zPLR"
> augmentations. Call get_cie_encoding_slow as a fall-back.
Sorry, this should have to gcc-patches. Will resend there.
Thanks,
Florian
next prev parent reply other threads:[~2022-10-17 13:00 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-17 12:36 Florian Weimer
2022-10-17 13:00 ` Florian Weimer [this message]
2022-10-17 13:03 ` Andreas Schwab
2022-10-17 13:07 ` Florian Weimer
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