From: Richard Henderson <richard.henderson@linaro.org>
To: Noah Goldstein <goldstein.w.n@gmail.com>,
Adhemerval Zanella <adhemerval.zanella@linaro.org>
Cc: libc-alpha@sourceware.org, Jeff Law <jeffreyalaw@gmail.com>,
Xi Ruoyao <xry111@xry111.site>
Subject: Re: [PATCH v11 10/29] string: Improve generic stpcpy
Date: Wed, 1 Feb 2023 10:26:57 -1000 [thread overview]
Message-ID: <9c954274-c719-79f4-a9bb-dadaef63d383@linaro.org> (raw)
In-Reply-To: <CAFUsyfLtp41iKdV65QLt2LLY4dNC=HVxv5qbA__Gu5D9OHs=ww@mail.gmail.com>
On 2/1/23 09:47, Noah Goldstein wrote:
>> +static __always_inline char *
>> +stpcpy_unaligned_loop (op_t *restrict dst, const op_t *restrict src,
>> + uintptr_t ofs)
>> +{
>
> Is the perf cost of unaligned stores greater than merging?
Generically, yes. Some hosts have no hw unaligned stores at all without even fallback to
trap and emulate, and compiler-generated unaligned stores devolve to byte-by-byte.
r~
next prev parent reply other threads:[~2023-02-01 20:27 UTC|newest]
Thread overview: 65+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-02-01 17:03 [PATCH v11 00/29] Improve generic string routines Adhemerval Zanella
2023-02-01 17:03 ` [PATCH v11 01/29] Parameterize op_t from memcopy.h Adhemerval Zanella
2023-02-01 17:03 ` [PATCH v11 02/29] Parameterize OP_T_THRES " Adhemerval Zanella
2023-02-01 17:03 ` [PATCH v11 03/29] Add string vectorized find and detection functions Adhemerval Zanella
2023-02-01 17:03 ` [PATCH v11 04/29] string: Improve generic strlen Adhemerval Zanella
2023-02-01 19:51 ` Noah Goldstein
2023-02-01 17:03 ` [PATCH v11 05/29] string: Improve generic strnlen with memchr Adhemerval Zanella
2023-02-01 19:36 ` Noah Goldstein
2023-02-01 19:57 ` Adhemerval Zanella Netto
2023-02-01 19:39 ` Noah Goldstein
2023-02-01 20:02 ` Adhemerval Zanella Netto
2023-02-01 17:03 ` [PATCH v11 06/29] string: Improve generic strchr Adhemerval Zanella
2023-02-01 19:44 ` Noah Goldstein
2023-02-01 20:03 ` Adhemerval Zanella Netto
2023-02-01 17:03 ` [PATCH v11 07/29] string: Improve generic strchrnul Adhemerval Zanella
2023-02-01 19:49 ` Noah Goldstein
2023-02-01 17:03 ` [PATCH v11 08/29] string: Improve generic strcmp Adhemerval Zanella
2023-02-01 17:34 ` Richard Henderson
2023-02-02 11:57 ` Adhemerval Zanella Netto
2023-02-01 17:03 ` [PATCH v11 09/29] string: Improve generic strncmp Adhemerval Zanella
2023-02-01 19:42 ` Noah Goldstein
2023-02-02 12:01 ` Adhemerval Zanella Netto
2023-02-01 17:03 ` [PATCH v11 10/29] string: Improve generic stpcpy Adhemerval Zanella
2023-02-01 17:29 ` Xi Ruoyao
2023-02-02 13:32 ` Adhemerval Zanella Netto
2023-02-01 17:37 ` Richard Henderson
2023-02-01 19:47 ` Noah Goldstein
2023-02-01 20:26 ` Richard Henderson [this message]
2023-02-01 17:03 ` [PATCH v11 11/29] string: Improve generic strcpy Adhemerval Zanella
2023-02-01 17:38 ` Richard Henderson
2023-02-01 17:03 ` [PATCH v11 12/29] string: Improve generic memchr Adhemerval Zanella
2023-02-01 19:49 ` Noah Goldstein
2023-02-01 17:03 ` [PATCH v11 13/29] string: Improve generic memrchr Adhemerval Zanella
2023-02-01 19:50 ` Noah Goldstein
2023-02-01 17:03 ` [PATCH v11 14/29] hppa: Add memcopy.h Adhemerval Zanella
2023-02-01 17:03 ` [PATCH v11 15/29] hppa: Add string-fza.h, string-fzc.h, and string-fzi.h Adhemerval Zanella
2023-02-01 17:03 ` [PATCH v11 16/29] alpha: Add string-fza, string-fzb.h, string-fzi.h, and string-shift.h Adhemerval Zanella
2023-02-01 17:03 ` [PATCH v11 17/29] arm: Add string-fza.h Adhemerval Zanella
2023-02-01 17:03 ` [PATCH v11 18/29] powerpc: " Adhemerval Zanella
2023-02-01 17:03 ` [PATCH v11 19/29] sh: Add string-fzb.h Adhemerval Zanella
2023-02-01 17:03 ` [PATCH v11 20/29] riscv: Add string-fza.h and string-fzi.h Adhemerval Zanella
2023-02-01 17:53 ` Richard Henderson
2023-02-02 12:30 ` Adhemerval Zanella Netto
2023-02-02 16:24 ` Richard Henderson
2023-02-04 16:31 ` Jeff Law
2023-02-05 17:33 ` Richard Henderson
2023-02-01 18:08 ` Noah Goldstein
2023-02-01 17:03 ` [PATCH v11 21/29] string: Hook up the default implementation on test-strlen Adhemerval Zanella
2023-02-01 17:54 ` Richard Henderson
2023-02-01 17:03 ` [PATCH v11 22/29] string: Hook up the default implementation on test-strnlen Adhemerval Zanella
2023-02-01 17:54 ` Richard Henderson
2023-02-01 17:04 ` [PATCH v11 23/29] string: Hook up the default implementation on test-strchr Adhemerval Zanella
2023-02-01 17:55 ` Richard Henderson
2023-02-01 17:04 ` [PATCH v11 24/29] string: Hook up the default implementation on test-strcmp Adhemerval Zanella
2023-02-01 17:55 ` Richard Henderson
2023-02-01 17:04 ` [PATCH v11 25/29] string: Hook up the default implementation on test-strncmp Adhemerval Zanella
2023-02-01 17:56 ` Richard Henderson
2023-02-01 17:04 ` [PATCH v11 26/29] string: Hook up the default implementation on test-stpcpy Adhemerval Zanella
2023-02-01 17:56 ` Richard Henderson
2023-02-01 17:04 ` [PATCH v11 27/29] string: Hook up the default implementation on test-strcpy Adhemerval Zanella
2023-02-01 17:56 ` Richard Henderson
2023-02-01 17:04 ` [PATCH v11 28/29] string: Hook up the default implementation on test-memchr Adhemerval Zanella
2023-02-01 17:57 ` Richard Henderson
2023-02-01 17:04 ` [PATCH v11 29/29] string: Hook up the default implementation on test-memrchr Adhemerval Zanella
2023-02-01 17:57 ` Richard Henderson
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=9c954274-c719-79f4-a9bb-dadaef63d383@linaro.org \
--to=richard.henderson@linaro.org \
--cc=adhemerval.zanella@linaro.org \
--cc=goldstein.w.n@gmail.com \
--cc=jeffreyalaw@gmail.com \
--cc=libc-alpha@sourceware.org \
--cc=xry111@xry111.site \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).