linux-kernel - Re: [RFC PATCH v1 2/5] tools/nolibc: x86-64: Use `rep stosb` for `memset()`

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Message-ID: <CAOG64qOtLzZQvB1Lsa6N8HvOHRar8fa7uwhOCe=MP4y5Ow-nzw@mail.gmail.com>
Date:   Wed, 30 Aug 2023 23:11:15 +0700
From:   Alviro Iskandar Setiawan <alviro.iskandar@...weeb.org>
To:     Ammar Faizi <ammarfaizi2@...weeb.org>
Cc:     Willy Tarreau <w@....eu>,
        Thomas Weißschuh <linux@...ssschuh.net>,
        Nicholas Rosenberg <inori@...x.org>,
        Michael William Jonathan <moe@...weeb.org>,
        "GNU/Weeb Mailing List" <gwml@...r.gnuweeb.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [RFC PATCH v1 2/5] tools/nolibc: x86-64: Use `rep stosb` for `memset()`

On Wed, Aug 30, 2023 at 11:08 PM Ammar Faizi wrote:
> On Wed, Aug 30, 2023 at 05:51:52PM +0200, Willy Tarreau wrote:
> >     xchg %eax, %esi      1
> >     push %rdx            1
> >     pop %rcx             1
> >     push %rdi            1
> >     rep movsb            2 [sic]
> >     pop %rax             1
> >     ret                  1
> >     ------------- Total: 8 bytes :-)

That's beautiful!

-- Viro