From: Thomas Huth <thuth@redhat.com>
To: "Philippe Mathieu-Daudé" <philmd@redhat.com>, qemu-devel@nongnu.org
Cc: "Fam Zheng" <fam@euphon.net>,
"Richard Henderson" <richard.henderson@linaro.org>,
"Kamil Rytarowski" <kamil@netbsd.org>,
"Alex Bennée" <alex.bennee@linaro.org>
Subject: Re: [PATCH v2 3/8] qemu/bswap: Replace bswapXXs() by compiler __builtin_bswap()
Date: Mon, 28 Sep 2020 19:29:33 +0200 [thread overview]
Message-ID: <82d583fa-6c71-2e79-2af7-b2ccdfe07b3a@redhat.com> (raw)
In-Reply-To: <20200928131934.739451-4-philmd@redhat.com>
On 28/09/2020 15.19, Philippe Mathieu-Daudé wrote:
> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
> ---
> include/qemu/bswap.h | 16 +++++++++-------
> 1 file changed, 9 insertions(+), 7 deletions(-)
>
> diff --git a/include/qemu/bswap.h b/include/qemu/bswap.h
> index 41131d3d76e..fed96dddd7a 100644
> --- a/include/qemu/bswap.h
> +++ b/include/qemu/bswap.h
> @@ -38,29 +38,31 @@ static inline uint64_t bswap64(uint64_t x)
>
> static inline void bswap16s(uint16_t *s)
> {
> - *s = bswap16(*s);
> + *s = __builtin_bswap16(*s);
> }
>
> static inline void bswap32s(uint32_t *s)
> {
> - *s = bswap32(*s);
> + *s = __builtin_bswap32(*s);
> }
>
> static inline void bswap64s(uint64_t *s)
> {
> - *s = bswap64(*s);
> + *s = __builtin_bswap64(*s);
> }
>
> #if defined(HOST_WORDS_BIGENDIAN)
> #define be_bswap(v, size) (v)
> -#define le_bswap(v, size) glue(bswap, size)(v)
> +#define le_bswap(v, size) glue(__builtin_bswap, size)(v)
> #define be_bswaps(v, size)
> -#define le_bswaps(p, size) do { *p = glue(bswap, size)(*p); } while(0)
> +#define le_bswaps(p, size) \
> + do { *p = glue(__builtin_bswap, size)(*p); } while (0)
> #else
> #define le_bswap(v, size) (v)
> -#define be_bswap(v, size) glue(bswap, size)(v)
> +#define be_bswap(v, size) glue(__builtin_bswap, size)(v)
> #define le_bswaps(v, size)
> -#define be_bswaps(p, size) do { *p = glue(bswap, size)(*p); } while(0)
> +#define be_bswaps(p, size) \
> + do { *p = glue(__builtin_bswap, size)(*p); } while (0)
> #endif
What's the advantage of the renaming here if bswap is already #defined
to the builtin function (or another useful function from a system
header)? This just looks like code churn to me?
Thomas
next prev parent reply other threads:[~2020-09-28 17:47 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-28 13:19 [PATCH v2 0/8] qemu/bswap: Use compiler __builtin_bswap() Philippe Mathieu-Daudé
2020-09-28 13:19 ` [PATCH v2 1/8] qemu/bswap: Remove unused qemu_bswap_len() Philippe Mathieu-Daudé
2020-09-28 13:19 ` [PATCH v2 2/8] qemu/bswap: Replace bswapXX() by compiler __builtin_bswap() Philippe Mathieu-Daudé
2020-09-28 13:19 ` [PATCH v2 3/8] qemu/bswap: Replace bswapXXs() " Philippe Mathieu-Daudé
2020-09-28 17:29 ` Thomas Huth [this message]
2020-09-28 13:19 ` [PATCH v2 4/8] qemu/bswap: Remove <byteswap.h> dependency Philippe Mathieu-Daudé
2020-09-28 13:19 ` [PATCH v2 5/8] qemu/bswap: Use compiler __builtin_bswap() on Haiku Philippe Mathieu-Daudé
2020-09-28 14:09 ` David CARLIER
2020-09-28 14:13 ` Daniel P. Berrangé
2020-09-28 14:18 ` Philippe Mathieu-Daudé
2020-10-19 11:00 ` Philippe Mathieu-Daudé
2020-09-28 15:00 ` David CARLIER
2020-09-28 17:29 ` Thomas Huth
2020-09-28 13:19 ` [PATCH v2 6/8] qemu/bswap: Use compiler __builtin_bswap() on FreeBSD Philippe Mathieu-Daudé
2020-09-28 17:32 ` Thomas Huth
2020-09-28 17:57 ` Philippe Mathieu-Daudé
2020-09-28 17:58 ` Philippe Mathieu-Daudé
2020-09-28 21:16 ` Ed Maste
2020-09-28 13:19 ` [PATCH v2 7/8] qemu/bswap: Use compiler __builtin_bswap() on NetBSD Philippe Mathieu-Daudé
2020-09-28 21:51 ` Kamil Rytarowski
2020-09-29 8:58 ` Peter Maydell
2020-09-29 14:06 ` Kamil Rytarowski
2020-09-28 13:19 ` [RFC PATCH v2 8/8] tests/vm: Add Haiku test based on their vagrant images Philippe Mathieu-Daudé
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=82d583fa-6c71-2e79-2af7-b2ccdfe07b3a@redhat.com \
--to=thuth@redhat.com \
--cc=alex.bennee@linaro.org \
--cc=fam@euphon.net \
--cc=kamil@netbsd.org \
--cc=philmd@redhat.com \
--cc=qemu-devel@nongnu.org \
--cc=richard.henderson@linaro.org \
/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 NNTP newsgroup(s).