From: Richard Henderson <rth@twiddle.net>
To: malc <av1474@comtv.ru>
Cc: Paolo Bonzini <pbonzini@redhat.com>, qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] [PATCH v2 3/3] move unaligned memory access functions to bswap.h
Date: Tue, 07 Jun 2011 09:54:34 -0700 [thread overview]
Message-ID: <4DEE57CA.8070902@twiddle.net> (raw)
In-Reply-To: <alpine.LNX.2.00.1106070302450.2524@linmac>
On 06/06/2011 04:07 PM, malc wrote:
> Depends on how bswap_16 is defined. If it is __builtin_bswap16
> then 4.5.0 and 4.6.0 generate byte reversed loads, and previous
> versions lack that builtin, so i don't think this generic code
> should go in.
It would continue to be defined as-is, without direct reference
to the __builtin_bswap functions. But you're right that the
generic code would depend on the bswap optimization pass that
recognizes the mask/shift/or pattern and converts it to the
builtins internally.
What if we kept the ppc ifdefs, but converted the rest to the
gcc generic code?
r~
next prev parent reply other threads:[~2011-06-07 16:54 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-06 14:25 [Qemu-devel] [PATCH v2 0/3] make endian-independent unaligned memory access functions available to libhw Paolo Bonzini
2011-06-06 14:25 ` [Qemu-devel] [PATCH v2 1/3] move WORDS_ALIGNED to qemu-common.h Paolo Bonzini
2011-06-06 17:15 ` Andreas Färber
2011-06-06 20:24 ` Paolo Bonzini
2011-06-06 22:15 ` Richard Henderson
2011-06-07 9:17 ` Paolo Bonzini
2011-06-06 14:25 ` [Qemu-devel] [PATCH v2 2/3] softfloat: change default nan definitions to variables Paolo Bonzini
2011-06-06 14:25 ` [Qemu-devel] [PATCH v2 3/3] move unaligned memory access functions to bswap.h Paolo Bonzini
2011-06-06 19:56 ` Richard Henderson
2011-06-06 20:27 ` Paolo Bonzini
2011-06-06 22:05 ` Richard Henderson
2011-06-06 23:07 ` malc
2011-06-07 16:54 ` Richard Henderson [this message]
2011-06-07 17:29 ` malc
2011-07-06 13:29 ` [Qemu-devel] [PATCH v2 0/3] make endian-independent unaligned memory access functions available to libhw Paolo Bonzini
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=4DEE57CA.8070902@twiddle.net \
--to=rth@twiddle.net \
--cc=av1474@comtv.ru \
--cc=pbonzini@redhat.com \
--cc=qemu-devel@nongnu.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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.