From: Richard Henderson <rth@twiddle.net>
To: Aurelien Jarno <aurelien@aurel32.net>, qemu-devel@nongnu.org
Cc: Corentin Chary <corentin.chary@gmail.com>
Subject: Re: [Qemu-devel] [PATCH] bitops: provide an inline implementation of find_first_bit
Date: Sun, 22 Dec 2013 09:04:27 -0800 [thread overview]
Message-ID: <52B71B9B.3010707@twiddle.net> (raw)
In-Reply-To: <1387711957-703-1-git-send-email-aurelien@aurel32.net>
On 12/22/2013 03:32 AM, Aurelien Jarno wrote:
> find_first_bit has started to be used heavily in TCG code. The current
> implementation based on find_next_bit is not optimal and can't be
> optimized be the compiler if the bit array has a fixed size, which is
> the case most of the time.
>
> This new implementation does not use find_next_bit and is yet small
> enough to be inlined.
>
> Cc: Richard Henderson <rth@twiddle.net>
> Cc: Corentin Chary <corentin.chary@gmail.com>
>
> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
> ---
> include/qemu/bitops.h | 12 +++++++++++-
> 1 file changed, 11 insertions(+), 1 deletion(-)
Reviewed-by: Richard Henderson <rth@twiddle.net>
r~
next prev parent reply other threads:[~2013-12-22 17:04 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-12-22 11:32 [Qemu-devel] [PATCH] bitops: provide an inline implementation of find_first_bit Aurelien Jarno
2013-12-22 17:04 ` Richard Henderson [this message]
2014-06-19 8:36 ` Paolo Bonzini
2014-06-20 8:48 ` Aurelien Jarno
2014-06-20 8:58 ` Paolo Bonzini
2014-06-20 9:43 ` Aurelien Jarno
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