From mboxrd@z Thu Jan  1 00:00:00 1970
From: Marek Vasut <marek.vasut@gmail.com>
Date: Wed, 31 Aug 2011 13:56:23 +0200
Subject: [U-Boot] [PATCH] arm: add 64-64 bit divider
In-Reply-To: <1314787130-1043-1-git-send-email-clchiou@chromium.org>
References: <1314787130-1043-1-git-send-email-clchiou@chromium.org>
Message-ID: <201108311356.23919.marek.vasut@gmail.com>
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To: u-boot@lists.denx.de

On Wednesday, August 31, 2011 12:38:50 PM Che-Liang Chiou wrote:
> This patch adds a 64-64 bit divider that supports ARMv4 and above.
> 
> Because clz (count leading zero) instruction is added until ARMv5, the
> divider implements a clz function for ARMv4 targets.
> 
> The divider was tested with the following test driver code ran by
> qemu-arm:
> 
>   int main(void)
>   {
>     uint64_t a, b, q, r;
>     while (scanf("%llx %llx %llx %llx", &a, &b, &q, &r) > 0)
>       printf("%016llx %016llx %016llx %016llx\n", a, b, a / b, a % b);
>     return 0;
>   }
> 
> Signed-off-by: Che-Liang Chiou <clchiou@chromium.org>
> Cc: Albert Aribaud <albert.u.boot@aribaud.net>
> ---

Hi,

do you see any kind of a performance hit so you can't use the default "C" 
version?

Cheers