From mboxrd@z Thu Jan  1 00:00:00 1970
From: James Hogan <james.hogan@imgtec.com>
Subject: Re: [PATCH] arch: metag: lib: add "umoddi3.S" file for __umoddi3()
Date: Fri, 20 Dec 2013 10:48:43 +0000
Message-ID: <52B4208B.1080801@imgtec.com>
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To: Chen Gang <gang.chen.5i5j@gmail.com>
Cc: rostedt@goodmis.org, "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>, linux-metag@vger.kernel.org

On 20/12/13 10:20, Chen Gang wrote:
> Hmm... but do you know why we need some 64-bit functions which are
> implemented under "arch/metag/lib/*.S"? can we use <linux/math64.h>
> instead of them? (e.g 64-bit '/').

If you look at linux/math64.h you'll see it only implements division
operations. The other 64 bit operations like shift, compare, and
multiply are relatively cheap so are implemented as intrinsics instead.

Cheers
James