From: Andi Kleen <ak@suse.de>
To: David Howells <dhowells@redhat.com>
Cc: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org#
Subject: Re: [RHEL5 PATCH 1/4] Provide fallback full 64-bit divide/modulus ops for gcc
Date: 15 Aug 2006 10:10:32 +0200 [thread overview]
Message-ID: <p734pwea07b.fsf@verdi.suse.de> (raw)
In-Reply-To: <20060814211507.27190.61876.stgit@warthog.cambridge.redhat.com>
David Howells <dhowells@redhat.com> writes:
> Provide simple, reasonably quick full 64-bit divide and modulus ops for gcc to
> call behind the scenes as:
>
> __udivmoddi4
> __udivdi3
> __umoddi3
At least Linus' traditional argument against this is that it's better
to open code these (do_div) so that it's clear to the coder that they
are really costly.
-Andi
next prev parent reply other threads:[~2006-08-15 8:10 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-08-14 21:15 [PATCH 0/4] Use 64-bit inode numbers internally in the kernel David Howells
2006-08-14 21:15 ` [RHEL5 PATCH 1/4] Provide fallback full 64-bit divide/modulus ops for gcc David Howells
2006-08-15 6:44 ` Jan Engelhardt
2006-08-15 8:10 ` Andi Kleen [this message]
2006-08-15 8:29 ` David Howells
2006-08-18 8:39 ` Pavel Machek
2006-08-18 10:33 ` David Howells
2006-08-14 21:15 ` [RHEL5 PATCH 2/4] VFS: Make inode numbers 64-bits David Howells
2006-08-15 1:31 ` Al Viro
2006-08-15 8:21 ` David Howells
2006-08-15 9:06 ` Al Viro
2006-08-15 8:32 ` David Howells
2006-08-15 9:02 ` Al Viro
2006-08-15 9:25 ` David Howells
2006-08-15 12:45 ` Stephen Rothwell
2006-08-15 6:48 ` Jan Engelhardt
2006-08-14 21:15 ` [RHEL5 PATCH 3/4] VFS: Clear up u-long-long ino_t print format warnings David Howells
2006-08-14 21:15 ` [RHEL5 PATCH 4/4] VFS: Fix 64-bit ino_t warning in CacheFiles facility David Howells
2006-08-15 0:36 ` [PATCH 0/4] Use 64-bit inode numbers internally in the kernel Josh Boyer
2006-08-15 8:21 ` David Howells
2006-08-15 9:13 ` Al Viro
-- strict thread matches above, loose matches on Subject: below --
2006-08-15 6:58 [RHEL5 PATCH 1/4] Provide fallback full 64-bit divide/modulus ops for gcc Jan Engelhardt
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