From: Ralf Baechle <ralf@oss.sgi.com>
To: Jun Sun <jsun@mvista.com>
Cc: "Kevin D. Kissell" <kevink@mips.com>,
linux-mips@fnet.fr, linux-mips@oss.sgi.com
Subject: Re: load_unaligned() and "uld" instruction
Date: Fri, 6 Oct 2000 18:32:08 +0200 [thread overview]
Message-ID: <20001006183208.C9061@bacchus.dhis.org> (raw)
In-Reply-To: <39DD68DE.E9B26A3D@mvista.com>; from jsun@mvista.com on Thu, Oct 05, 2000 at 10:53:34PM -0700
On Thu, Oct 05, 2000 at 10:53:34PM -0700, Jun Sun wrote:
> Although the usb does use get_unaligned(u64) (ldl/ldr), it actually does
> not run into it - at least in my test so far. That probably explains
> why my fix runs on the R5432 CPU so far.
No, you just never hit the window where the your 64-bit reg got corrupted by
an exception. The old broken macros also had a cast to long in them
which was truncating the loaded 64-bit word so in 100% of cases the upper
32-bit was modified in creative ways. So I guess you were just lucky and
never hit the case were this actually bits.
Ralf
next prev parent reply other threads:[~2000-10-06 22:22 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2000-09-25 18:48 load_unaligned() and "uld" instruction Jun Sun
2000-09-25 21:16 ` Dominic Sweetman
2000-09-25 21:36 ` Jun Sun
2000-09-25 23:29 ` Ralf Baechle
2000-09-26 6:22 ` Kevin D. Kissell
2000-09-26 6:22 ` Kevin D. Kissell
2000-09-26 9:08 ` Dominic Sweetman
2000-09-26 9:08 ` Dominic Sweetman
2000-09-29 17:22 ` Ralf Baechle
2000-10-09 14:49 ` Dominic Sweetman
2000-09-26 18:04 ` Jun Sun
2000-09-27 10:06 ` Maciej W. Rozycki
2000-10-06 0:43 ` Ralf Baechle
2000-10-06 9:54 ` Maciej W. Rozycki
2000-10-06 16:21 ` Ralf Baechle
2000-10-05 12:13 ` Ralf Baechle
2000-10-06 1:11 ` Jun Sun
2000-10-05 19:41 ` Kevin D. Kissell
2000-10-05 19:41 ` Kevin D. Kissell
2000-10-06 4:32 ` Jun Sun
2000-10-05 22:10 ` Kevin D. Kissell
2000-10-05 22:10 ` Kevin D. Kissell
2000-10-06 5:53 ` Jun Sun
2000-10-05 23:14 ` Kevin D. Kissell
2000-10-05 23:14 ` Kevin D. Kissell
2000-10-06 16:32 ` Ralf Baechle [this message]
2000-10-07 1:35 ` Jun Sun
2000-10-06 22:26 ` Ralf Baechle
2000-10-06 16:28 ` Ralf Baechle
2000-10-07 1:24 ` Jun Sun
2000-10-06 20:46 ` Kevin D. Kissell
2000-10-06 20:46 ` Kevin D. Kissell
2000-10-07 7:16 ` Jun Sun
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