From: Segher Boessenkool <segher@kernel.crashing.org>
To: Marcelo Tosatti <marcelo.tosatti@cyclades.com>
Cc: linuxppc-dev@ozlabs.org, cort@fsmlabs.com,
linux-ppc-embedded <linuxppc-embedded@ozlabs.org>
Subject: Re: __switch_to test-and-branch ALTIVEC specific?
Date: Thu, 15 Sep 2005 10:21:52 +0200 [thread overview]
Message-ID: <3af7fefa2343235f0c8e96a426e9a22c@kernel.crashing.org> (raw)
In-Reply-To: <20050913203555.GB18639@dmt.cnet>
>> This probably has to due with what happens on a G4 system with a
>> kernel not build with Altivec.. However, I dont remember exactly what
>> behavior is desired.
A kernel not build with AltiVec support will just
SIGILL any user process that tries to use it (and
MSR[VEC] = 0).
The code here can safely be #ifdef'ed out (but note
I only looked at the code, I didn't test it ;-) )
Segher
next prev parent reply other threads:[~2005-09-15 9:22 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-09-13 17:50 __switch_to test-and-branch ALTIVEC specific? Marcelo Tosatti
2005-09-13 19:05 ` Kumar Gala
2005-09-13 20:35 ` Marcelo Tosatti
2005-09-13 21:43 ` Kumar Gala
2005-09-18 1:31 ` Benjamin Herrenschmidt
2005-09-15 8:21 ` Segher Boessenkool [this message]
2005-09-18 1:31 ` Benjamin Herrenschmidt
2005-09-13 22:23 ` -dev and -embedded cross-posting Eugene Surovegin
2005-09-15 11:18 ` __switch_to test-and-branch ALTIVEC specific? Paul Mackerras
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