Yes, but the question was how is it preserved? The SSE stuff works the
same as the FPU stuff in that it is switched lazily. See npxsave() and
where it is called. If a process attaches to the fpu, its state is kept
in the fpu the whole time. It is not extracted at context switch time.
So,
David Malone wrote:
On Tue, Aug 21, 2001 at 11:27:38AM -0500, Kevin Day wrote:
A quick peek at swtch.s seems to show that the SSE registers (XMM0-7) aren'
t
being preserved across context switches. Am I missing somewhere that's doin
g
this, or are they really not being saved now?
A quick peek at swtch.s seems to show that the SSE registers (XMM0-7) aren't
being preserved across context switches. Am I missing somewhere that's doing
this, or are they really not being saved now?
--
Kevin Day
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On Tue, Aug 21, 2001 at 11:27:38AM -0500, Kevin Day wrote:
A quick peek at swtch.s seems to show that the SSE registers (XMM0-7) aren't
being preserved across context switches. Am I missing somewhere that's doing
this, or are they really not being saved now?
SSE support has recently been
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