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[Lightning] Detecting use of floating point

From: Sandro Magi
Subject: [Lightning] Detecting use of floating point
Date: Fri, 22 Feb 2008 17:12:53 -0500

Is there any way to detect a change in floating point state? The
floating point state tends to be expensive to save and restore, so if
there's some sort of status flag that I can clear on context switch,
and check on the next context switch to indicate whether floating
point state has changed, it would save a significant amount of context
switch time.


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