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Date: Thu, 25 Oct 2007 11:24:40 -0400
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From: DJ Delorie <dj AT delorie DOT com>
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Subject: Re: Using inline asm
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> Please can somebody explain me what mean "clobbered"?

In the case of gcc, it means "changes in a way that is not known to
gcc".  GCC will make no assumptions about the contents of the register
after the asm.