[PATCH] math-emu: Add support for reporting exact invalid exception

[David Miller]

From: Kumar Gala <galak at kernel.crashing.org>
Date: Thu, 21 Aug 2008 07:50:21 -0500

> Some architectures (like powerpc) provide status information on the exact
> type of invalid exception.  This is pretty straight forward as we already
> report invalid exceptions via FP_SET_EXCEPTION.
> 
> We add new flags (FP_EX_INVALID_*) the architecture code can define if it
> wants the exact invalid exception reported.
> 
> We had to split out the INF/INF and 0/0 cases for divide to allow reporting
> the two invalid forms properly.
> 
> Signed-off-by: Kumar Gala <galak at kernel.crashing.org>

Acked-by: David S. Miller <davem at davemloft.net>