K 10
svn:author
V 3
kib
K 8
svn:date
V 27
2012-07-18T15:43:47.136605Z
K 7
svn:log
V 495
On AMD64, provide siginfo.si_code for floating point errors when error
occurs using the SSE math processor.  Update comments describing the
handling of the exception status bits in coprocessors control words.

Remove GET_FPU_CW and GET_FPU_SW macros which were used only once.
Prefer to use curpcb to access pcb_save over the longer path of
referencing pcb through the thread structure.

Based on the submission by:	Ed Alley <wea llnl gov>
PR:	  amd64/169927
Reviewed by:	bde
MFC after:	3 weeks

END