backport: fpu-387.h (_FPU_MASK_ALL): New.

backport: fpu-387.h (_FPU_MASK_ALL): New.

	Backport from mainline
	2013-06-20  Uros Bizjak  <ubizjak@gmail.com>

	* config/fpu-387.h (_FPU_MASK_ALL): New.
	(_FPU_EX_ALL): Ditto.
	(set_fpu): Use fstcw to store x87 FPU control word. Use fnclex to
	clear stalled exception flags.  Correctly clear stalled SSE
	exception flags.  Simplify code.

	Backport from mainline
	2013-06-19  Uros Bizjak  <ubizjak@gmail.com>

	* config/fpu-387.h: Use __asm__ and __volatile__ consistently.

From-SVN: r200635