* config/rs6000/rs6000-protos.h (rs6000_emit_swrsqrtsf): Declare.
	* config/rs6000/rs6000.opt (swdiv): Change option to ...
	(recip): this.
	* config/rs6000/rs6000.c (rs6000_builtin_reciprocal): New
	function.
	(TARGET_BUILTIN_RECIPROCAL): Use it.
	(rs6000_builtin_expand): Expand recip, recipf, and rsqrtf.
	(rs6000_init_builtins): Initialize recip, recipf, and rsqrtf.
	(rs6000_emit_swrsqrtsf): New.
	* config/rs6000/rs6000.h (rs6000_builtins): Add recip, recipf, and
	rsqrtf. 
	* config/rs6000/rs6000.md (UNSPEC_RSQRT): Define.
	(divsf3): Remove swdiv support.
	(recipsf3): New.
	(rsqrtsf2): New.
	(rsqrt_internal1): New.
	(divdf3): Remove swdiv support.
	(reciptdf3): New.

From-SVN: r128719