2006-10-28  Richard Guenther  <rguenther@suse.de>

	PR target/28806
	* builtins.c (expand_builtin_int_roundingfn_2): Expand
	BUILT_IN_LROUND and BUILT_IN_LLROUND from here.
	(expand_builtin): Adjust likewise.
	* genopinit.c (optabs[]): Add lround optab.
	* optabs.c (init_optabs): Initialize lround_optab.
	* optabs.h (enum convert_optab_index): Add COI_lround.
	(lround_optab): Define.
	* config/i386/i386-protos.h (ix86_expand_lround): Declare.
	* config/i386/i386.c (ix86_sse_copysign_to_positive): New
	static function.
	(ix86_expand_lround): New function.
	* config/i386/i386.md (lround<mode>di2, lround<mode>si2):
	New expanders.
	* doc/md.texi (lroundMN2): Document.

	* gcc.target/i386/math-torture/lround.c: New testcase.

From-SVN: r118105