genopinit.c (optabs): Change lfloor_optab and lceil_optab to conversion optabs.

2006-10-29  Richard Guenther  <rguenther@suse.de>

	* genopinit.c (optabs): Change lfloor_optab and lceil_optab
	to conversion optabs.
	* optabs.c (init_optabs): Initialize lfloor_optab and lceil_optab
	as conversion optab.
	* optabs.h (enum optab_index): Remove OTI_lfloor and OTI_lceil.
	(enum convert_optab_index): Add COI_lfloor and COI_lceil.
	(lfloor_optab, lceil_optab): Adjust defines.
	* builtins.c (expand_builtin_int_roundingfn): Adjust for
	lfloor and lceil optabs now being conversion optabs.
	* config/i386/i386-protos.h (ix86_expand_lfloorceil): Declare.
	* config/i386/i386.c (ix86_expand_sse_compare_and_jump):
	New static helper function.
	(ix86_expand_lfloorceil): New function to expand lfloor and
	lceil inline.
	* config/i386/i386.md (lfloor<mode>2): Split into ...
	(lfloorxf<mode>2): ... x87 variant
	(lfloor<mode>di2, lfloor<mode>si2): ... and SSE variants
	using ix86_expand_lfloorceil.
	(lceil<mode>2, lceilxf<mode>2, lceil<mode>di2, lceil<mode>si2):
	Likewise.
	* doc/md.texi (lfloorMN, lceilMN): Document.

	* gcc.target/i386/math-torture/lfloor.c: New testcase.
	* gcc.target/i386/math-torture/lceil.c: Likewise.

From-SVN: r118143