re PR target/64180 (PowerPC carry bit improvements)

re PR target/64180 (PowerPC carry bit improvements)

	PR target/64180
	* config/rs6000/predicates.md (unsigned_comparison_operator): New.
	(signed_comparison_operator): New.
	* config/rs6000/rs6000-protos.h (rs6000_emit_eqne): Declare.
	* config/rs6000/rs6000.c (rs6000_emit_eqne): New function.
	(rs6000_emit_sCOND): Remove ISEL test (move it to the expander).
	* config/rs6000/rs6000.md (add<mode>3 for SDI): Expand DImode
	add to addc,adde directly, if !TARGET_POWERPC64.
	(sub<mode>3 for SDI): Expand DImode sub to subfc,subfe directly,
	if !TARGET_POWERPC64.
	(neg<mode>2): Delete expander.
	(*neg<mode>2): Rename to "neg<mode>2".
	(addti3, subti3): Delete.
	(addti3, subti3): New expanders.
	(*adddi3_noppc64, *subdi3_noppc64, *negdi2_noppc64): Delete.
	(cstore<mode>4_unsigned): New expander.
	(cstore<mode>4): Allow GPR as output (not just SI).  Rewrite.
	(cstore<mode>4 for FP): Remove superfluous quotes.
	(*eq<mode>, *eq<mode>_compare, *plus_eqsi and splitter,
	*compare_plus_eqsi and splitter, *plus_eqsi_compare and splitter,
	*neg_eq0<mode>, *neg_eq<mode>, *ne0_<mode>, plus_ne0_<mode>,
	compare_plus_ne0_<mode> and splitter, *compare_plus_ne0_<mode>_1 and
	splitter, *plus_ne0_<mode>_compare and splitter, *leu<mode>,
	*leu<mode>_compare and splitter, *plus_leu<mode>, *neg_leu<mode>,
	*and_neg_leu<mode>, *ltu<mode>, *ltu<mode>_compare, *plus_ltu<mode>,
	*plus_ltu<mode>_1, *plus_ltu<mode>compare, *neg_ltu<mode>, *geu<mode>,
	*geu<mode>_compare and splitter, *plus_geu<mode>, *neg_geu<mode>,
	*and_neg_geu<mode>, *plus_gt0<mode>, *gtu<mode>, *gtu<mode>_compare,
	*plus_gtu<mode>, *plus_gtu<mode>_1, *plus_gtu<mode>_compare,
	*neg_gtu<mode>, 12 anonymous insns, and 12 anonymous splitters):
	Delete.
	(eq<mode>3, ne<mode>3): New.
	(*neg_eq_<mode>, *neg_ne_<mode>): New.
	(*plus_eq_<mode>, *plus_ne_<mode>): New.
	(*minus_eq_<mode>, *minus_ne_<mode>): New.

From-SVN: r218595