s390-protos.h (s390_alc_comparison): Add prototype.

	* config/s390/s390-protos.h (s390_alc_comparison): Add prototype.
	(s390_slb_comparison): Likewise.
	* config/s390/s390.c (s390_alc_comparison, s390_slb_comparison):
	New functions.
	* config/s390/s390.h (PREDICATE_CODES): Add s390_alc_comparison
	and s390_slb_comparison.
	* config/s390/s390.md ("*adddi3_31", "*subdi3_31"): Do not use on
	zSeries machines.
	("*adddi3_31z", "*subdi3_31z"): New insns.
	("*adddi3_alc_cc", "*adddi3_alc", "*subdi3_slb_cc", "*subdi3_slb",
	"*addsi3_alc_cc", "*addsi3_alc", "*subsi3_slb_cc", "*subsi3_slb"):
	New insns.

From-SVN: r72505