* config/rs6000/rs6000.c (rs6000_emit_sISEL): Let rs6000_emit_int_cmove

	* config/rs6000/rs6000.c (rs6000_emit_sISEL): Let rs6000_emit_int_cmove
	do all the work.
	(rs6000_emit_int_cmove): Use function pointers for insn generation.
	Don't force values into registers unnecessarily.
	(output_isel): Assert that we're not given conditions we can't handle.
	Delete corresponding code.
	* config/rs6000/rs6000.md (isel_signed_<mode>): Use
	scc_comparison_operator constraint.  Permit 0 for the consequent
	operand.  Permit any GPR for the alternative operand.
	(isel_unsigned_<mode>): Likewise.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@162263 138bc75d-0d04-0410-961f-82ee72b054a4