rs6000.c (struct processor_costs): Change semantics of fields to include the COST_N_I...

rs6000.c (struct processor_costs): Change semantics of fields to include the COST_N_INSNS scaling...

	* rs6000.c (struct processor_costs): Change semantics of fields to
	include the COST_N_INSNS scaling, and update all initializers.
	(rs6000_rtx_costs): Don't use COSTS_N_INSNS on rs6000_cost fields.
	Use COSTS_N_INSNS(1) for NOT, SIGN_EXTEND, ZERO_EXTEND and COMPARE.
	Use rs6000_cost->fp for both FLOAT_TRUNCATE and UNSPEC_FRSP.  When
	optimizing for size, use COSTS_N_INSNS(1) for CALL and IF_THEN_ELSE.

From-SVN: r84512