Add UNITS_PER_ARG missed in patch.

Co-Authored-By: David Edelsohn <edelsohn@gnu.org>

From-SVN: r73152

gcc/ChangeLog

@@ -6,6 +6,8 @@
 	(rs6000_function_value): Widen integral return value to mode based
 	on TARGET_32BIT, not word_mode.
 	* config/rs6000/rs6000.h (PROMOTE_MODE): Likewise.
+	(UNITS_PER_ARG): New.
+	(RS6000_ARG_SIZE): Use it.
 
 2003-10-31  Gerald Pfeifer  <gerald@pfeifer.com>
 

gcc/config/rs6000/rs6000.h

@@ -1764,10 +1764,12 @@ typedef struct rs6000_args
 /* Define intermediate macro to compute the size (in registers) of an argument
    for the RS/6000.  */
 
+#define UNITS_PER_ARG (TARGET_32BIT ? 4 : 8)
+
 #define RS6000_ARG_SIZE(MODE, TYPE)					\
 ((MODE) != BLKmode							\
- ? (GET_MODE_SIZE (MODE) + (UNITS_PER_WORD - 1)) / UNITS_PER_WORD	\
- : (int_size_in_bytes (TYPE) + (UNITS_PER_WORD - 1)) / UNITS_PER_WORD)
+ ? (GET_MODE_SIZE (MODE) + (UNITS_PER_ARG - 1)) / UNITS_PER_ARG		\
+ : (int_size_in_bytes (TYPE) + (UNITS_PER_ARG - 1)) / UNITS_PER_ARG)
 
 /* Initialize a variable CUM of type CUMULATIVE_ARGS
    for a call to a function whose data type is FNTYPE.