* config/rs6000/rs6000.h (MASK_ALTIVEC_ABI,
	MASK_LONG_DOUBLE_128): Delete.
	(MASK_AIX_STRUCT_RET, MASK_AIX_STRUCT_RET_SET,
	TARGET_AIX_STRUCT_RET): New flags.
	(TARGET_SWITCHES): Remove entries for -mlong-double-128 and
	-mlong-double-64.  Add entries for -m(no-)aix-struct-return
	and -m(no-)svr4-struct-return.
	(TARGET_OPTIONS): Add entry for -mlong-double-.
	(rs6000_long_double_size_string, rs6000_long_double_type_size,
	rs6000_altivec_abi): Declare.
	(TARGET_LONG_DOUBLE_128, TARGET_ALTIVEC_ABI,
	LONG_DOUBLE_TYPE_SIZE): Change definitions to match.
	(RETURN_IN_MEMORY): If !TARGET_AIX_STRUCT_RET, return
	structures of size <= 8 bytes in registers.
	(PRINT_OPERAND_PUNCT_VALID_P): Take out '$' and '*'.

	* config/rs6000/rs6000.c (rs6000_long_double_size_string,
	rs6000_long_double_type_size, rs6000_altivec_abi): New
	globals.
	(rs6000_override_options): Set rs6000_long_double_type_size
	from rs6000_long_double_size_string, if nonzero.  Set the
	MASK_AIX_STRUCT_RET bit in target_flags from DEFAULT_ABI, if
	not already set.
	(rs6000_parse_abi_options): Set rs6000_altivec_abi, not a
	target_flags bit.
	(rs6000_init_builtins): This hook now takes no arguments.

	* config/rs6000/netbsd.h, config/rs6000/linux.h: Define
	DRAFT_V4_STRUCT_RET to 1.

From-SVN: r47541