* config/m68k/tm-m68k.h (TARGET_LONG_DOUBLE_FORMAT): Define. (TARGET_LONG_DOUBLE_BIT): Define. (REGISTER_VIRTUAL_SIZE): Return 12 for floating point registers. (MAX_REGISTER_VIRTUAL_SIZE): Increase to 12. (REGISTER_VIRTUAL_TYPE): Return builtin_type_long_double for floating point registers. (REGISTER_CONVERTIBLE, REGISTER_CONVERT_TO_VIRTUAL) (REGISTER_CONVERT_TO_RAW): Remove. * config/m68k/xm-linux.h (HOST_LONG_DOUBLE_FORMAT): Define.