t-linux64 (LIB2FUNCS_EXTRA): Add darwin-ldouble.c.

t-linux64 (LIB2FUNCS_EXTRA): Add darwin-ldouble.c.

	* config/rs6000/t-linux64 (LIB2FUNCS_EXTRA): Add darwin-ldouble.c.
	(SHLIB_MAPFILES): Add libgcc-ppc64.ver.
	(SHLIB_MKMAP_OPTS): Delete.
	(TARGET_LIBGCC2_CFLAGS): Add -specs.
	(bispecs): Add rule.
	* config/rs6000/libgcc-ppc64.ver: New file.
	* config/rs6000/ppc64-fp.c (__fixtfdi, __floatditf): New functions.
	(__floatdidf, __floatdisf): Optimize multiply.
	(__fixunstfdi): New function.
	* config/rs6000/rs6000.c (rs6000_complex_function_value): Allow for
	real and imag parts larger than one register.
	(function_arg): Correct type of reg used when fp arg split partially
	to stack.
	* config/rs6000/darwin-ldouble.c: Protect with #if !_SOFT_FLOAT
	and __MACH__ or __powerpc64__.

From-SVN: r77440