* libgcc2.c (CEXT): When compiling L_multc3 and L_divtc3,
	define to "l" if LIBGCC_LONG_DOUBLE_SIZE == 128,
	otherwise define to LIBGCC2_TF_CEXT.
	* config/i386/linux64.h (LIBGCC2_HAS_TF_MODE): New define.
	(LIBGCC_TF_CEXT): Ditto.
	(TF_SIZE): Ditto.

From-SVN: r125737