gcc/
	PR target/61415
	* config/rs6000/rs6000-builtin.def (BU_MISC_1): Delete.
	(BU_MISC_2): Rename to ...
	(BU_LDBL128_2): ... this.
	* config/rs6000/rs6000.h (RS6000_BTM_LDBL128): New define.
	(RS6000_BTM_COMMON): Add RS6000_BTM_LDBL128.
	* config/rs6000/rs6000.c (rs6000_builtin_mask_calculate): Handle
	RS6000_BTM_LDBL128.
	(rs6000_invalid_builtin): Add long double 128-bit builtin support.
	(rs6000_builtin_mask_names): Add RS6000_BTM_LDBL128.
	* config/rs6000/rs6000.md (unpacktf_0): Remove define)expand.
	(unpacktf_1): Likewise.
	* doc/extend.texi (__builtin_longdouble_dw0): Remove documentation.
	(__builtin_longdouble_dw1): Likewise.
	* doc/sourcebuild.texi (longdouble128): Document.

gcc/testsuite/
	PR target/61415
	* lib/target-supports.exp (check_effective_target_longdouble128): New.
	* gcc.target/powerpc/pack02.c: Use it.
	* gcc.target/powerpc/tfmode_off.c: Likewise.

From-SVN: r211653