rs6000-c.c (P9V_BUILTIN_VEC_VSCEDPGT, [...]): Rename base overloaded name.

gcc/ChangeLog:

2018-10-25  Carl Love  <cel@us.ibm.com>

	* config/rs6000/rs6000-c.c (P9V_BUILTIN_VEC_VSCEDPGT,
	P9V_BUILTIN_VEC_VSCEDPLT, P9V_BUILTIN_VEC_VSCEDPEQ,
	P9V_BUILTIN_VEC_VSCEDPUO): Rename base overloaded name.  Add quad
	precicion entry for each overloaded builtin.
	* config/rs6000/rs6000-builtin.def (VSCEDPGT, VSCEDPLT, VSCEDPEQ,
	VSCEDPUO): Rename overloaded name.
	(VSCEDPGT, VSCEQPGT, VSCEDPLT, VSCEQPLT, VSCEDPEQ, VSCEQPEQ,
	VSCEDPUO, VSCEQPUO): Add defitions for overloaded builtins.
	* config/rs6000/vsx.md (xscmpexpqp_<code>_<mode>): Add
	define_expand for xscmpexqp instruction.
	(*xscmpexpqp): Add define_insn for the xscmpexqp instruction.

gcc/testsuite/ChangeLog:

2018-10-25  Carl Love  <cel@us.ibm.com>

	* gcc.target/powerpc/float128-cmp2-runnable.c: New test file.

From-SVN: r265509