const-float128-ped.c: Require __float128 effective target and options.

const-float128-ped.c: Require __float128 effective target and options.

2016-07-01  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

	* gcc.dg/const-float128-ped.c: Require __float128 effective
	target and options.
	* gcc.dg/const-float128.c: Likewise.
	* gcc.dg/torture/float128-cmp-invalid.c: Require
	__float128 and base_quadfloat_support effective targets, and
	__float128 options.
	* gcc.dg/torture/float128-div-underflow.c: Likewise.
	* gcc.dg/torture/float128-extend-nan.c: Likewise.
	* gcc.dg/torture/float128-nan.c: Likewise.
	* gcc.dg/torture/fp-int-convert-float128-timode-2.c: Likewise.
	* gcc.dg/torture/fp-int-convert-float128-timode-3.c: Likewise.
	* gcc.dg/torture/fp-int-convert-float128-timode.c: Likewise.
	* lib/target-supports.exp (check_effective_target___float128):
	New.
	(add_options_for___float128): New.
	(check_effective_target_base_quadword_support): New.

From-SVN: r237924