[gcc]
2017-11-14  Michael Meissner  <meissner@linux.vnet.ibm.com>

	* config/rs6000/rs6000-c.c (is_float128_p): New helper function.
	(rs6000_builtin_type_compatible): Treat _Float128 and long double
	as being compatible if -mabi=ieeelongdouble.
	* config/rs6000/rs6000-builtin.def (BU_FLOAT128_HW_1): New macros
	to setup float128 built-ins with hardware support.
	(BU_FLOAT128_HW_2): Likewise.
	(BU_FLOAT128_HW_3): Likewise.
	(BU_FLOAT128_HW_VSX_1): Likewise.
	(BU_FLOAT128_HW_VSX_2): Likewise.
	(scalar_extract_expq): Change float128 built-in functions to
	accommodate having both KFmode and TFmode functions.  Use the
	KFmode variant as the default.
	(scalar_extract_sigq): Likewise.
	(scalar_test_neg_qp): Likewise.
	(scalar_insert_exp_q): Likewise.
	(scalar_insert_exp_qp): Likewise.
	(scalar_test_data_class_qp): Likewise.
	(sqrtf128_round_to_odd): Delete processing the round to odd
	built-in functions as special built-in functions, and define them
	as float128 built-ins.  Use the KFmode variant as the default.
	(truncf128_round_to_odd): Likewise.
	(addf128_round_to_odd): Likewise.
	(subf128_round_to_odd): Likewise.
	(mulf128_round_to_odd): Likewise.
	(divf128_round_to_odd): Likewise.
	(fmaf128_round_to_odd): Likewise.
	* config/rs6000/rs6000.c (rs6000_expand_binop_builtin): Add
	support for KFmode and TFmode xststdcqp calls.
	(rs6000_expand_builtin): If long double is IEEE 128-bit floating
	point, switch the built-in handlers for the get/set float128
	exponent, get float128 mantissa, float128 test built-ins, and the
	float128 round to odd built-in functions.  Eliminate creating the
	float128 round to odd built-in functions as special built-ins.
	(rs6000_init_builtins): Eliminate special creation of the float128
	round to odd built-in functions.
	* config/rs6000/vsx.md (xsxexpqp_<mode>): Change float128 built-in
	function insns to support both TFmode and KFmode variants.
	(xsxsigqp_<mode>): Likewise.
	(xsiexpqpf_<mode>): Likewise.
	(xsiexpqp_<mode>): Likewise.
	(xststdcqp_<mode>): Likewise.
	(xststdcnegqp_<mode>): Likewise.
	(xststdcqp_<mode>): Likewise.

[gcc/testsuite]
2017-11-14  Michael Meissner  <meissner@linux.vnet.ibm.com>

	* gcc.target/powerpc/float128-hw4.c: New test.

From-SVN: r254740