rs6000-builtin.def (BU_FLOAT128_1_HW): New macros to support float128 built-in functions that require the ISA 3.0 hardware.

[gcc]
2017-09-14  Michael Meissner  <meissner@linux.vnet.ibm.com>

	* config/rs6000/rs6000-builtin.def (BU_FLOAT128_1_HW): New macros
	to support float128 built-in functions that require the ISA 3.0
	hardware.
	(BU_FLOAT128_3_HW): Likewise.
	(SQRTF128): Add support for the IEEE 128-bit square root and fma
	built-in functions.
	(FMAF128): Likewise.
	(FMAQ): Likewise.
	* config/rs6000/rs6000.c (rs6000_builtin_mask_calculate): Add
	support for built-in functions that need the ISA 3.0 IEEE 128-bit
	floating point instructions.
	(rs6000_invalid_builtin): Likewise.
	(rs6000_builtin_mask_names): Likewise.
	* config/rs6000/rs6000.h (MASK_FLOAT128_HW): Likewise.
	(RS6000_BTM_FLOAT128_HW): Likewise.
	(RS6000_BTM_COMMON): Likewise.
	* config/rs6000/rs6000.md (fma<mode>4_hw): Add a generator
	function.
	* doc/extend.texi (RS/6000 built-in functions): Document the
	IEEE 128-bit floating point square root and fused multiply-add
	built-in functions.

[gcc/testsuite]
2017-09-14  Michael Meissner  <meissner@linux.vnet.ibm.com>

	* gcc.target/powerpc/abs128-1.c: Use __builtin_fabsf128 instead of
	__builtin_fabsq.
	* gcc.target/powerpc/float128-5.c: Use __builtin_fabsf128 instead
	of __builtin_fabsq.  Prevent the test from running on 32-bit.
	* gcc.target/powerpc/float128-fma1.c: New test.
	* gcc.target/powerpc/float128-fma2.c: Likewise.
	* gcc.target/powerpc/float128-sqrt1.c: Likewise.
	* gcc.target/powerpc/float128-sqrt2.c: Likewise.

From-SVN: r252771