rs6000-c.c (altivec_overloaded_builtins): Add definitions for vec_float, vec_float2, vec_floato, vec_floate built-ins.

gcc/ChangeLog:

2017-06-16  Carl Love  <cel@us.ibm.com>

	* config/rs6000/rs6000-c.c (altivec_overloaded_builtins): Add
	definitions for vec_float, vec_float2, vec_floato,
	vec_floate built-ins.
	* config/rs6000/vsx.md (define_c_enum "unspec"): Add RTL code
	for instructions vsx_xvcvsxws vsx_xvcvuxwsp, float2, floato and
	floate.
	* config/rs6000/rs6000-builtin.def (FLOAT2_V2DI, FLOATE_V2DF,
	FLOATE_2DI, FLOATO_V2DF, FLOATEE_V2DI, XVCVSXWSP_V4SF,
	UNS_FLOATO_V2DI, UNS_FLOATE_V2DI): Add definitions.
	* config/altivec.md (define_insn "p8_vmrgew_<mode>",
	define_mode_attr VF_sxddp): Add V4SF type to p8_vmrgew.
	* config/rs6000/altivec.h (vec_float, vec_float2, vec_floate,
	vec_floato): Add builtin defines.
	* doc/extend.texi (vec_float, vec_float2, vec_floate, vec_floato):
	Update the built-in documentation file for the new built-in
	functions.

gcc/testsuite/ChangeLog:

2017-06-16  Carl Love  <cel@us.ibm.com>

	* gcc.target/powerpc/builtins-3-runnable.c (test_result_sp,
	main): Add runnable tests and test checker for vec_float,
	vec_float2, vec_floate and vec_floato builtins.

From-SVN: r249311