This patch implements a set of low-level builtins for instruction
which would otherwise not be emitted by the compiler plus a set of
high-level builtins as defined by the IBM XL compiler.  The high-level
builtins will be described in a future revision of the z/OS XL C/C++
Programming Guide.

I'll try to come up with a documentation appropriate for the GCC
manual as well (sometimes in the future).

gcc/ChangeLog:

2017-03-24  Andreas Krebbel  <krebbel@linux.vnet.ibm.com>

	* config/s390/s390-builtins.def: Add VXE builtins.  Add a flags
	argument to the overloaded builtin variants.  Use the new flag to
	deprecate certain builtin variants.
	* config/s390/s390-builtin-types.def: Add new builtin types.
	* config/s390/s390-builtins.h: Support new flags field for
	overloaded builtins.
	* config/s390/s390-c.c (OB_DEF_VAR): New flags field.
	(s390_macro_to_expand): Enable vector float data type.
	(s390_cpu_cpp_builtins_internal): Indicate support of the new
	builtins by incrementing the __VEC__ version number.
	(s390_expand_overloaded_builtin): Support expansion of vec_xl and
	vec_xst.
	(s390_resolve_overloaded_builtin): Emit error messages depending
	on the builtin flags.
	* config/s390/s390.c (s390_expand_builtin): Support additional
	flags argument.  Change error message to match the messages
	emitted in s390-c.c.
	* config/s390/s390.md: New UNSPEC_* constants.
	(op_type): Add new instruction types.
	* config/s390/vecintrin.h: Add new builtins and test data class
	constants.
	* config/s390/vx-builtins.md (V_HW_32_64): Add V4SF.
	(V_HW_4, VEC_HW, VECF_HW): New mode iterators.
	(VEC_INEXACT, VEC_NOINEXACT): New constants.
	("vec_splats<mode>", "vec_insert<mode>", "vec_promote<mode>")
	("vec_insert_and_zero<mode>", "vec_mergeh<mode>")
	("vec_mergel<mode>"): V_HW -> VEC_HW.

	("vlrlrv16qi", "vstrlrv16qi", "vbpermv16qi", "vec_msumv2di")
	("vmslg", "*vftci<mode>_cconly", "vftci<mode>_intcconly")
	("*vftci<mode>", "vftci<mode>_intcc", "vec_double_s64")
	("vec_double_u64", "vfmin<mode>", "vfmax<mode>"): New definition.

	("and_av2df3", "and_cv2df3", "vec_andc_av2df3")
	("vec_andc_cv2df3", "xor_av2df3", "xor_cv2df3", "vec_nor_av2df3")
	("vec_nor_cv2df3", "ior_av2df3", "ior_cv2df3", "vec_nabs")
	("*vftcidb", "*vftcidb_cconly", "vftcidb"): Remove definition.

	("vec_all_<fpcmpcc:code>v2df", "vec_any_<fpcmpcc:code>v2df")
	("vec_scatter_elementv4si_DI", "vec_cmp<fpcmp:code>v2df")
	("vec_di_to_df_s64", "vec_di_to_df_u64", "vec_df_to_di_u64")
	("vfidb", "*vldeb", "*vledb", "*vec_cmp<insn_cmp>v2df_cconly")
	("vec_cmpeqv2df_cc", "vec_cmpeqv2df_cc", "vec_cmphv2df_cc")
	("vec_cmphev2df_cc", "*vec_cmpeqv2df_cc")
	("*vec_cmphv2df_cc", "*vec_cmphev2df_cc"): Enable new modes as ...

	("vec_all_<fpcmpcc:code><mode>", "vec_any_<fpcmpcc:code><mode>")
	("vec_scatter_element<V_HW_4:mode>_DI")
	("vec_cmp<fpcmp:code><mode>", "vcdgb", "vcdlgb", "vclgdb")
	("vec_fpint<mode>", "vflls")
	("vflrd", "*vec_cmp<insn_cmp><mode>_cconly", "vec_cmpeq<mode>_cc")
	("vec_cmpeq<mode>_cc", "vec_cmph<mode>_cc", "vec_cmphe<mode>_cc")
	("*vec_cmpeq<mode>_cc", "*vec_cmph<mode>_cc")
	("*vec_cmphe<mode>_cc"): ... these.

	("vec_ctd_s64", "vec_ctsl", "vec_ctul", "vec_st2f"): Use rounding
	mode constant instead of magic value.

gcc/testsuite/ChangeLog:

2017-03-24  Andreas Krebbel  <krebbel@linux.vnet.ibm.com>

	* gcc.target/s390/target-attribute/tattr-3.c: Adjust error message
	and remove the high-level builtin.  The error message for the
	would prevent compilation from reaching the second.
	* gcc.target/s390/target-attribute/tattr-4.c: Likewise.

From-SVN: r246459