IBM Z: arch14: New instrinsics

IBM Z: arch14: New instrinsics

This adds support for 5 new builtins.

gcc/ChangeLog:

	* config/s390/s390-builtin-types.def (BT_FN_V4SF_V8HI_UINT): New
	builtin signature.
	(BT_FN_V8HI_V8HI_UINT): Likewise.
	(BT_FN_V8HI_V4SF_V4SF_UINT): Likewise.
	* config/s390/s390-builtins.def (B_NNPA): New macro definition.
	(s390_vclfnhs, s390_vclfnls, s390_vcrnfs, s390_vcfn, s390_vcnf):
	New builtin definitions.
	* config/s390/s390-c.c (s390_cpu_cpp_builtins_internal): Bump
	vector extension version.
	* config/s390/s390.c (s390_expand_builtin): Check if builtins are
	available with current -march level.
	* config/s390/s390.md (UNSPEC_NNPA_VCLFNHS_V8HI)
	(UNSPEC_NNPA_VCLFNLS_V8HI, UNSPEC_NNPA_VCRNFS_V8HI)
	(UNSPEC_NNPA_VCFN_V8HI, UNSPEC_NNPA_VCNF_V8HI): New constants.
	* config/s390/vecintrin.h (vec_extend_to_fp32_hi): New macro.
	(vec_extend_to_fp32_lo): Likewise.
	(vec_round_from_fp32): Likewise.
	(vec_convert_to_fp16): Likewise.
	(vec_convert_from_fp16): Likewise.
	* config/s390/vx-builtins.md (vclfnhs_v8hi): New insn pattern.
	(vclfnls_v8hi): Likewise.
	(vcrnfs_v8hi): Likewise.
	(vcfn_v8hi): Likewise.
	(vcnf_v8hi): Likewise.

gcc/testsuite/ChangeLog:

	* gcc.target/s390/zvector/vec-nnpa-fp16-convert.c: New test.
	* gcc.target/s390/zvector/vec-nnpa-fp32-convert-1.c: New test.
	* gcc.target/s390/zvector/vec_convert_from_fp16.c: New test.
	* gcc.target/s390/zvector/vec_convert_to_fp16.c: New test.
	* gcc.target/s390/zvector/vec_extend_to_fp32_hi.c: New test.
	* gcc.target/s390/zvector/vec_extend_to_fp32_lo.c: New test.
	* gcc.target/s390/zvector/vec_round_from_fp32.c: New test.