[AArch64][8/10] ARMv8.2-A FP16 two operands scalar intrinsics

[AArch64][8/10] ARMv8.2-A FP16 two operands scalar intrinsics

gcc/
	* config/aarch64/aarch64-simd-builtins.def: Register new builtins.
	* config/aarch64/aarch64.md (<FCVT_F2FIXED:fcvt_fixed_insn>hf<mode>3):
	New.
	(<FCVT_FIXED2F:fcvt_fixed_insn><mode>hf3): Likewise.
	(add<mode>3): Likewise.
	(sub<mode>3): Likewise.
	(mul<mode>3): Likewise.
	(div<mode>3): Likewise.
	(*div<mode>3): Likewise.
	(<fmaxmin><mode>3): Extend to HF.
	* config/aarch64/aarch64-simd.md (aarch64_rsqrts<mode>): Likewise.
	(fabd<mode>3): Likewise.
	(<FCVT_F2FIXED:fcvt_fixed_insn><VHSDF_HSDF:mode>3): Likewise.
	(<FCVT_FIXED2F:fcvt_fixed_insn><VHSDI_HSDI:mode>3): Likewise.
	(aarch64_fmulx<mode>): Likewise.
	(aarch64_fac<optab><mode>): Likewise.
	(aarch64_frecps<mode>): Likewise.
	(<FCVT_F2FIXED:fcvt_fixed_insn>hfhi3): New.
	(<FCVT_FIXED2F:fcvt_fixed_insn>hihf3): Likewise.
	* config/aarch64/iterators.md (VHSDF_SDF): Delete.
	(VSDQ_HSDI): Support HI.
	(fcvt_target, FCVT_TARGET): Likewise.
	* config/aarch64/arm_fp16.h (vaddh_f16, vsubh_f16, vabdh_f16,
	vcageh_f16, vcagth_f16, vcaleh_f16, vcalth_f16, vceqh_f16, vcgeh_f16,
	vcgth_f16, vcleh_f16, vclth_f16, vcvth_n_f16_s16, vcvth_n_f16_s32,
	vcvth_n_f16_s64, vcvth_n_f16_u16, vcvth_n_f16_u32, vcvth_n_f16_u64,
	vcvth_n_s16_f16, vcvth_n_s32_f16, vcvth_n_s64_f16, vcvth_n_u16_f16,
	vcvth_n_u32_f16, vcvth_n_u64_f16, vdivh_f16, vmaxh_f16, vmaxnmh_f16,
	vminh_f16, vminnmh_f16, vmulh_f16, vmulxh_f16, vrecpsh_f16,
	vrsqrtsh_f16): New.

From-SVN: r238723