* config/aarch64/arm_neon.h (vrecpe_u32, vrecpeq_u32): Rewrite using
        builtin functions.
        (vfma_f32, vfmaq_f32, vfmaq_f64, vfma_n_f32, vfmaq_n_f32, vfmaq_n_f64,
        vfms_f32, vfmsq_f32, vfmsq_f64): Likewise.
        (vhsub_s8, vhsub_u8, vhsub_s16, vhsub_u16, vhsub_s32, vhsub_u32,
        vhsubq_s8, vhsubq_u8, vhsubq_s16, vhsubq_u16, vhsubq_s32, vhsubq_u32,
        vsubhn_s16, vsubhn_u16, vsubhn_s32, vsubhn_u32, vsubhn_s64, vsubhn_u66,
        vrsubhn_s16, vrsubhn_u16, vrsubhn_s32, vrsubhn_u32, vrsubhn_s64,
        vrsubhn_u64, vsubhn_high_s16, vsubhn_high_u16, vsubhn_high_s32,
        vsubhn_high_u32, vsubhn_high_s64, vsubhn_high_u64, vrsubhn_high_s16,
        vrsubhn_high_u16, vrsubhn_high_s32, vrsubhn_high_u32, vrsubhn_high_s64,
        vrsubhn_high_u64): Likewise.
        * config/aarch64/iterators.md (VDQ_SI): New mode iterator.
        * config/aarch64/aarch64.md (define_c_enum "unspec"): Add UNSPEC_URECPE.
        * config/aarch64/aarch64-simd.md (aarch64_urecpe<mode>): New pattern.
        * config/aarch64/aarch64-simd-builtins.def (shsub, uhsub, subhn, rsubhn,
        subhn2, rsubhn2, urecpe): New builtins.

Co-Authored-By: Haijian Zhang <z.zhanghaijian@huawei.com>
Co-Authored-By: Jiji Jiang <jiangjiji@huawei.com>
Co-Authored-By: Pengfei Sui <suipengfei@huawei.com>

From-SVN: r218484