[PATCH] aarch64: Use type-qualified builtins for UHSUB Neon intrinsics

[Jonathan Wright via Gcc-patches]

Hi,

This patch declares unsigned type-qualified builtins and uses them to
implement halving-subtract Neon intrinsics. This removes the need for
many casts in arm_neon.h.

Bootstrapped and regression tested on aarch64-none-linux-gnu - no
issues.

Ok for master?

Thanks,
Jonathan

---

gcc/ChangeLog:

2021-11-09  Jonathan Wright  <jonathan.wri...@arm.com>

        * config/aarch64/aarch64-simd-builtins.def: Use BINOPU type
        qualifiers in generator macros for uhsub builtins.
        * config/aarch64/arm_neon.h (vhsub_s8): Remove unnecessary
        cast.
        (vhsub_s16): Likewise.
        (vhsub_s32): Likewise.
        (vhsub_u8): Use type-qualified builtin and remove casts.
        (vhsub_u16): Likewise.
        (vhsub_u32): Likewise.
        (vhsubq_s8): Remove unnecessary cast.
        (vhsubq_s16): Likewise.
        (vhsubq_s32): Likewise.
        (vhsubq_u8): Use type-qualified builtin and remove casts.
        (vhsubq_u16): Likewise.
        (vhsubq_u32): Likewise.

rb15036.patch
Description: rb15036.patch