Function vrsra_n_s8 

pub fn vrsra_n_s8(a: int8x8_t, b: int8x8_t, const N: i32) -> int8x8_t

Available on target feature neon and (AArch64 or ARM or ARM64EC) and (AArch64 or ARM64EC) and (AArch64 or ARM64EC or target feature v7) only.

Signed rounding shift right and accumulate Arm’s documentation