Function vabal_s8 

pub fn vabal_s8(a: int16x8_t, b: int8x8_t, c: int8x8_t) -> int16x8_t

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

Signed Absolute difference and Accumulate Long Arm’s documentation