Function vmlal_n_s32 

pub fn vmlal_n_s32(a: int64x2_t, b: int32x2_t, c: i32) -> int64x2_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.

Vector widening multiply accumulate with scalar Arm’s documentation