Function vmull_s32 

pub fn vmull_s32(a: int32x2_t, b: int32x2_t) -> 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.

Signed multiply long Arm’s documentation