Function svset4_u8 

pub fn svset4_u8<const IMM_INDEX: i32>(
    tuple: svuint8x4_t,
    x: svuint8_t,
) -> svuint8x4_t

🔬This is a nightly-only experimental API. (stdarch_aarch64_sve #145052)

Available on (AArch64 or ARM64EC) and target feature sve only.

Change one vector in a tuple of four vectors Arm’s documentation