Function svnmsb_f64_m 

pub fn svnmsb_f64_m(
    pg: svbool_t,
    op1: svfloat64_t,
    op2: svfloat64_t,
    op3: svfloat64_t,
) -> svfloat64_t

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

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

Negated multiply-subtract, multiplicand first Arm’s documentation