gistfile1.txt

macro if_nospec {
    ($cond:expr, $on_true:block, $on_false:block) => {
        {
            if core::hint::likely($cond) {
                core::sync::atomic::compiler_fence(core::sync::atomic::Ordering::SeqCst);
                #[allow(unused_unsafe)] unsafe {
                    core::arch::asm!("lfence");
                }
                $on_true 
            } else {
                #[allow(unused_unsafe)] unsafe {
                    core::arch::asm!("lfence");
                }
                $on_false 
            }
        }
    },
    ($cond:expr, $on_true:block) => {
        {
            if core::hint::likely($cond) {
                core::sync::atomic::compiler_fence(core::sync::atomic::Ordering::SeqCst);
                #[allow(unused_unsafe)] unsafe {
                    core::arch::asm!("lfence");
                }
                $on_true 
            }
        }
    }
}