Function emit_systolic_bist_wrapper 

pub fn emit_systolic_bist_wrapper(core: &str, k: usize, n: usize) -> String

The self-test wrapper a weight-stationary tile core is signed off in: a 64-bit LFSR drives the k int8 activation lanes and the n registered outputs fold into a MISR, so only clk, rst and sig cross the block’s boundary and no pad shapes its timing.