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The binop precedence table already had land/lor/lxor/lsl/lsr/asr (iter 0 setup) but eval-op fell through to 'unknown operator' for all of them. SX doesn't expose host bitwise primitives, so each is implemented in eval.sx via arithmetic on the host: land/lor/lxor: mask & shift loop, accumulating 1<<k digits lsl k: repeated * 2 k times lsr k: repeated floor (/ 2) k times asr: aliased to lsr (no sign extension at our bit width) bits.ml baseline: popcount via 'while m > 0 do if m land 1 = 1 then ... ; m := m lsr 1 done'. Sum of popcount(1023, 5, 1024, 0xff) = 10 + 2 + 1 + 8 = 21. 5 land 3 = 1 5 lor 3 = 7 5 lxor 3 = 6 1 lsl 8 = 256 256 lsr 4 = 16 41 baseline programs total.