172: a MISSING sign bias is evidence of a shift, not a division -- the values are non-negative in
the source but cc1 cannot know that after a conditional, so the absence of the addiu is the
diagnostic. Finding 97 read backwards.
173: the absolute value is a SWAPPED SUBTRACTION (subu with operands exchanged), not negu -- the
natural -x is the trap. Second instance of finding 101.
174: the idiom-redundant-by-construction class, and the discipline of declining a row. Worker E
decoded 0x800FECF8 -- one of the highest-scoring fresh small rows -- and RELEASED it without
attempting it, because it is a magic-division row where every division has several equally
plausible spellings. A high redundancy score is not sufficient if the row is in a class known to
be spelling-ambiguous.
Christopher Williams
773cb88dcf