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feat: SCJUMP guarded-DFS decode -> decision list (Task 2)

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Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This commit is contained in:
gamer147
2026-07-07 09:18:29 -04:00
parent 0b348a87d5
commit ad27167c95
2 changed files with 97 additions and 0 deletions
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14
tools/test_scjump.py
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@@ -16,7 +16,21 @@ def test_cfg_acyclic_and_dispatch():
expected = {1:0x81, 2:0x9f, 3:0x1ded, 4:0x1e6d, 5:0x54c1, 6:0x93c4, 7:0x1e868, 8:0x2aa42, 9:0x2b8a3}
check(disp == expected, f"chapter dispatch matches known offsets (got {disp})")
def test_decode_anchor_and_count():
scr = S.load_scjump()
decs = S.decode(scr)
check(len({d["site_offset"] for d in decs}) == 1755, f"1755 distinct decision sites (got {len({d['site_offset'] for d in decs})})")
# anchor: chapter 1, decision 0, guarded by 0x6d3 != 1
anchor = [d for d in decs if d["chapter"] == 1 and d["decision"] == 0]
check(len(anchor) >= 1, "chapter-1 decision 0 exists")
a = anchor[0]
has_chapter = any(g.get("global") == 0x3234 and g.get("op") == "==" and g.get("value") == 1 for g in a["guards"])
has_flag = any(g.get("global") == 0x6d3 and g.get("op") == "!=" and g.get("value") == 1 for g in a["guards"])
check(has_chapter, "anchor guarded by chapter_mode==1")
check(has_flag, "anchor guarded by 0x6d3!=1")
if __name__ == "__main__":
test_cfg_acyclic_and_dispatch()
test_decode_anchor_and_count()
print(f"\n{len(FAILS)} failures")
sys.exit(1 if FAILS else 0)