"""Offline decode of trek_emit.pkl: (1) DMA pairs -> per-page chains + TILE ids;
(2) emitter writes grouped by page, in address order, each word interpreted as
float / .8 fixed-point / byte fields; (3) hunt the payload structure (0x100 headers,
edge groups, z-sweeps) and candidate tile-local coordinate pairs."""
import pickle, struct, collections
S = r'C:\Users\cyd\AppData\Local\Temp\claude\c--VWE-TeslaRel410\4e848c76-6e89-4034-8047-d8d491cb32d8\scratchpad'
d = pickle.load(open(S + r'\trek_emit.pkl', 'rb'))
emits = d['emits']; dma = d['dma']

def asf(w):
    return struct.unpack('<f', struct.pack('<I', w & 0xffffffff))[0]

# ---- DMA chains: {addr, op} pairs ----
OPS = {0x1: 'SEND', 0x9: 'SENDE', 0x2: 'TILE', 0x3: 'TXDN', 0x6: 'FLUSH',
       0x0: 'GOTO', 0xf: 'STOP', 0x8: 'WAIT', 0x7: 'RETE'}
print("=== DMA stream (first 40 pairs) ===")
tiles = []
for i in range(0, min(len(dma) - 1, 80), 2):
    a, op = dma[i], dma[i + 1]
    code = (op >> 28) & 0xf
    name = OPS.get(code, '?')
    if name == 'TILE':
        tiles.append(a)
    if i < 80:
        print("  %08x  %s(%d)" % (a, name, op & 0x7f))
tile_all = [dma[i] for i in range(0, len(dma) - 1, 2)
            if ((dma[i + 1] >> 28) & 0xf) == 0x2]
print("TILE ids in stream: %d distinct: %s" %
      (len(tile_all), sorted(set(tile_all))[:30]))

# ---- emitter writes grouped by page ----
bypage = collections.defaultdict(list)
for qi, pc, a, w in emits:
    bypage[a >> 12].append((a, w, pc))
print("\n=== pages: %s ===" % {hex(k << 12): len(v) for k, v in bypage.items()})

# dump the densest page in address order
page, rows = max(bypage.items(), key=lambda kv: len(kv[1]))
rows = sorted(set((a, w) for a, w, pc in rows))
print("\n=== densest page %#x: %d words ===" % (page << 12, len(rows)))
for a, w in rows[:90]:
    f = asf(w)
    e = (w >> 23) & 0xff
    notes = []
    if 1e-5 < abs(f) < 1e5 and 1 < e < 254:
        notes.append("f=%.5g" % f)
    if 0 < w < 0x10000:
        notes.append("/256=%.2f" % (w / 256.0))
    b = [(w >> s) & 0xff for s in (24, 16, 8, 0)]
    if all(x < 0x80 for x in b) and any(x for x in b):
        notes.append("bytes=%s" % b)
    print("  %08x: %08x  %s" % (a, w, "  ".join(notes)))