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prune paths that don't match initial conv state

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This commit is contained in:
Ahmet Inan 2026-02-15 09:56:25 +01:00
commit da6f94b7ad
1 changed files with 10 additions and 1 deletions
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11
pac_list_decoder.hh
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@ -152,12 +152,21 @@ public:
default: assert(false);
}
for (int i = 0; i < TYPE::SIZE; ++i)
if (((state[i] & 8064) >> 7) != ((state[i] & 126) >> 1))
metric[i] += 1000000;
int perm[TYPE::SIZE];
CODE::insertion_sort(perm, metric, TYPE::SIZE);
for (int i = 0, r = 0; rank != nullptr && i < TYPE::SIZE; ++i) {
if (i > 0 && metric[i-1] != metric[i])
++r;
rank[i] = r;
}
MAP acc = maps[count-1];
MAP acc;
for (int k = 0; k < TYPE::SIZE; ++k)
acc.v[k] = perm[k];
message[count-1] = vshuf(message[count-1], acc);
acc = vshuf(maps[count-1], acc);
for (int i = count-2; i >= 0; --i) {
message[i] = vshuf(message[i], acc);
acc = vshuf(maps[i], acc);