I'm not sure your expected output is making sense as I think you have probably mis-counted the number of zeros in the second term because there is actually a run of eight zeros there.
$ perl -E 'say unpack q{b*}, pack q{N}, 0x01020304;'
10000000010000001100000000100000
As well as that, you seem to be parsing your data with the low-order bit first in each byte even though you have packed in network order. I would expect you bit vector to look like this
$ perl -E 'say unpack q{B*}, pack q{N}, 0x01020304;'
00000001000000100000001100000100
with expected output
7, -1, 6, -1, 7, -2, 5, -1, 2
Perhaps you could clarify your requirement.
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