why does mask ?d work but mask ?a not?

[klong]

Thank you for keeping it going...
I've attached the results of a benchmark test that interrupted due to an error
and tried out a few example hashes. The results are in the second attachment.

Greetings
Klong



  examples.txt (Size: 1.72 KB / Downloads: 2)

  benchmark_intel_hd4000.txt (Size: 2.55 KB / Downloads: 1)