Created
July 18, 2024 15:08
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| fn bitstripes (n) | |
| -1:u64 // ((1:u64 << n) | 1) | |
| fn logleveld (x) | |
| findmsb x | |
| fn tt->anf (x) | |
| w := (x == 0) 0 (logleveld x) | |
| S := (logleveld w) + 1 | |
| x := fold (x) for i in (range S) | |
| w := 1:u64 << i | |
| M0 := bitstripes w | |
| M1 := M0 << w | |
| k := x & M0 | |
| k | ((x & M1) ^ (k << w)) | |
| pass x S | |
| fn anf->tt (x S) | |
| fold (x) for i in (rrange S) | |
| w := 1:u64 << i | |
| M0 := bitstripes w | |
| M1 := M0 << w | |
| k := x & M0 | |
| k | ((x & M1) ^ (k << w)) | |
| for x in (range 256:u64) | |
| y S := tt->anf x | |
| x2 := anf->tt y S | |
| /nolines | |
| /bin x | |
| /anf y | |
| assert (x == x2) |
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