Robert O'Callahan
3a5742ffd2
Improve commutative hashing.
...
The simple XOR `commutative_eat()` implementation produces a lot of collisions.
https://www.preprints.org/manuscript/201710.0192/v1/download is a useful reference on this topic.
Running the included `hashTest.cc` without the hashlib changes, I get 49,580,349 collisions.
The 49,995,000 (i,j) pairs (0 <= i < 10000, i < j < 10000) hash into only 414,651 unique hash values.
We get simple collisions like (0,1) colliding with (2,3).
With the hashlib changes, we get only 707,099 collisions and 49,287,901 unique hash values.
Much better! The `commutative_hash` implementation corresponds to `Sum(4)` in the paper
mentioned above.
2025-08-19 21:45:52 +00:00
Robert O'Callahan
2654bd5355
Compute is_port in AbcPass without iterating through all cells and wires in the module every time we run ABC.
...
This does not scale when we run ABC thousands of times in a single AbcPass.
2025-08-14 22:29:45 +00:00
Robert O'Callahan
4bf7c23e2b
Make pool const lookup methods take a lookup path that never rehashes the table.
...
This avoids the need to cast away `const` and makes these methods thread-compatible.
2025-07-17 23:40:35 +00:00
Robert O'Callahan
cf9720ecab
Make const lookup methods take a lookup path that never rehashes the table.
...
This avoids the need to cast away `const` and makes these methods
thread-compatible.
2025-07-17 23:40:26 +00:00
mikesinouye
93780bb869
Add <optional> to haslib.h which uses std::optional
2025-05-06 09:57:03 -07:00
Emil J. Tywoniak
aa01ef3312
hashlib: simplify loopback. NFC
2025-01-20 16:15:48 +01:00
Emil J. Tywoniak
901935fbce
hashlib: merge hash_ops with hash_top_ops for plugin compat
2025-01-14 21:41:33 +01:00
Emil J. Tywoniak
a58481e9b7
mark all hash_into methods nodiscard
2025-01-14 12:39:15 +01:00
Emil J. Tywoniak
a2805b15c9
hashlib: fix hash_obj_ops discarding hash value
2025-01-14 12:36:24 +01:00
mikesinouye
de9cb5a60c
Remove spurious prime
2025-01-02 11:05:30 -08:00
mikesinouye
1ae0d8432f
Approximately double the max hash table size
2025-01-02 08:59:11 -08:00
Emil J. Tywoniak
026e9dae9d
hashlib: fixes from jix
2024-12-18 15:09:25 +01:00
Emil J. Tywoniak
ed70038aa1
hashlib: fixes from jix
2024-12-18 15:09:25 +01:00
Emil J. Tywoniak
b9b9515bb0
hashlib: hash_eat -> hash_into
2024-12-18 15:09:25 +01:00
Emil J. Tywoniak
0a525f38c2
hashlib: declare YS_HASHING_VERSION = 1
2024-12-18 15:09:25 +01:00
Emil J. Tywoniak
1df8a3e64b
hashlib: legacy mkhash_add -> djb2_add
2024-12-18 15:09:25 +01:00
Emil J. Tywoniak
4e29ec1854
hashlib: acc -> eat
2024-12-18 15:09:25 +01:00
Emil J. Tywoniak
79acc141d5
hashlib: add deprecated mkhash function to prevent plugin breakage
2024-12-18 14:58:53 +01:00
Emil J. Tywoniak
ad0dc17711
docs: document the ideas behind the hashing interface
2024-12-18 14:58:31 +01:00
Emil J. Tywoniak
0dafe06cd4
hashlib: run_hash uses hash_top_ops, not hash_ops
2024-12-18 14:58:31 +01:00
Emil J. Tywoniak
02a578365a
hashlib: remove is_new from HasherDJB32, implement hash_top for IdString
2024-12-18 14:58:31 +01:00
Emil J. Tywoniak
52b0fc03b7
hash: solo hashing interface, override for SigBit
2024-12-18 14:58:31 +01:00
Emil J. Tywoniak
4d14399749
hashlib: allow forcing Hasher state, use it for IdString trivial hashing
2024-12-18 14:58:31 +01:00
Emil J. Tywoniak
c1af19fabc
hashlib: don't xorshift in between upper and lower word
2024-12-18 14:58:31 +01:00
Emil J. Tywoniak
209ab6fb72
hashlib: fudge always
2024-12-18 14:58:31 +01:00
Emil J. Tywoniak
582259f770
hashlib: hash_t can be set to 64-bit
2024-12-18 14:58:31 +01:00
Emil J. Tywoniak
b8738e2bd7
hashlib: use hash_t across the board
2024-12-18 14:58:31 +01:00
Emil J. Tywoniak
c73c88033d
hashlib: only include in one place
2024-12-18 14:58:31 +01:00
Emil J. Tywoniak
db04788c18
hashlib: fix pyosys
2024-12-18 14:58:31 +01:00
Emil J. Tywoniak
953508f6d2
driver: add --hash-seed
2024-12-18 14:58:29 +01:00
Emil J. Tywoniak
d071489ab1
hashlib: redo interface for flexibility
2024-12-18 14:49:25 +01:00
Mike Inouye
1e3973c5cb
Explictly #include <variant> for std::variant usage.
...
Signed-off-by: Mike Inouye <mikeinouye@google.com>
2024-10-07 21:57:30 +00:00
Emily Schmidt
fbee31080e
add optional header and hashlib implementation for optional
2024-08-21 11:04:11 +01:00
Emily Schmidt
248d5f72d4
add support for std::variant to hashlib
2024-08-21 11:01:09 +01:00
Emil J
051d83205d
Merge pull request #4471 from georgerennie/hashlib_primes
...
hashlib: Add some more primes
2024-07-29 15:10:22 +02:00
Emil J. Tywoniak
583db7b15e
sigmap: comments
2024-07-18 16:02:11 +02:00
George Rennie
339d4e8932
hashlib: Correct prime sequence
2024-07-02 08:10:18 +01:00
George Rennie
78ae4ed9ac
hashlib: Add some more primes
...
* Add some primes as suggested in #4458 . This allows larger hashtables
to be allocated for very big designs
2024-07-01 12:37:41 +01:00
Martin Povišer
66479a2232
hashlib: Add missing stdint.h include
...
We use `uint32_t` `uint64_t` etc. so add an explicit include.
2024-02-08 14:27:12 +00:00
Claire Xenia Wolf
fb72dc1a40
Add constexpr hashlib default constructors
...
Signed-off-by: Claire Xenia Wolf <claire@clairexen.net>
2023-12-29 19:20:44 +01:00
Martin Povišer
189064b8da
rtlil, hashlib: Remove deprecated std::iterator usage
...
`std::iterator` has been deprecated in C++17. Yosys is being compiled
against the C++11 standard but plugins can opt to compile against a
newer one. To silence some deprecation warnings when those plugins are
being compiled, replace the `std::iterator` inheritance with the
equivalent type declarations.
2023-12-09 19:01:39 +01:00
Rasmus Munk Larsen
8e0308b5e7
Revert changes to celltypes.h. Use dict instead of std::unordered_map and most hash function for uint64_t to hashlib.h to support this.
2023-10-03 14:25:59 -07:00
Wanda
c172fef01a
hashlib: Use a better hash for pool.
2023-09-26 18:55:06 +01:00
gatecat
52c8c28d2c
Add recover_names pass to recover names post-mapping
2023-05-25 10:55:07 +02:00
Aki Van Ness
6717e02023
kernel: hashlib: cleaned up message about table size in cases where sizeof(int) == 4, ( closes #3440 )
2022-08-25 11:08:51 -04:00
Claire Xenia Wolf
72787f52fc
Fixing old e-mail addresses and deadnames
...
s/((Claire|Xen|Xenia|Clifford)\s+)+(Wolf|Xen)\s+<(claire|clifford)@(symbioticeda.com|clifford.at|yosyshq.com)>/Claire Xenia Wolf <claire@yosyshq.com>/gi;
s/((Nina|Nak|N\.)\s+)+Engelhardt\s+<nak@(symbioticeda.com|yosyshq.com)>/N. Engelhardt <nak@yosyshq.com>/gi;
s/((David)\s+)+Shah\s+<(dave|david)@(symbioticeda.com|yosyshq.com|ds0.me)>/David Shah <dave@ds0.me>/gi;
s/((Miodrag)\s+)+Milanovic\s+<(miodrag|micko)@(symbioticeda.com|yosyshq.com)>/Miodrag Milanovic <micko@yosyshq.com>/gi;
s,https?://www.clifford.at/yosys/,http://yosyshq.net/yosys/,g ;
2021-06-08 00:39:36 +02:00
Marcelina Kościelnicka
dbfd0b61e3
hashlib: Add a hash for bool.
2021-05-24 22:02:15 +02:00
Alberto Gonzalez
d71a9badda
dict: Remove guard for past-the-end iterators that might mask problems in static analysis.
...
Co-Authored-By: whitequark <whitequark@whitequark.org>
2020-06-19 21:04:29 +00:00
Alberto Gonzalez
e5a2d17b5d
hashlib, rtlil: Add operator+=() to dict<>::iterator and dict<>::const_iterator and add operator+() and operator+=() to ObjIterator.
2020-06-19 17:44:29 +00:00
Alberto Gonzalez
6eea4b3d79
kernel: Try an order-independent approach to hashing dict.
...
Co-Authored-By: David Shah <dave@ds0.me>
Co-Authored-By: Eddie Hung <eddie@fpgeh.com>
2020-05-19 23:32:53 +00:00
