Commit Graph

100 Commits

Author SHA1 Message Date
Martin Povišer f8325f66b7 opt_expr: Fix 'signed X>=0' replacement for wide output ports
If the `$ge` cell we are replacing has wide output port, the upper bits
on the port should be driven to zero. That's not what a `$not` cell with
a single-bit input does. Instead opt for a `$logic_not` cell, which does
zero-pad its output.

Fixes #3867.
2023-08-01 13:50:12 +01:00
Martin Povišer f0ae046c5a opt_share: Fix input confusion with ANDNOT, ORNOT gates
Distinguish between the A, B input ports of `$_ANDNOT_`, `$_ORNOT_`
gates when considering those for sharing. Unlike the input ports of the
other supported single-bit gates, those are not interchangeable.

Fixes #3848.
2023-07-20 20:58:52 +01:00
Jannis Harder 661fa5ff92 simplemap: Map `$xnor` to `$_XNOR_` cells
The previous mapping to `$_XOR_` and `$_NOT_` predates the addition of
the `$_XNOR_` cell.
2022-11-29 19:06:45 +01:00
Jannis Harder 0113f44faa Reenable existing equiv_opt tests 2022-10-07 16:04:51 +02:00
Jannis Harder 81906aa627 Fix tests for check in equiv_opt 2022-10-07 16:04:51 +02:00
Claire Xenia Wolf f0478c520d Re-enable opt_dff_sr equiv_opt checks
Signed-off-by: Claire Xenia Wolf <claire@clairexen.net>
2022-10-07 16:04:51 +02:00
Marcelina Kościelnicka 606f1637ae Add memory_bmux2rom pass. 2022-05-18 22:48:55 +02:00
Jannis Harder ca5b910296 opt_merge: Add `-keepdc` option required for formal verification
The `-keepdc` option prevents merging flipflops with dont-care bits in
their initial value, as, in general, this is not a valid transform for
formal verification.

The keepdc option of `opt` is passed along to `opt_merge` now.
2022-04-01 21:03:20 +02:00
Marcelina Kościelnicka 07a657fb0c opt_reduce: Add $bmux and $demux optimization patterns. 2022-01-30 03:37:52 +01:00
Marcelina Kościelnicka f84c9d8e17 memory_share: Fix SAT-based sharing for wide ports.
Fixes #3117.
2021-12-20 18:40:14 +01:00
Marcelina Kościelnicka e64456f920 extract_reduce: Refactor and fix input signal construction.
Fixes #3047.
2021-10-21 04:10:01 +02:00
Marcelina Kościelnicka 1f74ec3535 memory_share: Add -nosat and -nowiden options.
This unlocks wide port recognition by default.
2021-08-14 00:09:04 +02:00
Marcelina Kościelnicka 9fdedf4d1c memory_dff: Recognize soft transparency logic. 2021-08-13 23:08:32 +02:00
Marcelina Kościelnicka 616ace2d92 Add new opt_mem_priority pass. 2021-08-13 11:58:52 +02:00
Marcelina Kościelnicka 24027b5446 proc_memwr: Use the v2 memwr cell. 2021-08-11 13:34:10 +02:00
Marcelina Kościelnicka fd79217763 Add v2 memory cells. 2021-08-11 13:34:10 +02:00
Marcelina Kościelnicka 98003430d6 opt_merge: Use FfInitVals.
Partial #2920 fix.
2021-08-08 01:19:22 +02:00
Marcelina Kościelnicka 8bdc019730 verilog: Emit $meminit_v2 cell.
Fixes #2447.
2021-07-28 23:18:38 +02:00
Marcelina Kościelnicka 436d42c00c opt_expr: Propagate constants to port connections.
This adds one simple piece of functionality to opt_expr: when a cell
port is connected to a fully-constant signal (as determined by sigmap),
the port is reconnected directly to the constant value.  This is just
enough optimization to fix the "non-constant $meminit input" problem
without requiring a full opt_clean or a separate pass.
2021-07-27 20:44:26 +02:00
Marcelina Kościelnicka 438bcc68c0 Add regression test for #2824. 2021-06-11 12:06:35 +01:00
Marcelina Kościelnicka 13b901bf1c memory_map: Improve start_offset handling.
Fixes #2775.
2021-05-31 17:45:21 +02:00
Marcelina Kościelnicka 5628f5a88f opt_mem_feedback: Respect write port priority. 2021-05-25 15:59:41 +02:00
Marcelina Kościelnicka 835688bf80 opt_mem_feedback: Rewrite feedback path finding logic.
Fixes #2766.
2021-05-24 23:20:30 +02:00
Marcelina Kościelnicka 1eea06bcc0 Add new helper class for merging FFs into cells, use for memory_dff.
Fixes #1854.
2021-05-23 14:46:59 +02:00
Marcelina Kościelnicka a23d9409e7 opt_mem: Remove write ports with const-0 EN.
Fixes #2765.
2021-05-23 14:30:56 +02:00
Marcelina Kościelnicka 5c1e6a0e20 opt_dff: Fix NOT gates wired in reverse. 2021-05-04 21:03:40 +02:00
Marcelina Kościelnicka 3af871f969 opt_clean: Remove init attribute bits together with removed DFFs.
Fixes #2546.
2021-03-15 17:16:53 +01:00
Marcelina Kościelnicka f965b3fa54 rtlil: Disallow 0-width chunks in SigSpec.
Among other problems, this also fixes equality comparisons between
SigSpec by enforcing a canonical form.

Also fix another minor issue with possible non-canonical SigSpec.

Fixes #2623.
2021-03-15 17:16:24 +01:00
Marcelina Kościelnicka a3528649c8 memory_dff: Remove now-useless write port handling. 2021-03-08 20:16:29 +01:00
Marcelina Kościelnicka 01626e6746 opt_share: Fix X and CO signal width for shifted $alu in opt_share.
These need to be the same length as actual Y, not visible part of Y.

Fixes #2538.
2021-01-14 14:54:08 +01:00
Marcelina Kościelnicka 7670a89e1f opt_clean: Better memory handling.
Previously, `$memwr` and `$meminit` cells were always preserved (along
with the memory itself).  With this change, they are instead part of the
main cell mark-and-sweep pass: a memory (and its `$meminit` and `$memwr`
cells) is only preserved iff any associated `$memrd` cell needs to be
preserved.
2020-10-08 18:05:51 +02:00
Xiretza bed14241ef
tests: add gitignores for auto-generated makefiles 2020-09-26 16:28:24 +02:00
Xiretza acd47bbd52
tests: Centralize test collection and Makefile generation 2020-09-21 15:07:02 +02:00
clairexen a96df40814
Merge pull request #2344 from YosysHQ/mwk/opt_share-fixes
opt_share: Refactor, fix some bugs.
2020-08-20 16:24:53 +02:00
clairexen 6a68b8ed54
Merge pull request #2328 from YosysHQ/mwk/opt_dff-cleanup
Remove passes redundant with opt_dff
2020-08-20 16:21:58 +02:00
Marcelina Kościelnicka 2b777bbda8 opt_share: Refactor, fix some bugs.
Fixes #2334.
Fixes #2335.
Fixes #2336.
2020-08-17 17:26:36 +02:00
Marcelina Kościelnicka a0e99a9f3f peepopt: Remove now-redundant dffmux pattern. 2020-08-07 13:21:34 +02:00
Marcelina Kościelnicka e89cc9c02f peepopt.muldiv: Add a signedness check.
Fixes #2318.
2020-08-04 16:30:24 +02:00
Marcelina Kościelnicka af6623ebb8 Add opt_dff pass. 2020-07-30 18:27:04 +02:00
Marcelina Kościelnicka dc18bf1969 opt_expr: Fix handling of $_XNOR_ cells with A = B.
Fixes #2311.
2020-07-29 12:41:43 +02:00
Marcelina Kościelnicka abe4e9e607 clk2fflogic: Support all FF types. 2020-07-24 03:19:48 +02:00
Marcelina Kościelnicka 7afcb72c98 opt_expr: Fix crash on $mul optimization with more zeros removed than Y has.
Fixes #2221.
2020-07-05 06:31:58 +02:00
Kamil Rakoczy 39c39848a2 Add sub-assign and and-assign tests
Signed-off-by: Kamil Rakoczy <krakoczy@antmicro.com>
2020-06-25 14:32:05 +02:00
Kamil Rakoczy 470df03f3d Move combined assign tests to single file
Signed-off-by: Kamil Rakoczy <krakoczy@antmicro.com>
2020-06-25 14:19:16 +02:00
Kamil Rakoczy f6d06c9f7b Add xor-assignment test
Signed-off-by: Kamil Rakoczy <krakoczy@antmicro.com>
2020-06-24 14:46:21 +02:00
Kamil Rakoczy a5ca4eeefb Add or-assignment and plus-assignment tests
Signed-off-by: Kamil Rakoczy <krakoczy@antmicro.com>
2020-06-24 11:56:26 +02:00
Claire Wolf b3b515087d Fix tests/opt/opt_rmdff
This only passed before because "prep" was also running opt_rmdff

Signed-off-by: Claire Wolf <claire@symbioticeda.com>
2020-06-09 22:48:26 +02:00
Eddie Hung 73b7ea713c
Merge pull request #1994 from YosysHQ/eddie/fix_bug1758
opt_expr: improve single-bit $and/$or/$xor/$xnor cells; gate cells too
2020-05-14 11:56:22 -07:00
Eddie Hung 5be4b00a0d opt_clean: improve warning message 2020-05-14 00:59:38 -07:00
Eddie Hung aa4a69f89b opt_clean: add init test 2020-05-14 00:31:08 -07:00