Martin Povišer
f8325f66b7
opt_expr: Fix 'signed X>=0' replacement for wide output ports
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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 `$logic_not` cell, which does
zero-pad its output.
Fixes #3867 .
2023-08-01 13:50:12 +01:00
Martin Povišer
f0ae046c5a
opt_share: Fix input confusion with ANDNOT, ORNOT gates
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Distinguish between the A, B input ports of `$_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 `$_XNOR_` cells
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The previous mapping to `$_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
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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
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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.
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Fixes #3117 .
2021-12-20 18:40:14 +01:00
Marcelina Kościelnicka
e64456f920
extract_reduce: Refactor and fix input signal construction.
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Fixes #3047 .
2021-10-21 04:10:01 +02:00
Marcelina Kościelnicka
1f74ec3535
memory_share: Add -nosat and -nowiden options.
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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.
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Partial #2920 fix.
2021-08-08 01:19:22 +02:00
Marcelina Kościelnicka
8bdc019730
verilog: Emit $meminit_v2 cell.
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Fixes #2447 .
2021-07-28 23:18:38 +02:00
Marcelina Kościelnicka
436d42c00c
opt_expr: Propagate constants to port connections.
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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.
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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.
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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.
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Fixes #1854 .
2021-05-23 14:46:59 +02:00
Marcelina Kościelnicka
a23d9409e7
opt_mem: Remove write ports with const-0 EN.
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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.
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Fixes #2546 .
2021-03-15 17:16:53 +01:00
Marcelina Kościelnicka
f965b3fa54
rtlil: Disallow 0-width chunks in SigSpec.
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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 $alu in opt_share.
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These need to be the same length as actual Y, not visible part of Y.
Fixes #2538 .
2021-01-14 14:54:08 +01:00
Marcelina Kościelnicka
7670a89e1f
opt_clean: Better memory handling.
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Previously, `$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
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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
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Remove passes redundant with opt_dff
2020-08-20 16:21:58 +02:00
Marcelina Kościelnicka
2b777bbda8
opt_share: Refactor, fix some bugs.
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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.
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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.
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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.
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Fixes #2221 .
2020-07-05 06:31:58 +02:00
Kamil Rakoczy
39c39848a2
Add sub-assign and and-assign tests
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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
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Signed-off-by: Kamil Rakoczy <krakoczy@antmicro.com>
2020-06-25 14:19:16 +02:00
Kamil Rakoczy
f6d06c9f7b
Add xor-assignment test
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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
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Signed-off-by: Kamil Rakoczy <krakoczy@antmicro.com>
2020-06-24 11:56:26 +02:00
Claire Wolf
b3b515087d
Fix tests/opt/opt_rmdff
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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
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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