636a6b8cd2
Optimize complex combinational logic in DFG ( #6298 )
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This patch adds DfgLogic, which is a vertex that represents a whole,
arbitrarily complex combinational AstAlways or AstAssignW in the
DfgGraph.
Implementing this requires computing the variables live at entry to the
AstAlways (variables read by the block), so there is a new
ControlFlowGraph data structure and a classical data-flow analysis based
live variable analysis to do that at the variable level (as opposed to
bit/element level).
The actual CFG construction and live variable analysis is best effort,
and might fail for currently unhandled constructs or data types. This
can be extended later.
V3DfgAstToDfg is changed to convert the Ast into an initial DfgGraph
containing only DfgLogic, DfgVertexSplice and DfgVertexVar vertices.
The DfgLogic are then subsequently synthesized into primitive operations
by the new V3DfgSynthesize pass, which is a combination of the old
V3DfgAstToDfg conversion and new code to handle AstAlways blocks with
complex flow control.
V3DfgSynthesize by default will synthesize roughly the same constructs
as V3DfgAstToDfg used to handle before, plus any logic that is part of a
combinational cycle within the DfgGraph. This enables breaking up these
cycles, for which there are extensions to V3DfgBreakCycles in this patch
as well. V3DfgSynthesize will then delete all non synthesized or non
synthesizable DfgLogic vertices and the rest of the Dfg pipeline is
identical, with minor changes to adjust for the changed representation.
Because with this change we can now eliminate many more UNOPTFLAT, DFG
has been disabled in all the tests that specifically target testing the
scheduling and reporting of circular combinational logic.
2025-08-19 15:06:38 +01:00
8fbb725f34
Copyright year update.
2025-01-01 08:30:25 -05:00
ffe76717c6
Thread pool rewrite ( #5161 )
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Signed-off-by: Krzysztof Bieganski <kbieganski@antmicro.com>
Signed-off-by: Bartłomiej Chmiel <bchmiel@antmicro.com>
Signed-off-by: Arkadiusz Kozdra <akozdra@antmicro.com>
Co-authored-by: Krzysztof Bieganski <kbieganski@antmicro.com>
Co-authored-by: Arkadiusz Kozdra <akozdra@antmicro.com>
Co-authored-by: Wilson Snyder <wsnyder@wsnyder.org>
2024-08-23 08:36:49 -04:00
e76f29e5ba
Copyright year update
2024-01-01 03:19:59 -05:00
ae6ec411d0
Remove dead code from V3EmitV
2023-11-02 20:25:44 +00:00
28bd7e5b19
Rework multithreading handling to separate by code units that use/never use it. ( #4228 )
2023-09-24 22:12:23 -04:00
b24d7c83d3
Copyright year update
2023-01-01 10:18:39 -05:00
f1ea30f257
Use iterate*Const V3EmitV visitors. No functional change.
2022-04-23 14:47:12 +01:00
e931c6230a
Run EmitV test after all stages, and fix resulting fallout
2022-01-09 18:11:24 -05:00
441ecfedc9
Internals: Make all .h files compilable
2022-01-08 11:18:23 -05:00
ca42be982c
Copyright year update.
2022-01-01 08:26:40 -05:00
be31fdcfe4
Use Google-style-guide header guard naming, to avoid __ prefix.
2021-03-03 21:57:07 -05:00
bd602d0e2d
Copyright year update
2021-01-01 10:29:54 -05:00
b6ded59c2b
Internals: Use and enforce class final for ~5% performance boost.
2020-11-18 21:32:16 -05:00
993115d30a
Cleanup and test EmitV for internal coverage
2020-09-07 12:58:30 -04:00
a67ba04c37
Remove dead code and some unused parameters
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Found with CLion inspections
2020-06-01 17:49:42 +01:00
5c966ec510
clang-format many files. No functional change.
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Use nodist/clang_formatter to reformat files that are now clean.
2020-04-13 22:52:23 -04:00
1ce360ed5b
Add SPDX license identifiers. No functional change.
2020-03-21 11:24:24 -04:00
f23fe8fd84
Update copyright year.
2020-01-06 18:05:53 -05:00
5811ec07e6
Update URLs to https://verilator.org
2019-11-07 22:33:59 -05:00
771a301f66
Commentary: Remove newlines, upsets some patches. No functional change.
2019-10-04 20:17:11 -04:00
28b9db1903
Add AstVFile and AstTextBlock, towards bug1490.
2019-09-27 04:24:38 -04:00
b83b606267
Internals: Detab and fix spacing style issues. No functional change.
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When diff, recommend using "git diff --ignore-all-space"
When merging, recommend using "git merge -Xignore-all-space"
2019-05-19 16:13:13 -04:00
8a4aeddbb0
Copyright year update.
2019-01-03 19:17:22 -05:00
304a24d03a
Internals: Fix many clang-tidy issues. No functional change intended.
2018-10-14 18:39:33 -04:00
d87b9d25ca
Internals: Cleanup and standardize include order. No functional change intended.
2018-10-14 13:59:40 -04:00
94e8cf1de9
Internals: Use explicit std:: instead of using namespace std. No functional change intended.
2018-02-01 21:24:41 -05:00
8e65d93d6d
Copyright year update. No functional change.
2018-01-02 18:05:06 -05:00
e6d7e7e329
Version bump
2017-01-15 12:13:13 -05:00
b738d1960a
Copyright year update
2016-01-06 20:36:41 -05:00
4c91ade61d
Copyright year update
2015-01-07 18:25:53 -05:00
4422de0c6c
Copyright year update.
2014-01-06 19:28:57 -05:00
a8bbf7231b
Copyright year update.
2013-01-01 09:42:59 -05:00
c6e7d87960
Commentary - Remove author lines as amany contributors now
2012-05-24 19:19:48 -04:00
50edef4ab2
Add Emacs indentation line. No functional change
2012-04-12 21:08:20 -04:00
c2c7c7bd9a
Copyright year update
2012-01-15 10:26:28 -05:00
71c1f00ec2
Copyright year update
2011-01-01 18:21:19 -05:00
97adede70b
CDC: Fix columns mis-aligning when large filename paths
2010-01-15 09:30:20 -05:00
6aec0ce702
--cdc: Report in more typical source to dest order
2010-01-09 09:05:00 -05:00
bf860b21d7
Clock domain crossing checks
2010-01-07 16:41:19 -05:00
729dfdfed7
Copyright year update
2010-01-05 21:15:06 -05:00
7df730cedd
Verilator is now licensed under LGPL v3 and/or Artistic v2.0.
2009-05-04 17:07:57 -04:00
3d06720628
Copyright year update
2009-01-02 11:47:39 -05:00
ddbfc176b6
Internals: Create AstNodeSelItem in prep for future commits.
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No real functional change, outside of minor debug dump differences.
2008-11-20 07:55:54 -05:00
52912c6329
Convert repository to git from svn.
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- Change .cvsignore to .gitignore
- Remove Id metacomments
- Cleanup whitespace at end of lines
2008-06-09 21:25:10 -04:00
8e812058cb
Change website references to veripool.org
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git-svn-id: file://localhost/svn/verilator/trunk/verilator@1039 77ca24e4-aefa-0310-84f0-b9a241c72d87
2008-04-25 12:14:27 +00:00
a2ffe86a36
Copyright update
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git-svn-id: file://localhost/svn/verilator/trunk/verilator@976 77ca24e4-aefa-0310-84f0-b9a241c72d87
2008-01-15 14:29:08 +00:00
b5b1d94d4a
Copyright date update
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git-svn-id: file://localhost/svn/verilator/trunk/verilator@864 77ca24e4-aefa-0310-84f0-b9a241c72d87
2007-01-02 22:06:40 +00:00
3b554f4c5b
Rename config.h to config_build.h, and add cross compile notes.
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git-svn-id: file://localhost/svn/verilator/trunk/verilator@842 77ca24e4-aefa-0310-84f0-b9a241c72d87
2006-12-18 19:20:45 +00:00
ce10dbd11c
Version bump
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git-svn-id: file://localhost/svn/verilator/trunk/verilator@753 77ca24e4-aefa-0310-84f0-b9a241c72d87
2006-08-26 11:35:28 +00:00
Geza Lore
Wilson Snyder
Bartłomiej Chmiel
Mariusz Glebocki
Todd Strader