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1098 Commits

Author SHA1 Message Date
Alberto Gonzalez b5ecbbef94
Allow reading file input from stdin, improving REPL experience. 2020-04-15 16:15:50 +00:00
Miodrag Milanović 3c4758c60e
Merge pull request #1894 from YosysHQ/mingw_fix 
Fix compile for mingw
 2020-04-15 17:43:31 +02:00
Eddie Hung dc3d432aaa
Merge pull request #1916 from YosysHQ/eddie/kernel_makeblackbox 
kernel: Module::makeblackbox() to clear connections too
 2020-04-15 08:42:39 -07:00
N. Engelhardt 0b7a5879e5
Merge pull request #1830 from boqwxp/qbfsat 
Add `qbfsat` command to integrate exists-forall solving and specialization
 2020-04-15 17:33:50 +02:00
Miodrag Milanovic bc21e58bb5 Fix compile for mingw 2020-04-15 16:38:09 +02:00
Eddie Hung 635b2b8939 kernel: Design::remove(RTLIL::Module *) to check refcount_modules_ 2020-04-14 09:31:06 -07:00
Eddie Hung 9547d8c13e kernel: Module::makeblackbox() to clear connections too 2020-04-13 20:37:22 -07:00
Alberto Gonzalez c479fdeb85
Add `dict` support for rvalue references and C++11 move semantics. 2020-04-13 23:52:16 +00:00
Miodrag Milanovic 0d789c5a3b Support custom PROGRAM_PREFIX 2020-04-10 10:38:40 +02:00
whitequark 7c06cb6157
Merge pull request #1562 from whitequark/write_cxxrtl 
write_cxxrtl: new backend
 2020-04-10 01:24:31 +00:00
Eddie Hung 371af7da38
Merge pull request #1858 from YosysHQ/eddie/fix1856 
kernel: include "kernel/constids.inc"
 2020-04-09 14:23:47 -07:00
Eddie Hung 60ffc21e64 kernel: include "kernel/constids.inc" instead of "constids.inc" 2020-04-09 09:14:03 -07:00
Marcelina Kościelnicka 516857f3ba [NFCI] Deduplicate builtin FF cell types list 
A few passes included the same list of FF cell types.  Make it a global
const instead.

The zinit pass also seems to include a list like that, but given that
it seems to be completely broken at the time (see #1568 discussion),
I'm going to pretend I didn't see that.
 2020-04-09 18:05:06 +02:00
whitequark d20e971725 write_cxxrtl: new backend. 
This commit adds a basic implementation that isn't very performant
but implements most of the planned features.
 2020-04-09 04:08:36 +00:00
Alberto Gonzalez a4598d64ef
Hole value recovery and specialization implementation for `qbfsat` command. 2020-04-04 22:13:25 +00:00
Eddie Hung 956ecd48f7 kernel: big fat patch to use more ID::*, otherwise ID(*) 2020-04-02 09:51:32 -07:00
Eddie Hung 2d86563bb2 kernel: IdString::in(const IdString &) as per @Tjoppen 2020-04-02 07:14:08 -07:00
Eddie Hung 18d85b88ae kernel: fix formatting (thanks @boqwxp) 2020-04-02 07:14:08 -07:00
Eddie Hung 7bcbf0c9d1 kernel: use C++11 fold hack to prevent recursion 2020-04-02 07:14:08 -07:00
Eddie Hung ba13a40ef4 Revert "kernel: IdString:in() to use perfect forwarding" 
This reverts commit 7b2a85aedf24affc2e1202c78e70e6a317f5bf29.
 2020-04-02 07:14:08 -07:00
Eddie Hung 6d4f01c3fa kernel: separate IdString::put_reference() out to help inlining 2020-04-02 07:14:08 -07:00
Eddie Hung 4a8cecf03e kernel: IdString:in() to use perfect forwarding 2020-04-02 07:14:08 -07:00
Eddie Hung 164dd0f6b2 kernel: Use constids.inc for global/constant IdStrings 2020-04-02 07:14:08 -07:00
Eddie Hung 37f42fe102
Merge pull request #1845 from YosysHQ/eddie/kernel_speedup 
kernel: speedup by using more pass-by-const-ref
 2020-04-02 07:13:33 -07:00
Eddie Hung c90324662c
Merge pull request #1828 from YosysHQ/eddie/celltypes_speedup 
kernel: share a single CellTypes within a pass
 2020-04-01 14:17:45 -07:00
Alberto Gonzalez ae05795f54
Clean up pseudo-private member usage in `kernel/yosys.cc`. 2020-04-01 02:53:56 +00:00
Eddie Hung 348e892314 kernel: pass-by-value into Design::scratchpad_set_string() too 2020-03-27 12:21:09 -07:00
Rupert Swarbrick 044ca9dde4 Add support for SystemVerilog-style `define to Verilog frontend 
This patch should support things like

  `define foo(a, b = 3, c)   a+b+c

  `foo(1, ,2)

which will evaluate to 1+3+2. It also spots mistakes like

  `foo(1)

(the 3rd argument doesn't have a default value, so a call site is
required to set it).

Most of the patch is a simple parser for the format in preproc.cc, but
I've also taken the opportunity to wrap up the "name -> definition"
map in a type, rather than use multiple std::map's.

Since this type needs to be visible to code that touches defines, I've
pulled it (and the frontend_verilog_preproc declaration) out into a
new file at frontends/verilog/preproc.h and included that where
necessary.

Finally, the patch adds a few tests in tests/various to check that we
are parsing everything correctly.
 2020-03-27 16:08:26 +00:00
Eddie Hung 6ca7844cec kernel: const Wire* overload -> Wire* !!! 2020-03-26 16:21:30 -07:00
Eddie Hung f97b90e40b kernel: Cell::set{Port,Param}() to pass by value, but use std::move 
Otherwise cell->setPort(ID::A, cell->getPort(ID::B)) could be invalid
 2020-03-26 14:33:06 -07:00
Eddie Hung 7ad7f41bc5 kernel: share a single CellTypes within a pass 2020-03-18 12:21:40 -07:00
Eddie Hung 940640ac44 kernel: SigSpec copies to not trigger pack() 2020-03-18 11:51:00 -07:00
Eddie Hung 4555b5b819 kernel: more pass by const ref, more speedups 2020-03-18 11:21:53 -07:00
Eddie Hung 8b12e97153 kernel: speedup 2020-03-18 08:48:36 -07:00
Eddie Hung 8c45ea9f0e kernel: use const reference for SigSet too 2020-03-17 10:22:33 -07:00
Eddie Hung bc51e609cb kernel: fix DeleteWireWorker 2020-03-17 10:22:16 -07:00
Claire Wolf ed4fa19ba2 Update Copyright 
Signed-off-by: Claire Wolf <claire@symbioticeda.com>
 2020-03-16 16:28:25 +01:00
Waldir Pimenta 418c069561 License: bump year and add title 2020-03-14 16:46:07 +00:00
Miodrag Milanovic 395daf6ced exclude clang from checking 2020-03-13 17:23:27 +01:00
Miodrag Milanovic 8f221118d2 Add YS_ prefix to macros, add explanation and apply to older version as well 2020-03-13 17:19:54 +01:00
Eddie Hung 432a09af80 kernel: SigSpec use more const& + overloads to prevent implicit SigSpec 2020-03-13 08:17:39 -07:00
Miodrag Milanovic 7c54e61979 Use boost xpressive for gcc 4.8 2020-03-13 14:58:35 +01:00
Eddie Hung b567f03c26 kernel: optimise Module::remove(const pool<RTLIL::Wire*>() 2020-03-12 16:00:34 -07:00
Eddie Hung a076052fe4 kernel: SigPool to use const& + overloads to prevent implicit SigSpec 2020-03-12 16:00:34 -07:00
jiegec 7b679eecb3 Fix compilation for emcc 2020-03-11 22:09:24 +08:00
David Shah b8abf14376 Add ScriptPass::run_nocheck and use for abc9 
Signed-off-by: David Shah <dave@ds0.me>
 2020-03-09 14:34:22 +00:00
Claire Wolf b597f85b13
Merge pull request #1718 from boqwxp/precise_locations 
Closes #1717. Add more precise Verilog source location information to AST and RTLIL nodes.
 2020-03-03 08:38:32 -08:00
Eddie Hung 0f4c1906bb Small fixes 2020-02-27 10:29:53 -08:00
Eddie Hung 78929e8c3d Fixes for older compilers 2020-02-27 10:17:29 -08:00
Eddie Hung 6bb3d9f9c0 Make TimingInfo::TimingInfo(SigBit) constructor explicit 2020-02-27 10:17:29 -08:00
Eddie Hung 9dcf204dec TimingInfo: index by (port_name,offset) 2020-02-27 10:17:29 -08:00
Eddie Hung 7c3b4b80ea Fix spacing 2020-02-27 10:17:29 -08:00
Eddie Hung 1ef1ca812b Get rid of (* abc9_{arrival,required} *) entirely 2020-02-27 10:17:29 -08:00
Eddie Hung a6fec9fe60 abc9_ops: use TimingInfo for -prep_{lut,box} too 2020-02-27 10:17:29 -08:00
Eddie Hung 3ea5506f81 abc9_ops: use TimingInfo for -prep_{lut,box} too 2020-02-27 10:17:29 -08:00
Eddie Hung cda4acb544 abc9_ops: add and use new TimingInfo struct 2020-02-27 10:17:29 -08:00
Miodrag Milanović 036c46de1e
Merge pull request #1705 from YosysHQ/logger_pass 
Logger pass
 2020-02-26 13:32:49 +01:00
Miodrag Milanovic 1c569fe06a Remove duplicate warning detection 2020-02-23 10:56:27 +01:00
Alberto Gonzalez f0afd65035
Closes #1717. Add more precise Verilog source location information to AST and RTLIL nodes. 2020-02-23 07:22:26 +00:00
Miodrag Milanovic d079ab9d19 Handle expect no warnings together with expected 2020-02-22 10:52:46 +01:00
Miodrag Milanovic 70db8e9200 Prevent double error message 2020-02-17 16:46:34 +01:00
Miodrag Milanovic 5641b0248f Option to expect no warnings 2020-02-17 15:36:06 +01:00
Miodrag Milanovic be977cf7eb No new error if already failing 2020-02-17 12:54:36 +01:00
Miodrag Milanovic 6b396e6455 remove whitespace 2020-02-14 13:12:05 +01:00
Miodrag Milanovic 31b7a9c312 Add expect option to logger command 2020-02-14 12:21:16 +01:00
Eddie Hung b523ecf2f4 specify: system timing checks to accept min:typ:max triple 2020-02-13 12:42:15 -08:00
Claire Wolf 5f53ea2b5b
Merge pull request #1659 from YosysHQ/clifford/experimental 
Add log_experimental() and experimental() API and "yosys -x"
 2020-01-29 15:25:03 +01:00
Eddie Hung 6d27d43727 Add and use SigSpec::reverse() 2020-01-28 10:37:16 -08:00
Claire Wolf 5c2508cef8 Improve logging use of experimental features 
Signed-off-by: Claire Wolf <clifford@clifford.at>
 2020-01-28 17:51:50 +01:00
Claire Wolf cef607c8b7 Add log_experimental() and experimental() API and "yosys -x" 
Signed-off-by: Claire Wolf <clifford@clifford.at>
 2020-01-27 18:27:47 +01:00
Claire Wolf de6006fbc8
Merge pull request #1613 from porglezomp-misc/version-flag-alias 
Add --version and -version as aliases for -V
 2020-01-27 12:59:27 +01:00
Eddie Hung ade57058f7 As before, only display MEM if Linux or FreeBSD 2020-01-14 11:38:48 -08:00
Eddie Hung a901a5fb44 print_stats footer to return peak memory, option for including children 2020-01-14 11:25:23 -08:00
Eddie Hung 67c9c41f7e Move abc9.* constpad entries to Abc9Pass::on_register() 2020-01-09 17:10:54 -08:00
Eddie Hung dd718838bb Merge remote-tracking branch 'origin/clifford/onpassreg' into eddie/abc9_scratchpad 2020-01-09 17:06:13 -08:00
Clifford Wolf cd92a974f4 Add Pass::on_register() and Pass::on_shutdown() 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2020-01-09 21:36:34 +01:00
Eddie Hung fbd9636e08 Add abc9.if.script.flow{,2} to constpad 2020-01-08 12:15:01 -08:00
Eddie Hung a63e2508fc Add RTLIL::constpad, init by yosys_setup(); use for abc9 2020-01-08 10:52:08 -08:00
Cassie Jones b76b023584 Add --version and -version as aliases for -V 
The flag --version is commonly accepted by command line tools.
The code for the version flags added here matches the pattern used for
the help flag aliases, for consistency.

Fixes #1612
 2020-01-05 03:19:02 -05:00
Clifford Wolf 3edb2e708b Always create $shl, $shr, $sshl, $sshr cells with unsigned B inputs 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2020-01-02 18:58:45 +01:00
whitequark e97e33d00d kernel: require \B_SIGNED=0 on $shl, $sshl, $shr, $sshr. 
Before this commit, these cells would accept any \B_SIGNED and in
case of \B_SIGNED=1, would still treat the \B input as unsigned.

Also fix the Verilog frontend to never emit such constructs.
 2019-12-04 11:59:36 +00:00
Eddie Hung 6bf7114bbd Fix for SigSpec() == SigSpec(State::Sx, 0) to be true again 2019-10-04 16:45:36 -07:00
Eddie Hung 279fd22ddf Add Const::{begin,end,empty}() 2019-10-04 15:00:57 -07:00
Eddie Hung 62c66406ad log_dump() to support State enum 2019-10-02 17:49:07 -07:00
Eddie Hung d963e8c2c6 Fix typo 2019-09-30 15:18:40 -07:00
Miodrag Milanović 0d27ffd4e6
Merge pull request #1416 from YosysHQ/mmicko/frontend_binary_in 
Open aig frontend as binary file
 2019-09-30 17:49:23 +02:00
Eddie Hung d5f0794a53
Merge pull request #1414 from hzeller/improve-replace-with-empty-map 
Avoid work in replace() if rules empty.
 2019-09-29 19:35:23 -07:00
Miodrag Milanovic 3f70c1fd26 Open aig frontend as binary file 2019-09-29 13:22:11 +02:00
Henner Zeller 8c2b4f0a50 Avoid work in replace() if rules empty. 
This speeds up processing when number of bits are large but there
is actually nothing to replace. Adresses part of #1382.

Signed-off-by: Henner Zeller <h.zeller@acm.org>
 2019-09-29 00:17:40 -07:00
Miodrag Milanovic d0493925ec Support binary files for backends, fixes #1407 2019-09-28 09:36:18 +02:00
Miodrag Milanovic 435300f930 Make read/write gzip files on macos works, fixes #1357 2019-09-26 19:35:12 +02:00
Eddie Hung 9a84e4711c Spacing 2019-09-13 16:30:44 -07:00
Eddie Hung 5473e597bf Use template specialisation 2019-09-13 11:13:57 -07:00
Eddie Hung 95e80809a5 Revert "SigSet<Cell*> to use stable compare class" 
This reverts commit 4ea34aaacd.
 2019-09-13 09:49:15 -07:00
Eddie Hung c487a8ff25 Grammar 2019-09-12 12:00:34 -07:00
Eddie Hung c05a403dd1 static_assert to enforce this going forward 2019-09-12 11:45:17 -07:00
Eddie Hung 4ea34aaacd SigSet<Cell*> to use stable compare class 2019-09-12 11:45:02 -07:00
Clifford Wolf e9f3eb9760 Bump year in copyright notice 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-08-22 18:43:16 +02:00
Clifford Wolf 2a78a1fd00
Merge pull request #1283 from YosysHQ/clifford/fix1255 
Fix various NDEBUG compiler warnings
 2019-08-17 15:07:16 +02:00
Eddie Hung 3b19c3657c Move namespace alias 2019-08-16 19:37:11 +00:00
Eddie Hung 0b9ee4fbbf Try this for gcc-4.8? 2019-08-15 16:20:54 -07:00
Eddie Hung 453a9429b6 Fix spacing 2019-08-15 14:54:41 -07:00
Eddie Hung 52355f5185 Use more ID::{A,B,Y,blackbox,whitebox} 2019-08-15 14:50:10 -07:00
Clifford Wolf 49301b733e
Merge branch 'master' into clifford/fix1255 2019-08-15 22:44:38 +02:00
Eddie Hung 4cfefae21e More use of IdString::in() 2019-08-15 09:23:57 -07:00
Clifford Wolf 0c5db07cd6 Fix various NDEBUG compiler warnings, closes #1255 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-08-13 13:29:03 +02:00
Clifford Wolf b25cf36856 Add YOSYS_NO_IDS_REFCNT configuration macro 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-08-11 12:23:16 +02:00
Clifford Wolf 390bf459fb Use ID() in kernel/*, add simple ID:: hack (to be improved upon later) 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-08-11 11:39:46 +02:00
Clifford Wolf 8222c5735e More improvements and cleanups in IdString subsystem 
- better use of "inline" keyword
- deprecate "sticky" IDs feature
- improve handling of empty ID
- add move constructor

Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-08-11 11:39:46 +02:00
Clifford Wolf b5534b66c8 Improve API of ID() macro 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-08-11 11:39:46 +02:00
Clifford Wolf f54bf1631f
Merge pull request #1258 from YosysHQ/eddie/cleanup 
Cleanup a few barnacles across codebase
 2019-08-10 09:52:14 +02:00
Eddie Hung 6d77236f38 substr() -> compare() 2019-08-07 12:20:08 -07:00
Eddie Hung 71eff6f0de RTLIL::S{0,1} -> State::S{0,1} for headers 2019-08-07 11:14:03 -07:00
Eddie Hung 7164996921 RTLIL::S{0,1} -> State::S{0,1} 2019-08-07 11:12:38 -07:00
Eddie Hung e6d5147214 Merge remote-tracking branch 'origin/master' into eddie/cleanup 2019-08-07 11:11:50 -07:00
Eddie Hung 48d0f99406 stoi -> atoi 2019-08-07 11:09:17 -07:00
Clifford Wolf 9260e97aa2 Automatically prune init attributes in verific front-end, fixes #1237 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-08-07 15:31:49 +02:00
Clifford Wolf e9a756aa7a
Merge pull request #1213 from YosysHQ/eddie/wreduce_add 
wreduce/opt_expr: improve width reduction for $add and $sub cells
 2019-08-07 14:27:35 +02:00
Clifford Wolf c5d56fbe2d
Merge pull request #1253 from YosysHQ/clifford/check 
Be less aggressive with running design->check()
 2019-08-07 12:14:41 +02:00
Clifford Wolf 338f6765eb Tweak default gate costs, cleanup "stat -tech cmos" 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-08-07 10:25:51 +02:00
Eddie Hung 234fcf1724 Fix typos 2019-08-06 19:07:45 -07:00
Eddie Hung c11ad24fd7 Use std::stoi instead of atoi(<str>.c_str()) 2019-08-06 16:45:48 -07:00
Eddie Hung e38f40af5b Use IdString::begins_with() 2019-08-06 16:42:25 -07:00
Eddie Hung 3486235338 Make liberal use of IdString.in() 2019-08-06 16:18:18 -07:00
Clifford Wolf 100c377451 Redesign of cell cost API 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-08-07 01:12:14 +02:00
Eddie Hung 84f52aee0d Add SigSpec::extract_end() convenience function 2019-08-06 15:25:11 -07:00
Eddie Hung 0b56be8c56 Restore original SigSpec::extract() 2019-08-06 15:24:55 -07:00
Eddie Hung 26cb3e7afc Merge remote-tracking branch 'origin/master' into eddie/wreduce_add 2019-08-06 14:50:00 -07:00
Clifford Wolf 95a6582f34 Be less aggressive with running design->check() 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-08-06 19:21:37 +02:00
David Shah 27360ceda6 Add support for writing gzip-compressed files 
Signed-off-by: David Shah <dave@ds0.me>
 2019-08-06 17:43:04 +01:00
Clifford Wolf 023086bd46 Add $_NMUX_, add "abc -g cmos", add proper cmos cell costs 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-08-06 04:47:55 +02:00
Miodrag Milanovic f767179c75 New mxe hacks needed to support 2ca237e 2019-08-01 17:28:07 +02:00
Miodrag Milanovic 3e4307c104 Fix case when file does not exist 2019-07-29 12:29:13 +02:00
David Shah 6538671c84
Merge pull request #1226 from YosysHQ/dave/gzip 
Add support for gzip'd input files
 2019-07-27 07:40:38 +01:00
David Shah da6701c4cd Fix frontend auto-detection for gzipped input 
Signed-off-by: David Shah <dave@ds0.me>
 2019-07-26 10:29:05 +01:00
David Shah 933db0410e Add support for reading gzip'd input files 
Signed-off-by: David Shah <dave@ds0.me>
 2019-07-26 10:23:58 +01:00
Jakob Wenzel 70882a8070 replaced std::iterator with using statements 2019-07-25 09:51:09 +02:00
Jakob Wenzel 25685a9a5b made ObjectIterator extend std::iterator 
this makes it possible to use std algorithms on them
 2019-07-24 16:35:40 +02:00
Eddie Hung 54708dfbd7 Add an SigSpec::at(offset, defval) convenience method 2019-07-19 13:54:57 -07:00
Eddie Hung 25ff27e37f SigSpec::extract to take negative lengths 2019-07-19 12:34:04 -07:00
Eddie Hung 06f94c92d4 Revert "Add log_checkpoint function and use it in opt_muxtree" 
This reverts commit 0e6c83027f.
 2019-07-15 08:35:48 -07:00
Clifford Wolf 44fd459c79 Redesign log_id_cache so that it doesn't keep IdString instances referenced, fixes #1178 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-07-15 17:10:42 +02:00
Clifford Wolf 0e6c83027f Add log_checkpoint function and use it in opt_muxtree 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-07-15 12:12:21 +02:00
Clifford Wolf ef07a313b4
Merge pull request #1162 from whitequark/rtlil-case-attrs 
Allow attributes on individual switch cases in RTLIL
 2019-07-09 16:56:29 +02:00
Eddie Hung 41d7d9d24b Clarify script -scriptwire doc 2019-07-08 19:21:21 -07:00
whitequark 93bc5affd3 Allow attributes on individual switch cases in RTLIL. 
The parser changes are slightly awkward. Consider the following IL:

    process $0
      <point 1>
      switch \foo
        <point 2>
        case 1'1
          assign \bar \baz
          <point 3>
          ...
        case
      end
    end

Before this commit, attributes are valid in <point 1>, and <point 3>
iff it is immediately followed by a `switch`. (They are essentially
attached to the switch.) But, after this commit, and because switch
cases do not have an ending delimiter, <point 3> becomes ambiguous:
the attribute could attach to either the following `case`, or to
the following `switch`. This isn't expressible in LALR(1) and results
in a reduce/reduce conflict.

To address this, attributes inside processes are now valid anywhere
inside the process: in <point 1> and <point 3> a part of case body,
and in <point 2> as a separate rule. As a consequence, attributes
can now precede `assign`s, which is made illegal in the same way it
is illegal to attach attributes to `connect`.

Attributes are tracked separately from the parser state, so this
does not affect collection of attributes at all, other than allowing
them on `case`s. The grammar change serves purely to allow attributes
in more syntactic places.
 2019-07-08 11:34:58 +00:00
Eddie Hung f1504696e5 Use Pass::call_on_module() as per @cliffordwolf comments 2019-07-02 08:20:37 -07:00
Eddie Hung 02ba85b133 script -select -> script -scriptwire 2019-07-02 08:17:26 -07:00
Eddie Hung 06971385fa Support ability for "script -select" to take commands from wires 2019-06-28 13:36:33 -07:00
Eddie Hung da5f830395
Merge pull request #1098 from YosysHQ/xaig 
"abc9" pass for timing-aware techmapping (experimental, FPGA only, no FFs)
 2019-06-28 10:59:03 -07:00