nmigen.git
2 years agoback.pysim: reset timeline as well.
whitequark [Wed, 8 Jul 2020 07:12:00 +0000 (07:12 +0000)]
back.pysim: reset timeline as well.

This is a bug that was introduced in 94faf497b.

2 years agoback.pysim: simplify. NFC.
whitequark [Wed, 8 Jul 2020 06:29:34 +0000 (06:29 +0000)]
back.pysim: simplify. NFC.

2 years agoback.pysim: extract timeline handling to class _Timeline. NFC.
whitequark [Wed, 8 Jul 2020 06:04:50 +0000 (06:04 +0000)]
back.pysim: extract timeline handling to class _Timeline. NFC.

2 years agoback.pysim: extract simulator commands to sim._cmds. NFC.
whitequark [Wed, 8 Jul 2020 05:42:33 +0000 (05:42 +0000)]
back.pysim: extract simulator commands to sim._cmds. NFC.

2 years agoback.pysim: simplify. NFC.
whitequark [Wed, 8 Jul 2020 03:55:09 +0000 (03:55 +0000)]
back.pysim: simplify. NFC.

2 years agohdl.ast: don't inherit Shape from NamedTuple.
awygle [Tue, 7 Jul 2020 05:17:03 +0000 (22:17 -0700)]
hdl.ast: don't inherit Shape from NamedTuple.

Fixes #421.

2 years agoback.pysim: simplify.
whitequark [Tue, 7 Jul 2020 04:29:13 +0000 (04:29 +0000)]
back.pysim: simplify.

Compiled process names were never particularly useful (comments in
the source would make more sense for debugging), and coroutine
process names were actually source locations.

2 years agoback.pysim: simplify. NFC.
whitequark [Tue, 7 Jul 2020 04:19:05 +0000 (04:19 +0000)]
back.pysim: simplify. NFC.

2 years agoback.pysim: simplify. NFC.
whitequark [Tue, 7 Jul 2020 04:09:10 +0000 (04:09 +0000)]
back.pysim: simplify. NFC.

2 years agoback.pysim: synchronize waveform writing with cxxrtl.
whitequark [Tue, 7 Jul 2020 04:06:06 +0000 (04:06 +0000)]
back.pysim: synchronize waveform writing with cxxrtl.

2 years agoback.pysim: synchronize terms with cxxrtl. NFC.
whitequark [Tue, 7 Jul 2020 02:35:04 +0000 (02:35 +0000)]
back.pysim: synchronize terms with cxxrtl. NFC.

2 years agoback.pysim: simplify. NFC.
whitequark [Tue, 7 Jul 2020 02:14:06 +0000 (02:14 +0000)]
back.pysim: simplify. NFC.

2 years agoback.pysim: simplify. NFC.
whitequark [Tue, 7 Jul 2020 01:59:25 +0000 (01:59 +0000)]
back.pysim: simplify. NFC.

2 years agoRemove everything deprecated in nmigen 0.2.
whitequark [Mon, 6 Jul 2020 16:01:49 +0000 (16:01 +0000)]
Remove everything deprecated in nmigen 0.2.

2 years agoUpdate license and copyright info
Alan Green [Wed, 1 Jul 2020 21:29:30 +0000 (17:29 -0400)]
Update license and copyright info

Remove non-license explanatory text from LICENSE.txt.

Create CONTRIBUTING file with instructions and notes for contributors.

This change relates to issue #412

2 years agovendor.lattice_ecp5: Add support for io with xdr=7
Konrad Beckmann [Mon, 6 Jul 2020 14:04:24 +0000 (16:04 +0200)]
vendor.lattice_ecp5: Add support for io with xdr=7

This adds support for IOs with xdr=7 using the
IODDR71B and ODDR71B primitives.

2 years agovendor.lattice_ecp5: Add support for io with xdr=4
Konrad Beckmann [Mon, 6 Jul 2020 14:01:19 +0000 (16:01 +0200)]
vendor.lattice_ecp5: Add support for io with xdr=4

This adds support for IOs with xdr=4 using the
IDDRX2F and ODDRX2F primitives.

2 years agodocs: use working sphinxcontrib-platformpicker.
whitequark [Sun, 5 Jul 2020 23:51:14 +0000 (23:51 +0000)]
docs: use working sphinxcontrib-platformpicker.

2 years agodocs: use sphinxcontrib-platformpicker.
whitequark [Sun, 5 Jul 2020 23:39:47 +0000 (23:39 +0000)]
docs: use sphinxcontrib-platformpicker.

Fixes #416.

2 years agodocs: link to community tutorials until we have an official one.
whitequark [Sat, 4 Jul 2020 02:09:35 +0000 (02:09 +0000)]
docs: link to community tutorials until we have an official one.

2 years agodocs/lang: document constshifts.
whitequark [Thu, 2 Jul 2020 23:11:35 +0000 (23:11 +0000)]
docs/lang: document constshifts.

2 years agodocs/index: rename to "Language & toolchain".
whitequark [Thu, 2 Jul 2020 23:08:10 +0000 (23:08 +0000)]
docs/index: rename to "Language & toolchain".

2 years agotest: remove FHDLTestCase.assertRaisesRegex.
whitequark [Thu, 2 Jul 2020 22:49:04 +0000 (22:49 +0000)]
test: remove FHDLTestCase.assertRaisesRegex.

This method is only there because I misunderstood the documentation
of unittest.

2 years agocompat.fhdl.specials: fix handling of tristate (i=None) pins.
whitequark [Thu, 2 Jul 2020 22:22:44 +0000 (22:22 +0000)]
compat.fhdl.specials: fix handling of tristate (i=None) pins.

Fixes #406.

2 years ago_yosys→_toolchain.yosys
whitequark [Thu, 2 Jul 2020 18:26:08 +0000 (18:26 +0000)]
_yosys→_toolchain.yosys

2 years agovendor: `yosys` is not a required tool for proprietary toolchains.
whitequark [Thu, 2 Jul 2020 18:13:54 +0000 (18:13 +0000)]
vendor: `yosys` is not a required tool for proprietary toolchains.

Since commit b9799b4c, the discovery mechanism for the Yosys required
to produce Verilog is different from the usual require_tool(); namely
it is possible to produce Verilog without a `yosys` binary on PATH.

Fixes #419.

2 years agoadd wheel as setup dependency
Luke Kenneth Casson Leighton [Fri, 31 Dec 2021 14:40:50 +0000 (14:40 +0000)]
add wheel as setup dependency

2 years agodocs/install: use pip/pip3 more consistently.
whitequark [Wed, 1 Jul 2020 08:58:36 +0000 (08:58 +0000)]
docs/install: use pip/pip3 more consistently.

2 years agodocs: clarify naming.
whitequark [Wed, 1 Jul 2020 08:53:52 +0000 (08:53 +0000)]
docs: clarify naming.

2 years agore-add setutools and setuptools_scm
Luke Kenneth Casson Leighton [Fri, 31 Dec 2021 14:34:49 +0000 (14:34 +0000)]
re-add setutools and setuptools_scm

2 years agoRevert "Add PEP 518 `pyproject.toml`."
whitequark [Wed, 1 Jul 2020 08:16:28 +0000 (08:16 +0000)]
Revert "Add PEP 518 `pyproject.toml`."

This reverts commit 7fca037f9c14974f499195171bb84c38ebddc1e1.

This broke editable installs and has to be reverted due to a number
of pip issues:
  * pypa/pip#6375
  * pypa/pip#6434
  * pypa/pip#6438

We can put this back once PEP 517/518 support editable installs.
Until then the legacy behavior will suffice, and we should just teach
people to install the dependencies in virtualenvs or something...

2 years agodocs: add a crude approximation of intersphinx toctrees.
whitequark [Wed, 1 Jul 2020 08:03:57 +0000 (08:03 +0000)]
docs: add a crude approximation of intersphinx toctrees.

This is a pretty awful hack. We could do this properly after one of
the following issues is fixed:
  * sphinx-doc/sphinx#701
  * sphinx-doc/sphinx#1836

2 years agoGracefully handle missing dependencies.
whitequark [Wed, 1 Jul 2020 07:00:02 +0000 (07:00 +0000)]
Gracefully handle missing dependencies.

Some people's workflows involve not using `pip`. This is not
a recommended way to use nMigen, but is prevalent enough for good
enough reason that we try to keep them working anyway.

2 years agodocs/install: fix dead link.
whitequark [Wed, 1 Jul 2020 06:33:03 +0000 (06:33 +0000)]
docs/install: fix dead link.

2 years agodocs/install: quote special chars to avoid issues with extended glob.
whitequark [Wed, 1 Jul 2020 06:32:15 +0000 (06:32 +0000)]
docs/install: quote special chars to avoid issues with extended glob.

2 years agodocs/install: explain how to install non-editable snapshot from git.
whitequark [Wed, 1 Jul 2020 06:15:16 +0000 (06:15 +0000)]
docs/install: explain how to install non-editable snapshot from git.

2 years agomanually remove setuptools and setuptools_scm, moved
Luke Kenneth Casson Leighton [Fri, 31 Dec 2021 14:31:28 +0000 (14:31 +0000)]
manually remove setuptools and setuptools_scm, moved
to pyproject.toml

2 years agoAdd PEP 518 `pyproject.toml`.
whitequark [Wed, 1 Jul 2020 05:58:05 +0000 (05:58 +0000)]
Add PEP 518 `pyproject.toml`.

This is necessary to be able to install nMigen into a virtualenv that
does not have `wheel` installed in certain cases.

See #349.

2 years agodocs/install: use `pip install --user` on *nix.
whitequark [Wed, 1 Jul 2020 05:06:20 +0000 (05:06 +0000)]
docs/install: use `pip install --user` on *nix.

2 years agodocs/install: reduce repetition.
whitequark [Wed, 1 Jul 2020 04:11:51 +0000 (04:11 +0000)]
docs/install: reduce repetition.

2 years agodocs: reword slightly.
whitequark [Wed, 1 Jul 2020 03:59:16 +0000 (03:59 +0000)]
docs: reword slightly.

2 years agodocs: explain how to install GTKWave on Windows.
whitequark [Wed, 1 Jul 2020 03:46:59 +0000 (03:46 +0000)]
docs: explain how to install GTKWave on Windows.

2 years agoCI: build docs on all pushes, update only on master.
whitequark [Wed, 1 Jul 2020 03:37:29 +0000 (03:37 +0000)]
CI: build docs on all pushes, update only on 

2 years agodocs: rewrite install instructions to be easier to understand.
whitequark [Wed, 1 Jul 2020 03:32:17 +0000 (03:32 +0000)]
docs: rewrite install instructions to be easier to understand.

2 years agodocs: fix syntax.
whitequark [Tue, 30 Jun 2020 22:29:43 +0000 (22:29 +0000)]
docs: fix syntax.

2 years agodocs: fix CI workflow.
whitequark [Tue, 30 Jun 2020 22:28:12 +0000 (22:28 +0000)]
docs: fix CI workflow.

2 years agodocs: explain that `pip3 install -e` should be run after pulling.
whitequark [Tue, 30 Jun 2020 22:26:54 +0000 (22:26 +0000)]
docs: explain that `pip3 install -e` should be run after pulling.

2 years agoAdd (heavily work in progress) documentation.
whitequark [Mon, 27 Apr 2020 07:21:31 +0000 (07:21 +0000)]
Add (heavily work in progress) documentation.

To render correctly, the docs require:
 * pygments/pygments#1441

2 years agomanually add import_metadata, import_resources
Luke Kenneth Casson Leighton [Fri, 31 Dec 2021 14:16:18 +0000 (14:16 +0000)]
manually add import_metadata, import_resources

2 years agoDon't use pkg_resources.
whitequark [Tue, 30 Jun 2020 22:08:59 +0000 (22:08 +0000)]
Don't use pkg_resources.

This package is deprecated and introduces a massive amount of startup
latency. On my machine with 264 installed Python packages, it reduces
the time required to `import nmigen` from ~100ms to ~200ms.

2 years agolib.cdc: update PulseSynchronizer to follow conventions.
whitequark [Sun, 28 Jun 2020 05:17:33 +0000 (05:17 +0000)]
lib.cdc: update PulseSynchronizer to follow conventions.

Fixes #370.

2 years agoback.pysim: simplify.
whitequark [Sun, 28 Jun 2020 05:04:16 +0000 (05:04 +0000)]
back.pysim: simplify.

Remove _EvalContext, which was a level of indirection serving almost
no purpose. (The only case where it would be useful is repeatedly
resetting a simulation that, each time it is reset, would create new
signals to communicate with between coroutine processes. In that case
the signal states would not be persisted in _SimulatorState, but
would be removed with the _EvalContext that is recreated each time
the simulation is reset. But this could be solved with a weak map
instead.)

This regresses simulator startup time by 10-15% for unknown reasons
but is necessary to align pysim and future cxxsim.

2 years ago_yosys: handle unparseable versions
Alan Green [Tue, 23 Jun 2020 12:12:02 +0000 (22:12 +1000)]
_yosys: handle unparseable versions

Do not use yosys binaries with unparseable version numbers. This ensures
that nmigen always knows what version of yosys it is generating RTLIL
for.

The effect of this change is that if the version number of the system
yosys is unparsable, nmigen will attempt to fallback to the builtin
Yosys.

Fixes #409.

2 years agovendor.lattice_machxo2: add back as a compatibility shim.
whitequark [Sun, 21 Jun 2020 17:28:01 +0000 (17:28 +0000)]
vendor.lattice_machxo2: add back as a compatibility shim.

2 years agovendor.lattice_machxo*: add MachXO3L support.
Gwenhael Goavec-Merou [Sun, 21 Jun 2020 17:24:47 +0000 (19:24 +0200)]
vendor.lattice_machxo*: add MachXO3L support.

2 years agoback.verilog: refactor Yosys script generation. NFCI.
whitequark [Sun, 14 Jun 2020 09:38:32 +0000 (09:38 +0000)]
back.verilog: refactor Yosys script generation. NFCI.

In commit 5f30bcbb, back.cxxsim gained a nicer way to generate
a script; this commit brings it to back.verilog too.

2 years agoback.cxxrtl: allow injecting black boxes.
whitequark [Sun, 14 Jun 2020 09:25:54 +0000 (09:25 +0000)]
back.cxxrtl: allow injecting black boxes.

2 years ago_yosys: add a way to retrieve Yosys data directory.
whitequark [Sun, 14 Jun 2020 00:04:18 +0000 (00:04 +0000)]
_yosys: add a way to retrieve Yosys data directory.

This is important for CXXRTL, since that's where its include files
are located.

2 years ago_yosys: fix typo in error message.
whitequark [Sun, 14 Jun 2020 00:03:36 +0000 (00:03 +0000)]
_yosys: fix typo in error message.

2 years agotest: fix example test after commit a7b8ced9.
whitequark [Thu, 11 Jun 2020 16:29:12 +0000 (16:29 +0000)]
test: fix example test after commit a7b8ced9.

2 years agoback.cxxrtl: new backend.
whitequark [Thu, 11 Jun 2020 16:19:40 +0000 (16:19 +0000)]
back.cxxrtl: new backend.

2 years ago_yosys: translate Yosys warnings to Python warnings.
whitequark [Thu, 11 Jun 2020 16:12:52 +0000 (16:12 +0000)]
_yosys: translate Yosys warnings to Python warnings.

This isn't used yet (the only Yosys warning we can get is useless),
but will be handy for CXXRTL.

2 years agofix yosys version import
Luke Kenneth Casson Leighton [Fri, 31 Dec 2021 14:07:39 +0000 (14:07 +0000)]
fix yosys version import

2 years agomanually patch in nmigen-yosys
Luke Kenneth Casson Leighton [Fri, 31 Dec 2021 14:02:09 +0000 (14:02 +0000)]
manually patch in nmigen-yosys

2 years agoback.verilog: fall back to nmigen_yosys package.
whitequark [Fri, 22 May 2020 16:50:45 +0000 (16:50 +0000)]
back.verilog: fall back to nmigen_yosys package.

The nmigen-yosys PyPI package provides a custom, minimal build of
Yosys that uses (at the moment) wasmtime-py to deliver a single
WASM binary that can run on many platforms, and eliminates the need
to build Yosys from source.

Not only does this lower barrier to entry for new nMigen developers,
but also decouples nMigen from Yosys' yearly release cycle, which
lets us use new features and drop workarounds for Yosys bugs earlier.

The source for the nmigen-yosys package is provided at:
  https://github.com/nmigen/nmigen-yosys
The package is built from upstream source and released automatically
with no manual steps.

Fixes #371.

2 years agonmigen.cli: fix file type autodetection code.
whitequark [Thu, 11 Jun 2020 15:36:43 +0000 (15:36 +0000)]
nmigen.cli: fix file type autodetection code.

2 years agoback.verilog: remove unused imports. NFC.
whitequark [Thu, 11 Jun 2020 15:17:49 +0000 (15:17 +0000)]
back.verilog: remove unused imports. NFC.

2 years agohdl.xfrm: preserve allow_reset_less when transforming ResetSignal.
Adam Greig [Sat, 6 Jun 2020 11:43:25 +0000 (12:43 +0100)]
hdl.xfrm: preserve allow_reset_less when transforming ResetSignal.

Fixes #400.

2 years agohdl.rec: preserve shapes when constructing a layout.
Shawn Anastasio [Fri, 5 Jun 2020 03:19:46 +0000 (22:19 -0500)]
hdl.rec: preserve shapes when constructing a layout.

Preserve the original user-provided shape, while still checking
its validity. This allows Enum decoders to work when specifying
record fields with Enums.

Fixes #393.

2 years agosetup: exclude tests.
whitequark [Fri, 29 May 2020 17:45:09 +0000 (17:45 +0000)]
setup: exclude tests.

The inclusion of tests in the package was completely unintentional
and a result of my lack of knowledge of setuptools. If you are using
nmigen.test.utils, please copy the parts you need to your own code
because the nmigen.test code can and will change without notice.

2 years agovendor.lattice_ice40: reword confusing comment. NFC.
whitequark [Fri, 29 May 2020 17:45:09 +0000 (17:45 +0000)]
vendor.lattice_ice40: reword confusing comment. NFC.

2 years agohdl.ast: fix typo
Robin Ole Heinemann [Sun, 24 May 2020 15:54:17 +0000 (17:54 +0200)]
hdl.ast: fix typo

2 years agoUpdate .gitignore.
whitequark [Thu, 21 May 2020 10:41:23 +0000 (10:41 +0000)]
Update .gitignore.

2 years agovendor.intel: don't use `write_verilog -decimal`.
whitequark [Thu, 21 May 2020 09:49:42 +0000 (09:49 +0000)]
vendor.intel: don't use `write_verilog -decimal`.

See commit 702e41ba for details.

2 years agovendor.intel: double-quote Tcl values rather than brace-quoting.
whitequark [Thu, 21 May 2020 09:48:42 +0000 (09:48 +0000)]
vendor.intel: double-quote Tcl values rather than brace-quoting.

For unknown reasons, Quartus treats {foo} and "foo" in completely
different ways, which is not true for normal Tcl code; specifically,
it preserves the braces if they are used. Because of this, since
commit 6cee2804, the vendor.intel package was completely broken.

2 years agovendor.xilinx_{7series,ultrascale}: don't use `write_verilog -decimal`.
whitequark [Thu, 21 May 2020 08:57:30 +0000 (08:57 +0000)]
vendor.xilinx_{7series,ultrascale}: don't use `write_verilog -decimal`.

In commit 892cff05, `-decimal` was used when writing Verilog for
Vivado targets because it treats (* keep=32'd1 *) and (* keep=1 *)
differently in violation of Verilog LRM. However, it is possible
to avoid that workaround by using (* keep="TRUE" *). Do that,
and remove `-decimal` to avoid special-casing 32-bit constants.

Refs #373.

2 years agobuild.plat: skip clock constraints on unused signals.
whitequark [Wed, 20 May 2020 05:35:47 +0000 (05:35 +0000)]
build.plat: skip clock constraints on unused signals.

It's not very nice to add more internal mutable state to Platform
related classes, but our whole approach for Platform is inherently
stateful, and other solutions (like changing every individual vendor
platform to check for unused signals) are even worse.

Fixes #374.

2 years agovendor.xilinx_{7series,ultrascale}: add (*keep*) on constrained clocks.
whitequark [Wed, 20 May 2020 04:58:03 +0000 (04:58 +0000)]
vendor.xilinx_{7series,ultrascale}: add (*keep*) on constrained clocks.

If the clock signal is not a top-level port and has aliases, it can
be optimized out, and then the constraint will no longer apply.
To prevent this, make sure the constrained signal is preferred over
any aliases by using the `keep` attribute.

Vivado does not parse attributes like (* keep = 32'd1 *) as valid
even though, AFAICT, they are equivalent to (* keep = 1 *) or simply
(* keep *) per IEEE 1364. To work around this, use the solution we
currently use for Quartus, which is `write_verilog -decimal`.

Fixes #373.

2 years agohdl.ast: add const-shift operations.
whitequark [Wed, 20 May 2020 03:18:33 +0000 (03:18 +0000)]
hdl.ast: add const-shift operations.

Also, clean up the rotate code a bit.

Fixes #378.

2 years agohdl.ast: clarify docs for Value.rotate_{left,right}.
whitequark [Tue, 19 May 2020 23:43:25 +0000 (23:43 +0000)]
hdl.ast: clarify docs for Value.rotate_{left,right}.

"Rotate modulo 2**len(self)" is redundant because that's just how
rotates work.

2 years agohdl.dsl: check for unique domain name.
whitequark [Tue, 19 May 2020 23:40:49 +0000 (23:40 +0000)]
hdl.dsl: check for unique domain name.

Fixes #385.

2 years agoback.rtlil: handle signed and large Instance parameters correctly.
whitequark [Tue, 19 May 2020 23:33:14 +0000 (23:33 +0000)]
back.rtlil: handle signed and large Instance parameters correctly.

Fixes #388.

2 years agotracer: fix get_var_name() to work on toplevel attributes.
whitequark [Mon, 4 May 2020 05:51:08 +0000 (05:51 +0000)]
tracer: fix get_var_name() to work on toplevel attributes.

E.g. this now works:

    >>> class dummy: pass
    >>> self = dummy()
    >>> self.foo = Signal()
    >>> self.foo.name
    'foo'

2 years agovendor.lattice_machxo2: generate binary bitstreams.
Gwenhael Goavec-Merou [Fri, 8 May 2020 04:42:21 +0000 (06:42 +0200)]
vendor.lattice_machxo2: generate binary bitstreams.

2 years agoplat, vendor: systematically escape net and file names in Tcl.
whitequark [Sat, 2 May 2020 10:41:18 +0000 (10:41 +0000)]
plat, vendor: systematically escape net and file names in Tcl.

Before this commit, there was only occasional quoting of some names
used in any Tcl files. (I'm not sure what I was thinking.)

After this commit, any substs that may include Tcl special characters
are escaped. This does not include build names (which are explicitly
restricted to ASCII to avoid this problem), or attribute names (which
are chosen from a predefined set). Ideally we'd use a more principled
approach but Jinja2 does not support custom escaping mechanisms.

Note that Vivado restricts clock names to a more restrictive set that
forbids using Tcl special characters even when escaped.

Fixes #375.

2 years agoback.rtlil: fix incorrect escaping of signed parameters.
whitequark [Tue, 28 Apr 2020 02:16:12 +0000 (02:16 +0000)]
back.rtlil: fix incorrect escaping of signed parameters.

Also, improve escaping code in general.

2 years agohdl.ast: use SignalSet, not ValueSet, for _[lr]hs_signals().
whitequark [Mon, 27 Apr 2020 18:06:12 +0000 (18:06 +0000)]
hdl.ast: use SignalSet, not ValueSet, for _[lr]hs_signals().

The implementation of these functions likely predates support for
{Clock,Reset}Signal() in SignalKey.

2 years agolib.fifo: add r_rst output for AsyncFIFO{,Buffered}.
awygle [Fri, 24 Apr 2020 22:27:04 +0000 (15:27 -0700)]
lib.fifo: add r_rst output for AsyncFIFO{,Buffered}.

Fixes #181.

2 years agohdl.ir: typecheck `convert(ports=)` more carefully.
awygle [Fri, 24 Apr 2020 21:15:00 +0000 (14:15 -0700)]
hdl.ir: typecheck `convert(ports=)` more carefully.

The `ports` argument to the `convert` functions is a frequent hotspot of
beginner issues. Check to make sure it is either a list or a tuple, and
give an appropriately helpful error message if not.

Fixes #362.

2 years agoREADME: link directly to Yosys build instructions.
whitequark [Fri, 24 Apr 2020 21:09:58 +0000 (21:09 +0000)]
README: link directly to Yosys build instructions.

2 years agoback.verilog: add workaround for evaluation Verific behavior.
Teguh Hofstee [Thu, 23 Apr 2020 21:46:10 +0000 (14:46 -0700)]
back.verilog: add workaround for evaluation Verific behavior.

The evaluation version of Verific prints its license information to stdout,
and since it is against the EULA to change that in any way, this behavior
is not possible to fix in Yosys. Add a workaround in nMigen instead.

2 years agoback.verilog: make Yosys version check compatible with Verific.
Teguh Hofstee [Wed, 22 Apr 2020 12:23:14 +0000 (05:23 -0700)]
back.verilog: make Yosys version check compatible with Verific.

2 years agovendor: use nextpnr -12k for -12F devices; remove theoretical devices
Kate Temkin [Mon, 20 Apr 2020 22:25:50 +0000 (16:25 -0600)]
vendor: use nextpnr -12k for -12F devices; remove theoretical devices

nextpnr now supports -12k; which replaces the use of -25k and --idcode
together to build bitstreams compatible with -12F devices. Use this.

This also removes the LFEUM-12K and its 5G counterpart; as per Dave Shah
they're currently only theoretical FPGAs.

2 years agohdl.rec: make Record inherit from UserValue.
anuejn [Thu, 16 Apr 2020 16:46:55 +0000 (18:46 +0200)]
hdl.rec: make Record inherit from UserValue.

Closes #354.

2 years agoback.rtlil: translate enum decoders to Yosys enum attributes.
whitequark [Wed, 15 Apr 2020 14:42:46 +0000 (14:42 +0000)]
back.rtlil: translate enum decoders to Yosys enum attributes.

Fixes #254.

2 years agobuil.plat: enable strict undefined behavior in Jinja2.
whitequark [Tue, 14 Apr 2020 06:17:16 +0000 (06:17 +0000)]
buil.plat: enable strict undefined behavior in Jinja2.

By default, if an operation produces an undefined value (a Jinja2
concept that corresponds to Python's KeyError, AttributeError, etc)
then this value may be printed in a template, which is a nop. This
behavior can hide bugs.

This commit changes the Jinja2 behavior to raise an error instead of
producing an undefined value in all cases. (We produce undefined
values deliberately in a few places. Those are unaffected; it is OK
to use several kinds of undefined values in one Jinja2 environment.)

Fixes #337.

2 years agoback.rtlil: don't emit connections to zero width ports.
whitequark [Mon, 13 Apr 2020 17:04:13 +0000 (17:04 +0000)]
back.rtlil: don't emit connections to zero width ports.

Fixes #335.

2 years agoback.rtlil: refuse to create extremely large wires.
whitequark [Mon, 13 Apr 2020 16:38:36 +0000 (16:38 +0000)]
back.rtlil: refuse to create extremely large wires.

Such wires are likely to trigger pathological behavior in Yosys and,
if applicable, other toolchains that consume Verilog converted from
RTLIL.

Fixes #341.

2 years agoback.rtlil: fix expansion of Part() for partial dummy writes.
whitequark [Mon, 13 Apr 2020 15:56:39 +0000 (15:56 +0000)]
back.rtlil: fix expansion of Part() for partial dummy writes.

Before this commit, selecting a part that was fully out of bounds of
a value was correctly implemented as a write to a dummy wire, but
selecting a part that was only partially out of bounds resulted in
a crash.

Fixes #351.

2 years agoback.rtlil: fix legalization of Part() with stride.
whitequark [Mon, 13 Apr 2020 14:43:43 +0000 (14:43 +0000)]
back.rtlil: fix legalization of Part() with stride.

Also known as word_select().