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2138 Commits

Author SHA1 Message Date
Jannis Harder 7203ba7bc1 Add bitwise `$bweqx` and `$bwmux` cells 
The new bitwise case equality (`$bweqx`) and bitwise mux (`$bwmux`)
cells enable compact encoding and decoding of 3-valued logic signals
using multiple 2-valued signals.
 2022-11-30 18:24:35 +01:00
Jannis Harder 99163fb822 simlib: Use optional SIMLIB_GLOBAL_CLOCK to define a global clock signal 2022-11-30 18:24:35 +01:00
Jannis Harder 605d127517 simlib: Silence iverilog warning for `$lut` 
iverilog complains about implicitly truncating LUT when connecting it to
the `$bmux` A input. This explicitly truncates it to avoid that warning
without changing the behaviour otherwise.
 2022-11-30 18:24:35 +01:00
Jannis Harder 39ac113402 simlib: Fix wide $bmux and avoid iverilog warnings 2022-11-30 18:24:35 +01:00
Jannis Harder b982ab4f59 satgen, simlib: Consistent x-propagation for `$pmux` cells 
This updates satgen and simlib to use a `$pmux` model where the output
is fully X when the S input is not all zero or one-hot with no x bits.
 2022-11-30 18:24:35 +01:00
gatecat b6467f0801 fabulous: Allow adding extra custom prims and map rules 
Signed-off-by: gatecat <gatecat@ds0.me>
 2022-11-17 13:34:58 +01:00
gatecat f111bbdf40 fabulous: improvements to the pass 
Signed-off-by: gatecat <gatecat@ds0.me>
 2022-11-17 13:34:58 +01:00
gatecat e3f9ff2679 fabulous: Unify and update primitives 
Signed-off-by: gatecat <gatecat@ds0.me>
 2022-11-17 13:34:58 +01:00
TaoBi22 12c22045b7 Introduce RegFile mappings 2022-11-17 13:34:58 +01:00
TaoBi22 2b07e01ea4 Replace synth call with components, reintroduce flags and correct vpr flag implementation 2022-11-17 13:34:58 +01:00
TaoBi22 df56178567 Reorder operations to load in primitive library before hierarchy pass 2022-11-17 13:34:58 +01:00
TaoBi22 da32f21b59 Add plib flag to specify custom primitive library path 2022-11-17 13:34:58 +01:00
TaoBi22 950dde3081 Remove flattening from FABulous pass 2022-11-17 13:34:58 +01:00
TaoBi22 8fdf4948a8 Remove ALL currently unused flags (some to be reintroduced later and passed through to synth) 2022-11-17 13:34:58 +01:00
TaoBi22 2e9480be24 Add synth_fabulous ScriptPass 2022-11-17 13:34:58 +01:00
Jannis Harder aa7e7df19f simlib: Simplify recently changed $mux model 
The use of a procedural continuous assignment introduced in #3526 was
unintended and is completely unnecessary for the actual change of that
PR.
 2022-10-28 19:48:00 +02:00
Jannis Harder 408fc60c95
Merge pull request #3526 from jix/mux-simlib-eval 
Consistent $mux undef handling
 2022-10-24 16:25:33 +02:00
Jannis Harder c77b7343d0 Consistent $mux undef handling 
* Change simlib's $mux cell to use the ternary operator as $_MUX_
  already does
* Stop opt_expr -keepdc from changing S=x to S=0
* Change const eval of $mux and $pmux to match the updated simlib
  (fixes sim)
* The sat behavior of $mux already matches the updated simlib

The verilog frontend uses $mux for the ternary operators and this
changes all interpreations of the $mux cell (that I found) to match the
verilog simulation behavior for the ternary operator. For 'if' and
'case' expressions the frontend may also use $mux but uses $eqx if the
verilog simulation behavior is requested with the '-ifx' option.

For $pmux there is a remaining mismatch between the sat behavior and the
simlib behavior. Resolving this requires more discussion, as the $pmux
cell does not directly correspond to a specific verilog construct.
 2022-10-24 12:03:01 +02:00
Jannis Harder 0f96ae5990 Add smtmap.v describing the smt2 backend's behavior for undef bits 
Some builtin cells have an undefined (x) output even when all inputs are
defined. This is not natively supported by the formal backends which
will produce a fully defined value instead. This can lead to issues when
combining different backends in a formal flow. To work around these,
this adds a file containing verilog implementation of cells matching the
fully defined behavior implemented by the smt2 backend.
 2022-10-20 15:48:18 +02:00
Miodrag Milanovic 1ecf6aee9b Test fixes for latest iverilog 2022-09-21 15:46:43 +02:00
Tristan Gingold 1e0e3bd48e sf2: add NOTES about using yosys for smartfusion2 and igloo2 2022-08-31 08:40:44 +02:00
Tristan Gingold 0f6cf8b8e4 sf2: add a test for $alu gate 2022-08-31 08:40:44 +02:00
Tristan Gingold c25f3ff3df sf2: suport $alu gate and ARI1 implementation 2022-08-31 08:40:44 +02:00
Tristan Gingold 13ccdd032d synth_sf2: purge on last clean 
LiberoSoc don't like unused nets.
 2022-08-31 08:40:44 +02:00
Tristan Gingold 39993a92d7 sf2/cells_sim.v: add XTLOSC, SYSRESET cells 2022-08-31 08:40:44 +02:00
Tristan Gingold 1c0119aa90 sf2/cells_sim.v: add IOSTD parameter to I/O cells 
This parameter is set by LiberoSoc IPs, so it is needed to avoid
errors when using those IPs.
 2022-08-31 08:40:43 +02:00
Tristan Gingold 4543751a77 synth_sf2: add -discard-ffinit option to discard ff initial value 
sf2 ff have no initial values, but some IP cores use initial values.
In order to use those cores on sf2, it is required to discard the
initial value (to be carefully used).
 2022-08-31 08:40:43 +02:00
KrystalDelusion 9465b2af95 Fitting help messages to 80 character width 
Uses the regex below to search (using vscode):
	^\t\tlog\("(.{10,}(?<!\\n)|.{81,}\\n)"\);

Finds any log messages double indented (which help messages are)
and checks if *either* there are is no newline character at the end,
*or* the number of characters before the newline is more than 80.
 2022-08-24 10:40:57 +12:00
Jannis Harder c0063288d6 Add the $anyinit cell and the formalff pass 
These can be used to protect undefined flip-flop initialization values
from optimizations that are not sound for formal verification and can
help mapping all solver-provided values in witness traces for flows that
use different backends simultaneously.
 2022-08-16 13:37:30 +02:00
Sean Anderson 8c05f14b58 Order ports with default assignments first 
Although the current style is allowed by the standard, Icarus verilog
doesn't parse default assignments using an implicit net type:

	techlibs/ice40/cells_sim.v:305: syntax error
	techlibs/ice40/cells_sim.v:1: Errors in port declarations.

Fix this by making sure that ports with default assignments first on
their line.

Fixes: 46d3f03d2 ("Add default assignments to other SB_* simulation models")
Signed-off-by: Sean Anderson <seanga2@gmail.com>
 2022-08-09 23:42:24 -04:00
Marcelina Kościelnicka 8fab6ec023 nexus: Fix BRAM mapping. 2022-08-09 23:47:55 +02:00
Miodrag Milanović 86a4ba1758
Merge pull request #3397 from pepijndevos/patch-2 
Apicula now supports lutram
 2022-07-06 09:50:52 +02:00
Miodrag Milanovic 4db820e9d4 Fix static initialization, fixes mingw build 2022-07-04 19:31:38 +02:00
Pepijn de Vos de07eb11c1
Apicula now supports lutram 2022-07-03 12:45:03 +02:00
gatecat 38a24ec5cc gatemate: Add LUT tree library script 
Co-authored-by: Claire Xenia Wolf <claire@clairexen.net>
Signed-off-by: gatecat <gatecat@ds0.me>
 2022-06-27 10:09:48 +01:00
gatecat 7c756c9959 gatemate: Add preliminary sim models for LUT tree structures 
Signed-off-by: gatecat <gatecat@ds0.me>
 2022-06-27 10:09:48 +01:00
Marcelina Kościelnicka 71dfbf33b2 Add -no-rw-check option to memory_dff + memory + synth_{ice40,ecp5,gowin}. 2022-06-02 23:16:12 +02:00
Patrick Urban 5d08688054
gatemate: Fix minor issues with `memory_libmap` (#3343) 2022-05-27 23:35:26 +02:00
Marcelina Kościelnicka 2a2dc12eb6 gatemate: Use `memory_libmap` pass. 2022-05-18 17:32:56 +02:00
Marcelina Kościelnicka 2dcb0797f0 machxo2: Use `memory_libmap` pass. 2022-05-18 17:32:56 +02:00
Marcelina Kościelnicka 9d11575856 efinix: Use `memory_libmap` pass. 2022-05-18 17:32:56 +02:00
Marcelina Kościelnicka f4d1426229 anlogic: Use `memory_libmap` pass. 2022-05-18 17:32:56 +02:00
Marcelina Kościelnicka d7dc2313b9 ice40: Use `memory_libmap` pass. 2022-05-18 17:32:56 +02:00
Marcelina Kościelnicka 3b2f95953c xilinx: Use `memory_libmap` pass. 2022-05-18 17:32:56 +02:00
Marcelina Kościelnicka e4d811561c gowin: Use `memory_libmap` pass. 2022-05-18 17:32:56 +02:00
Marcelina Kościelnicka 0a8eaca322 nexus: Use `memory_libmap` pass. 2022-05-18 17:32:56 +02:00
Marcelina Kościelnicka a04b025abf ecp5: Use `memory_libmap` pass. 2022-05-18 17:32:56 +02:00
Rick Luiken 414dc25a96 Add missing parameters for ecp5 2022-04-25 15:31:41 +01:00
Tim Pambor 30bc0d26ea gowin: Add oscillator primitives 2022-03-28 13:33:24 +02:00
Marcelina Kościelnicka be9595e18f xilinx: Add RAMB4* blackboxes 2022-03-21 13:11:52 +01:00