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1632 Commits

Author SHA1 Message Date
Zachary Snow a650d9079f verilog: fix width/sign detection for functions 2022-05-30 16:45:39 -04:00
Jannis Harder 4bfaaea0d5 verilog: fix size and signedness of array querying functions 
genrtlil.cc and simplify.cc had inconsistent and slightly broken
handling of signedness for array querying functions. These functions are
defined to return a signed result. Simplify always produced an unsigned
and genrtlil always a signed 32-bit result ignoring the context.

Includes tests for the the relvant edge cases for context dependent
conversions.
 2022-05-30 09:11:31 -04:00
Jannis Harder b75fa62e9b verilog: fix $past's signedness 2022-05-25 16:32:08 -04:00
Jannis Harder cffec1f95f verilog: fix signedness when removing unreachable cases 2022-05-24 23:03:31 -04:00
Miodrag Milanovic fdb393b6ce fix text to fit 80 columns 2022-05-23 19:57:21 +02:00
Miodrag Milanovic 4a5790d404 Update verific command file documentation 2022-05-23 19:35:14 +02:00
Miodrag Milanovic a6ec5754c6 Use analysis mode if set in file 2022-05-23 19:13:45 +02:00
Jannis Harder fada77b8cf verific: Use new value change logic also for $stable of wide signals. 
I missed this in the previous PR.
 2022-05-11 13:05:27 +02:00
Jannis Harder 587e09d551
Merge pull request #3305 from jix/sva_value_change_logic 
verific: Improve logic generated for SVA value change expressions
 2022-05-09 16:40:34 +02:00
Jannis Harder a855d62b42 verific: Improve logic generated for SVA value change expressions 
The previously generated logic assumed an unconstrained past value in
the initial state and did not handle 'x values. While the current formal
verification flow uses 2-valued logic, SVA value change expressions
require a past value of 'x during the initial state to behave in the
expected way (i.e. to consider both an initial 0 and an initial 1 as
$changed and an initial 1 as $rose and an initial 0 as $fell).

This patch now generates logic that at the same time

	a) provides the expected behavior in a 2-valued logic setting, not
	   depending on any dont-care optimizations, and

	b) properly handles 'x values in yosys simulation
 2022-05-09 15:04:01 +02:00
Jannis Harder 96f64f4788 verific: Fix conditions of SVAs with explicit clocks within procedures 
For SVAs that have an explicit clock and are contained in a procedure
which conditionally executes the assertion, verific expresses this using
a mux with one input connected to constant 1 and the other output
connected to an SVA_AT. The existing code only handled the case where
the first input is connected to 1. This patch also handles the other
case.
 2022-05-03 14:13:08 +02:00
Miodrag Milanovic 422db937d4 Ignore merging past ffs that we are not properly merging 2022-04-29 14:35:02 +02:00
Miodrag Milanovic 1cc281ca6f verific: allow memories to be inferred in loops (vhdl) 2022-04-18 09:10:28 +02:00
N. Engelhardt 57bc29c64a verific: allow memories to be inferred in loops 2022-04-15 15:10:48 +02:00
Zachary Snow bf15dbd0f7 sv: fix always_comb auto nosync for nested and function blocks 2022-04-05 14:43:48 -06:00
Miodrag Milanovic 1a1f529099 Preserve internal wires for external nets 2022-04-01 12:07:15 +02:00
Miodrag Milanovic bbf65702a1 Fix valgrind tests when using verific 2022-03-30 17:25:53 +02:00
Miodrag Milanovic 703769e494 Properly mark modules imported 2022-03-26 09:43:51 +01:00
Miodrag Milanovic 245ecb0529 Import verific netlist in consistent order 2022-03-25 13:44:16 +01:00
Miodrag Milanović 13655ddccf
Merge pull request #3206 from YosysHQ/micko/quote_remove 
Remove quotes if any from attribute
 2022-03-04 16:39:01 +01:00
N. Engelhardt 8fd1b06249 fix handling of escaped chars in json backend and frontend 2022-02-18 17:13:09 +01:00
Miodrag Milanovic 29293a57bb Remove quotes if any from attribute 2022-02-16 19:10:13 +01:00
Zachary Snow 15a4e900b2 verilog: support for time scale delay values 2022-02-14 15:58:31 +01:00
Kamil Rakoczy 68c67c40ec
Fix access to whole sub-structs (#3086) 
* Add support for accessing whole struct
* Update tests

Signed-off-by: Kamil Rakoczy <krakoczy@antmicro.com>
 2022-02-14 14:34:20 +01:00
Zachary Snow 15eb66b99d verilog: fix dynamic dynamic range asgn elab 2022-02-11 22:54:55 +01:00
Zachary Snow 90bb47d181 verilog: fix const func eval with upto variables 2022-02-11 21:01:51 +01:00
Miodrag Milanović fc7d78f071
Merge pull request #3164 from zachjs/fix-ast-warn 
fix dumpAst() compilation warning
 2022-02-11 16:43:35 +01:00
Miodrag Milanovic 2cef48bf2c Add ability to override verilog mode for verific -f command 2022-02-09 09:19:25 +01:00
Miodrag Milanovic 0b633b6c2e Use bmux for NTO1MUX 2022-02-02 16:16:08 +01:00
Zachary Snow 342927732e fix dumpAst() compilation warning 2022-01-18 00:17:08 -07:00
Zachary Snow aa35f24290 sv: auto add nosync to certain always_comb local vars 
If a local variable is always assigned before it is used, then adding
nosync prevents latches from being needlessly generated.
 2022-01-07 22:53:22 -07:00
Zachary Snow 828e85068f sv: fix size cast internal expression extension 2022-01-07 21:21:02 -07:00
Zachary Snow 8c509a5659 sv: fix size cast clipping expression width 2022-01-03 08:17:35 -07:00
Zachary Snow 7608985d2c fix width detection of array querying function in case and case item expressions 
I also removed the unnecessary shadowing of `width_hint` and `sign_hint`
in the corresponding case in `simplify()`.
 2021-12-17 21:22:08 -07:00
Thomas Sailer 4cd2f03e36 preprocessor: do not destroy double slash escaped identifiers 
The preprocessor currently destroys double slash containing escaped
identifiers (for example \a//b ). This is due to next_token trying to
convert single line comments (//) into /* */ comments. This then leads
to an unintuitive error message like this:
ERROR: syntax error, unexpected '*'

This patch fixes the error by recognizing escaped identifiers and
returning them as single token. It also adds a testcase.
 2021-12-15 18:06:02 -07:00
Claire Xenia Wolf 313340aed5 Add YOSYS to the implicitly defined verilog macros in verific 
Signed-off-by: Claire Xenia Wolf <claire@clairexen.net>
 2021-12-13 18:20:08 +01:00
Miodrag Milanović 2412497c26
Merge pull request #3102 from YosysHQ/claire/enumxz 
Fix verific import of enum values with x and/or z
 2021-12-10 19:36:37 +01:00
Claire Xenia Wolf 2da214d721 Fix verific import of enum values with x and/or z 
Signed-off-by: Claire Xenia Wolf <claire@clairexen.net>
 2021-12-10 14:52:27 +01:00
Claire Xen 19773d093f
Update verific.cc 
Ad-hoc fixes/improvements
 2021-12-10 14:27:18 +01:00
Miodrag Milanovic b06f547993 If direction NONE use that from first bit 2021-12-08 11:50:10 +01:00
Miodrag Milanovic 3ebfa3fb84 Make sure cell names are unique for wide operators 2021-12-03 09:49:05 +01:00
Kamil Rakoczy fdb19a5b3a
Support parameters using struct as a wiretype (#3050) 
Signed-off-by: Kamil Rakoczy <krakoczy@antmicro.com>
 2021-11-16 10:59:54 +01:00
Miodrag Milanovic 15a35f5584 No need to alocate more memory than used 2021-11-10 10:50:44 +01:00
Kamil Rakoczy f4f5acf396 genrtlil: Fix displaying debug info in packages 
Signed-off-by: Kamil Rakoczy <krakoczy@antmicro.com>
 2021-11-10 01:31:39 +01:00
Claire Xenia Wolf 2ea757da51 Add "verific -cfg" command 
Signed-off-by: Claire Xenia Wolf <claire@clairexen.net>
 2021-11-01 10:41:51 +01:00
Claire Xenia Wolf 83118bfb9e Fix verific gclk handling for async-load FFs 
Signed-off-by: Claire Xenia Wolf <claire@clairexen.net>
 2021-10-31 17:12:29 +01:00
Miodrag Milanovic f7cc388bb5 Enable async load dff emit by default in Verific 2021-10-27 15:56:56 +02:00
Miodrag Milanovic 32673edfea Revert "Compile option for enabling async load verific support" 
This reverts commit b8624ad2ae.
 2021-10-27 15:55:43 +02:00
Zachary Snow e833c6a418 verilog: use derived module info to elaborate cell connections 
- Attempt to lookup a derived module if it potentially contains a port
  connection with elaboration ambiguities
- Mark the cell if module has not yet been derived
- This can be extended to implement automatic hierarchical port
  connections in a future change
 2021-10-25 18:25:50 -07:00
Rupert Swarbrick bd16d01c0e Split out logic for reprocessing an AstModule 
This will enable other features to use same core logic for replacing an
existing AstModule with a newly elaborated version.
 2021-10-25 18:25:50 -07:00