Commit Graph

425 Commits

Author SHA1 Message Date
whitequark d5c9953c09 ast: translate $display/$write tasks in always blocks to new $print cell. 2023-08-11 04:46:52 +02:00
whitequark 9f8e039a4b ast: use new format string helpers. 2023-08-11 04:46:52 +02:00
Zachary Snow d5d2bf815a Fix semantic merge conflict in previous two merged PRs 2023-07-21 00:08:10 -04:00
Martin Povišer 72a4022a10 ast/simplify: Retire 'at_zero' flag
Now that all the callsites pass in 'false' for the flag (or propagate
the flag on recursion), we can retire it.
2023-07-20 23:40:19 -04:00
Martin Povišer 4fceeb3b32 ast/simplify: Use clone_at_zero() for "at_zero" evaluations
The correct way of using the 'at_zero' regime of simplify is to perform
the simplification on a cloned AST subtree, otherwise the "at_zero"
evaluation seeps into the main tree.

Move the effect of the 'at_zero' flag to the cloning itself, so that
the simplify flag can be retired. We assume we can rely on id2ast in
the new clone method.
2023-07-20 23:40:19 -04:00
Martin Povišer 77d4b5230e ast: Move to a new helper method to print input errors
It's a repeating pattern to print an error message tied to an AST
node. Start using an 'input_error' helper for that. Among other
things this is beneficial in shortening the print lines, which tend
to be long.
2023-07-20 23:40:19 -04:00
Martin Povišer 1ac1b2eed5 ast/simplify: Factor out helper to determine range width 2023-07-20 23:40:19 -04:00
Dag Lem cff53d6d87 Corrected handling of nested typedefs of struct/union
This also corrects shadowing of constants in struct/union types.
2023-07-20 23:39:44 -04:00
Dag Lem ad437c178d Handling of attributes for struct / union variables
(* nowrshmsk *) on a struct / union variable now affects dynamic
bit slice assignments to members of the struct / union.

(* nowrshmsk *) can in some cases yield significant resource savings; the
combination of pipeline shifting and indexed writes is an example of this.

Constructs similar to the one below can benefit from (* nowrshmsk *), and
in addition it is no longer necessary to split out the shift assignments
on separate lines in order to avoid the error message "ERROR: incompatible
mix of lookahead and non-lookahead IDs in LHS expression."

    always_ff @(posedge clk) begin
        if (rotate) begin
            { v5, v4, v3, v2, v1, v0 } <= { v4, v3, v2, v1, v0, v5 };

            if (res) begin
                v0.bytes <= '0;
            end else if (w) begin
                v0.bytes[addr] <= data;
            end
        end
    end
2023-05-03 18:44:07 +02:00
Dag Lem 0d3423ddea Index struct/union members within corresponding wire chunks
This guards against access to bits outside of struct/union
members via dynamic indexing.
2023-03-05 14:54:17 +01:00
Dag Lem c1e12877f0 Support for data and array queries on struct/union item expressions
For now, $bits, $left, $right, $low, $high, and $size are supported.
2023-02-15 11:44:24 +01:00
Jannis Harder 53bda9de54
Merge pull request #3661 from daglem/struct-array-range-offset
Handle range offsets in packed arrays within packed structs
2023-02-15 11:21:56 +01:00
Dag Lem 615adc4253
Resolve package types in interfaces (#3658)
* Resolve package types in interfaces
* Added test for resolving of package types in interfaces
2023-02-12 18:25:39 -05:00
Dag Lem 777c589e85 Handle range offsets in packed arrays within packed structs
This brings the metadata for packed arrays in packed structs
in line with the metadata for unpacked arrays, and correctly
handles the case when both lsb and msb in an address range are
non-zero.
2023-02-05 17:09:51 +01:00
Dag Lem db13c6df2b
Handle struct members of union type (#3641) 2023-01-29 13:45:45 -05:00
Miodrag Milanovic 6574553189 Fixes for some of clang scan-build detected issues 2023-01-17 12:58:08 +01:00
Jannis Harder 3ebc50dee4
Merge pull request #3467 from jix/fix_cellarray_simplify
simplify: Do not recursively simplify AST_CELL within AST_CELLARRAY
2022-12-19 16:05:13 +01:00
Jannis Harder dd8b412833 simplify: Do not recursively simplify AST_CELL within AST_CELLARRAY
Otherwise the AST_CELL simplification uses the wrong celltype before the
AST_CELLARRAY simplification has a chance to unroll it and change it to
the $array celltype.
2022-12-07 18:21:36 +01:00
Dag Lem 22090011ab Made make_struct_member_range side-effect-free again 2022-12-04 06:54:22 +01:00
Dag Lem f94eec952f Support for packed multidimensional arrays within packed structs 2022-12-03 19:54:47 +01:00
Jannis Harder 4a2b7287ca
Merge pull request #3551 from daglem/struct-array-swapped-range
Support for arrays with swapped ranges within structs
2022-12-01 00:58:32 +01:00
Dag Lem 64f88eb7f1 Added asserts for current limitation of array dimensions in packed structs 2022-11-30 23:32:41 +01:00
Dag Lem 15c8e74329 Check for all cases of currently unsupported array dimensions in packed structs 2022-11-30 20:04:45 +01:00
Dag Lem ddb12148e7 Support for swapped ranges in second array dimension 2022-11-23 16:31:08 +01:00
Dag Lem bab88630c2 Support for arrays with swapped ranges within structs
This also corrects the implementation of C type arrays within structs.

Fixes #3550
2022-11-12 08:48:25 +01:00
Zachary Snow 71e7e09092 verilog: Support module-scoped task/function calls
This is primarily intended to enable the standard-permitted use of
module-scoped identifiers to refer to tasks and non-constant functions.
As a side-effect, this also adds support for the non-standard use of
module-scoped identifiers referring to constant functions, a feature
that is supported in some other tools, including Iverilog.
2022-10-29 15:14:11 -04:00
Miodrag Milanovic 6c65ca4e50 Encode filename unprintable chars 2022-08-08 16:13:33 +02:00
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
Zachary Snow bf15dbd0f7 sv: fix always_comb auto nosync for nested and function blocks 2022-04-05 14:43:48 -06:00
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
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 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
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
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
Zachary Snow 6b7267b849 verilog: fix multiple AST_PREFIX scope resolution issues
- Root AST_PREFIX nodes are now subject to genblk expansion to allow
  them to refer to a locally-visible generate block
- Part selects on AST_PREFIX member leafs can now refer to generate
  block items (previously would not resolve and raise an error)
- Add source location information to AST_PREFIX nodes
2021-09-21 12:10:59 -04:00
Marcelina Kościelnicka 8bdc019730 verilog: Emit $meminit_v2 cell.
Fixes #2447.
2021-07-28 23:18:38 +02:00
Zachary Snow a9c8ca21d5 sv: fix two struct access bugs
- preserve signedness of struct members
- fix initial width detection of struct members (e.g., in case expressions)
2021-07-15 11:57:20 -04:00
Zachary Snow 4446cfa524 sv: fix a few struct and enum memory leaks 2021-07-06 12:15:08 -04:00
Xiretza 62a42c317c ast: delete wires and localparams after finishing const evaluation 2021-06-14 13:56:51 -04:00
Xiretza 091295a5a5 verilog: fix leaking ASTNodes 2021-06-14 13:56:51 -04:00
Claire Xen 55e8f5061a
Merge pull request #2817 from YosysHQ/claire/fixemails
Fixing old e-mail addresses and deadnames
2021-06-09 13:22:52 +02:00
Zachary Snow 2e697f5655 verilog: check for module scope identifiers during width detection
The recent fix for case expression width detection causes the width of
the expressions to be queried before they are simplified. Because the
logic supporting module scope identifiers only existed in simplify,
looking them up would fail during width detection. This moves the logic
to a common helper used in both simplify() and detectSignWidthWorker().
2021-06-08 15:03:16 -04:00
Zachary Snow c79fbfe0a1 mem2reg: tolerate out of bounds constant accesses
This brings the mem2reg behavior in line with the nomem2reg behavior.
2021-06-08 15:02:57 -04:00
Claire Xenia Wolf 72787f52fc Fixing old e-mail addresses and deadnames
s/((Claire|Xen|Xenia|Clifford)\s+)+(Wolf|Xen)\s+<(claire|clifford)@(symbioticeda.com|clifford.at|yosyshq.com)>/Claire Xenia Wolf <claire@yosyshq.com>/gi;
s/((Nina|Nak|N\.)\s+)+Engelhardt\s+<nak@(symbioticeda.com|yosyshq.com)>/N. Engelhardt <nak@yosyshq.com>/gi;
s/((David)\s+)+Shah\s+<(dave|david)@(symbioticeda.com|yosyshq.com|ds0.me)>/David Shah <dave@ds0.me>/gi;
s/((Miodrag)\s+)+Milanovic\s+<(miodrag|micko)@(symbioticeda.com|yosyshq.com)>/Miodrag Milanovic <micko@yosyshq.com>/gi;
s,https?://www.clifford.at/yosys/,http://yosyshq.net/yosys/,g;
2021-06-08 00:39:36 +02:00
Zachary Snow 8cfed1a979 sv: support tasks and functions within packages 2021-06-01 13:17:41 -04:00
Zachary Snow 0795b3ec07 verilog: fix case expression sign and width handling
- The case expression and case item expressions are extended to the
  maximum width among them, and are only interpreted as signed if all of
  them are signed
- Add overall width and sign detection for AST_CASE
- Add sign argument to genWidthRTLIL helper
- Coverage for both const and non-const case statements
2021-05-25 16:16:46 -04:00