| Commit message (Collapse) | Author | Age | Files | Lines |
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verilog: significant block scoping improvements
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This change set contains a number of bug fixes and improvements related to
scoping and resolution in generate and procedural blocks. While many of the
frontend changes are interdependent, it may be possible bring the techmap
changes in under a separate PR.
Declarations within unnamed generate blocks previously encountered issues
because the data declarations were left un-prefixed, breaking proper scoping.
The LRM outlines behavior for generating names for unnamed generate blocks. The
original goal was to add this implicit labelling, but doing so exposed a number
of issues downstream. Additional testing highlighted other closely related scope
resolution issues, which have been fixed. This change also adds support for
block item declarations within unnamed blocks in SystemVerilog mode.
1. Unlabled generate blocks are now implicitly named according to the LRM in
`label_genblks`, which is invoked at the beginning of module elaboration
2. The Verilog parser no longer wraps explicitly named generate blocks in a
synthetic unnamed generate block to avoid creating extra hierarchy levels
where they should not exist
3. The techmap phase now allows special control identifiers to be used outside
of the topmost scope, which is necessary because such wires and cells often
appear in unlabeled generate blocks, which now prefix the declarations within
4. Some techlibs required modifications because they relied on the previous
invalid scope resolution behavior
5. `expand_genblock` has been simplified, now only expanding the outermost
scope, completely deferring the inspection and elaboration of nested scopes;
names are now resolved by looking in the innermost scope and stepping outward
6. Loop variables now always become localparams during unrolling, allowing them
to be resolved and shadowed like any other identifier
7. Identifiers in synthetic function call scopes are now prefixed and resolved
in largely the same manner as other blocks
before: `$func$\func_01$tests/simple/scopes.blk.v:60$5$\blk\x`
after: `\func_01$func$tests/simple/scopes.v:60$5.blk.x`
8. Support identifiers referencing a local generate scope nested more
than 1 level deep, i.e. `B.C.x` while within generate scope `A`, or using a
prefix of a current or parent scope, i.e. `B.C.D.x` while in `A.B`, `A.B.C`,
or `A.B.C.D`
9. Variables can now be declared within unnamed blocks in SystemVerilog mode
Addresses the following issues: 656, 2423, 2493
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Fix begin/end in generate
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The first child of AST_CASE is the case expression, it's subsequent
childrean that are AST_COND* and can be used to discriminate the type of
the case.
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flatten: clarify confusing error message
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verilog: strip leading and trailing spaces in macro args
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scc: Add -specify option to find loops in boxes
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The presence of IS_*_INVERTED on FD* cells follows Vivado, which
apparently has been decided by a dice roll. Just assume false if the
parameter doesn't exist.
Fixes #2559.
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cxxrtl: do not use `->template` for non-dependent names
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This breaks build on MSVC but not GCC/Clang.
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CXXRTL: Fix sliced bits as clock inputs
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adding support for passing multiple liberty files to abc
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verilog: allow spaces in macro arguments
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dpi: Support for chandle type
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Signed-off-by: David Shah <dave@ds0.me>
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Allow combination of rand and const modifiers
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Switch verific bindings from Symbiotic EDA flavored Verific to YosysHQ flavored Verific
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flavored Verific
Signed-off-by: Claire Xenia Wolf <claire@clairexen.net>
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Fixed missing goto statement in passes/techmap/abc.cc
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sv: fix support wire and var data type modifiers
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Add plugin.so.dSYM to .gitignore
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This artifact is automatically generated by the builtin clang on macOS
when -g is used.
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Add support for user types in IOs
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Signed-off-by: Kamil Rakoczy <krakoczy@antmicro.com>
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Signed-off-by: Kamil Rakoczy <krakoczy@antmicro.com>
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Signed-off-by: Lukasz Dalek <ldalek@antmicro.com>
Signed-off-by: Kamil Rakoczy <krakoczy@antmicro.com>
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