v0.0.12

Breaking Changes

• Removed deprecated CLI flags -d/-e/-i, which have been aliased to -D/-E/-I with a warning since late 2019

New Features

• unique, unique0, and priority case statements now produce corresponding parallel_case and full_case statement attributes
• Added support for attributes in unary, binary, and ternary expressions
• Added support for streaming concatenations within ternary expressions
• Added support for shadowing interface names with local typenames
• Added support for passing through wait statements

Bug Fixes

• Fixed signed unsized literals with a leading 1 bit (e.g., 'sb1, 'sh8f) incorrectly sign-extending in size and type casts
• Fixed conflicting genvar names when inlining interfaces and modules that use them; all genvars are now given a design-wide unique name
• Fixed unconverted structs within explicit type casts
• Fixed byte order of strings in size casts
• Fixed unconverted multidimensional struct fields within dimension queries
• Fixed non-typenames (e.g., from packages or subsequent declarations) improperly shadowing the names of struct pattern fields
• Fixed shadowing of interface array indices passed to port connections
• Fixed failure to resolve typenames suffixed with dimensions in contexts permitting both types and expressions, e.g., $bits(T[W-1:0])
• Fixed an issue that prevented parsing tasks and functions with inout ports
• Fixed errant constant folding of shadowed non-trivial localparams
• Fixed conversion of function calls with no arguments passed to other functions
• Fixed certain non-ANSI style port declarations being incorrectly reported as incompatible

Other Enhancements

• always_comb and always_latch now reliably execute at time zero
• Added error checking for unresolved typenames
• Added constant folding for || and &&
• input reg module ports are now converted to input wire
• x | |y and x & &y are now output as x | (|y) and x & (&y)

v0.0.11

New Features

• Added -y/--libdir for specifying library directories from which to automatically load modules and interfaces used in the design that are not found in the provided input files
• Added --top for pruning unneeded modules during conversion
• Added --write path/to/dir/ for creating an output .v in the specified preexisting directory for each module in the converted result
• The string data type is now dropped from parameters and localparams
• Added support for passing through sequence and property declarations

Bug Fixes

• Fixed crash when converting multi-dimensional arrays or arrays of structs or unions used in certain expressions involving unbased unsized literals
• Fixed module-level localparams being needlessly inlined when forming longest static prefixes, which could cause deep recursion and run out of memory on some designs
• Fixed overzealous removal of explicitly unconnected ports (e.g., .a())
• Fixed an issue that left always_comb, always_latch, and always_ff unconverted when tagged with an attribute
• Fixed unneeded scoping of constant function calls used in type lookups
• /*/ is no longer interpreted as a self-closing block comment, e.g., $display("a"/*/,"b"/* */); previously printed "ab", but now prints "a"
• Fixed missing begin/end when disambiguating procedural branches tagged with an attribute
• Fixed keywords included in the "1364-2001" and "1364-2001-noconfig" begin_keywords version specifiers

Other Enhancements

• Added elaboration for accesses to fields of struct constants, which can substantially improve conversion speed on some designs
• Added constant folding for comparisons involving string literals
• Port connection attributes (e.g., pulp_soc.sv) are now ignored with a warning rather than failing to parse
• Improved error message when specifying an extraneous named port connection
• Improved error message for an unfinished conditional directive, e.g., an ifdef with no endif
• Added checks for accidental usage of interface or module names as type names

v0.0.10

Breaking Changes

• --write adjacent no longer forbids overwriting existing generated files

New Features

• Added support for assignments within expressions (e.g., x = ++y;)
• Added support for excluding the conversion of unbased unsized literals (e.g., '1, 'x) via --exclude UnbasedUniszed
• Added support for enumerated type ranges (e.g., enum { X[3:5] })
• Added support for complex event expressions (e.g., @(x ^ y))
• Added support for the SystemVerilog edge event
• Added support for cycle delay ranges in assertion sequence expressions
• Added support for procedural continuous assignments (assign/deassign and force/release)
• Added conversion for do while loops
• Added support for hierarchical calls to functions with no inputs
• Added support for passing through DPI imports and exports
• Added support for passing through functions with output ports
• Extended applicability of simplified Yosys-compatible for loop elaboration

Other Enhancements

• Certain errors raised during conversion now also provide hierarchical and approximate source location information to help locate the error

Bug Fixes

• Fixed inadvertent design behavior changes caused by constant folding removing intentional width-extending operations such as + 0 and * 1
• Fixed forced conversion to reg of data sensed in an edge-controlled procedural assignment
• always_comb and always_latch now generate explicit sensitivity lists where necessary because of calls to functions which reference non-local data
• Fixed signed struct fields being converted to unsigned expressions when accessed directly
• Fixed conversion of casts using structs containing multi-dimensional fields
• Fixed incorrect name resolution conflicts raised during interface inlining
• Fixed handling of interface instances which shadow other declarations
• Fixed names like <pkg>_<name> being shadowed by elaborated packages

v0.0.9

Breaking Changes

• Unsized number literals exceeding the maximum width of 32 bits (e.g., 'h1_ffff_ffff, 4294967296) are now truncated and produce a warning, rather than being silently extended
  • Support for unsized number literals exceeding the standard-imposed 32-bit limit can be re-enabled with --oversized-numbers
• Input source files are now decoded as UTF-8 on all platforms, with transcoding failures tolerated, enabling reading files encoded using other ASCII supersets (e.g., Latin-1)

New Features

• Added support for non-ANSI style port declarations where the port declaration is separate from the corresponding net or variable declaration
• Added support for typed value parameters declared in parameter port lists without explicitly providing a leading parameter or localparam marker
• Added support for tasks and functions with implicit port directions
• Added support for parameters which use a type-of as the data type
• Added support for bare delay controls with real number delays
• Added support for deferred immediate assertions

Other Enhancements

• Explicitly-sized number literals with non-zero bits exceeding the given width (e.g., 1'b11, 3'sd8, 2'o7) are now truncated and produce a warning, rather than yielding a cryptic error
• Number literals with leading zeroes which extend beyond the width of the literal (e.g., 1'b01, 'h0_FFFF_FFFF) now produce a warning
• Non-positive integer size casts are now detected and forbidden
• Negative indices in struct pattern literals are now detected and forbidden
• Escaped vendor block comments in macro bodies are now tolerated
• Illegal bit-selects and part-selects of scalar struct fields are now detected and forbidden, rather than yielding an internal assertion failure

Bug Fixes

• Fixed parsing of sized ports with implicit directions
• Fixed flattening of arrays used in nested ternary expressions
• Fixed preprocessing of line comments which are neither preceded nor followed by whitespace except for the newline which terminates the comment
• Fixed parsing of alternate spacings of @(*)
• Fixed conversion of interface-based typedefs when used with explicit modports, unpacked arrays, or in designs with multi-dimensional instances
• Fixed conversion of module-scoped references to modports
• Fixed conversion of references to modports nested within types in expressions
• Fixed assertion removal in verbose mode causing orphaned statements

v0.0.8

Release v0.0.8

v0.0.7

Release v0.0.7

v0.0.6

Release v0.0.6

v0.0.5

Release v0.0.5

v0.0.4

prevent duplicate build of release tags

v0.0.3

Release v0.0.3