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diff --git a/NEWS.md b/NEWS.md new file mode 100644 index 000000000..9aedc6596 --- /dev/null +++ b/NEWS.md @@ -0,0 +1,440 @@ +# NEWS for ghdl (Dunoon Edition) + +**v0.34-dev** +* Display stack backtraces on errors or assert failures +* Compile scripts for vendor libraries (Xilinx, Altera, osvvm, vunit) +* Use SSE2 for mcode backend +* Mode backend ported to `x86_64` +* Support cocotb [potentialventures/cocotb](https://github.com/potentialventures/cocotb) +* Main repository is now on github: [github.com/tgingold/ghdl](https://github.com/tgingold/ghdl) +* Docs available on rtd: [ghdl.readthedocks.org](https://ghdl.readthedocs.org/en/latest/) +* Speed improved. +* New option `--psl-report`, to report status of PSL assert and cover. +* VHDL2008: support nested packages + +**v0.33** (2015-10-04) +* Improve support of VHDL2008 +* Support [OSVVM](http://osvvm.org) 2015 +* Support VUnit: [LarsAsplund/vunit](https://github.com/LarsAsplund/vunit) +* Many bugs fixed + +**v0.32** (2014-11-XX) +* Updated to build with `gcc-4.9.2`. +* support: + * partial of VHDL2008 (available with `--std=08`): + * new `std.env` package. + * added features in `std.textio` package + * all standard IEEE packages. + * new operations (relation operators, maximum and minimum, unary reduction operators) + * `boolean_vector`, `integer_vector`, `real_vector`. + * process(all). + * generic packages and interface package declarations. + * block comments (aka delimited comments) + * implicitely defined to_string functions. + * OSVVM 2014_01 +* Bugs fixed + +**v0.31** (2014-01-XX) +* Updated to build with `gcc-4.8.2`. +* Supports OSVVM (Open-Source VHDL Verification Methodology) (see [osvvm.org](http://osvvm.org)) in its VHDL-2002 form. +* Adds `'image` and `'value` attributes for all required datatypes +* Many bugs and support issues fixed. +* New home on `https://sourceforge.net/projects/ghdl-updates/` + +**v0.30** +Never released, swith to Dunoon Edition. + +**v0.29** (2010-01-09) +* Initial implementation of embedded PSL assertions. +* Improve: + * speed of non-sensitized processes. + * speed of string case statement (dichotomy instead of linear search). +* bug fix: + * and improvements in SDF annotator. + * when the bound of a string literal type is not locally static. + * gcov crash + +**v0.28** (2009-09-17) +* Add `--std=08` to enable VHDL2008 features. +* Support all-sensitized processes from VHDL2008. +* Documentation typos (thanks to Peter Huewe). +* bug fix: + * handle `'pos/'leftof/'rightof/'succ/'pred` in concurrent statements. + * overloaded resolution functions. + * direct drivers elaboration for unconstrained array signals. + * many minor bugs. + +**v0.27** (2008-07-01) +* Improve SDF annotation (handles much more annotations) +* Add `--ieee-asserts=` option to control assert messages from ieee packages. +* bug fix: + * aliases in port map + * crash during elaboration for top entities with ports/generic + * crash when string literal in aggregate. + * concatenation with an array subtype element. + * non-static subtype used by type conversions in associations. + * clear timeout in wait for. + * minor bugs. + +**v0.26** (2007-04-08) +* `GHDL_PREFIX` environment variable overrides default installation prefix. +* simulation speed improved with 'direct drivers'. +* windows version: + * exceptions are caught + * use executable path instead of registry for prefix +* bug fix: + * individual association by expression (was not working) + * individual association of string + * within windows code generator + * [windows] large local variables crashed + * crash when overloaded aggregate target. + * forbid individual association with open + * crash when bad array prefix + * correctly extract sensitivity of record aggregate + +**v0.25** (2006-08-11) +* VPI functions to schedules values. +* `math_real` now works under windows. +* documentation updated for windows. +* filename/line number displayed for range error during signal update. +* bug fix: + * ieee math libraries available when `--ieee=synopsys`. + * `'image` in package bodies. + * scan of fp literals. + * interface identifier is checked for conformance rules. + * avoid a crash in case of error in configuration specification. + * non-static choice in unidim case are now correctly checked. + * do not crash in case of bad use of incomplete type. + * `'range` are not expressions. + * handle file declaration in concurrent procedure calls. + * correctly handle static `'image` attribute. + * handle in-conversion for signal associated with an expression. + * emit an error when a function tries to exit without a return. + +**v0.24** (2006-06-25) +* Handle enums with more than 256 elements. +* Relax expr static rules in 93c to analyze Xilinx core lib from 8.1 +* man page, `ghdl.1`, added. +* windows installer improved +* bug fix: + * correctly handle empty file name. + * correctly handle unused subprograms of protected types. + * avoid a crash if unused library are used. + * avoid crashes during error reports. + * add a missing case array conversion. + * build on `x86_64`. + * code generated for conversion after mod/rem (windows version). + * `-fexplicit` crashed with `std.standard` functions. + * handle recursion of pure/wait checks. + * correctly handle error cases of user attributes + * time and character read procedure of std.textio. + * initialize by value parameters (instead of copy-in). + +**v0.23** (2006-05-16) +* bug fix: + * handle implicit conversion in resolution functions. + * missing implicit conversion added. + * avoid a crash in error. + +**v0.22** (2006-03-28) +* direntry added in `ghdl.texi` +* updated: + * Documentation (explain bug in Xilinx unisim library). + * to `gcc 4.1` + * math_real +* bug fix: + * avoid crash if type conversion is indexed/sliced + * do not allow anymore uncomplete individual association + * missing check on array association + * check bounds for val attribute on enumerated type + * array inequality of locally static expressions evaluated + * configuration issue + * `--warn-no-vital-generic` is now working + +**v0.21** (2005-12-18) +* local optimizations (loops, indexed name). +* simulation speed improved by 20% due to processes mngt optimizations. +* stack-switching code ported to `x86_64` (`amd64/em64t`). +* stack-switching code ported to `ia64`. +* `--syn-binding` option extended (see documentation). +* bug fix: + * line number for some bound violation messages. + * improved message error for deferred constants. + * file parameter for functions. + * universal real divided by integer handled in locally static expr. + * `std_ulogic` types and arrays are known by VPI. + * missing space added in VCDs for integers. + * `CR+LF` is also end of line for `std.textio.readline`. + * avoid a crash if parse error on choice. + * handle `'image` in nested subprograms. + * handle `'image` for floating point types. + * do not use varargs C calls. + * handle missing `EOL` for `readline`. + * for `x86_64` + +**v0.20** (2005-10-15) +* stack memory usage improved for shortcurt operations. +* gtkwave now displays nice waves for bit and std_ulogic signals. +* time unit is displayed in assert/report message. +* `-fexplicit` option added. +* integers are now written in VCD files. +* hash table added for design_units (speed optimization). +* range checks slightly optimized. +* `--vcdz` run time option added. +* improved error message for invalid expressions. +* grt now compiles with GNAT-GPL-2005 (use a GNAT bug work-around). +* bug fix: + * handle more types for `--dump-rti` and `--wave`. + * `'last_event` and `'last_active` (bad value returned when no previous event or activity). + * `'image` attribute for physical types (was bad unit). + * `'image` attribute for locally static integers. + * for reading `.ghw` files. + * in `--xref`. + +**v0.19** (2005-08-17) +* `ADAFLAGS` has been replaced by `GHDL_ADAFLAGS` to ease compilation. +* `ieee.math_real` and `ieee.math_complex` added (only partially, based on a + draft). +* current time is printed with assert/report messages. +* stack switch assembly code ported to powerpc-linux. +* documentation on how to use grt from Ada added. +* allow indexes of indexed names to be non-static in case statements (93c only) + (this is not standard, but I can't see why it should be required). +* unbound ports of entities are now reported with `--warn-binding`. +* some error or warning messages improved. +* `--wave` option added to dump waveforms (using ghw file format). +* bug fix: + * internal error (missing close_temp for implicit read) + * `--xref-html`: avoid to reanalyze unit. + * handle implicit conversion for `'image`. + * aggregate assigned to an aggregate: avoid crash. + * array attributes on unconstrained array: avoid crash. + * `'last_event` returns `time'high` if no event. + * `'last_event` on array (uninitialized variable). + * allow calling `rising_edge` with a port of mode buffer. + * allow aliases of unconstrained arrays. + * bound error on aggregate with an unused other association. + * catch indexed/sliced component (was crashing). + * catch index/slice of a type conversion (was crashing). + * handle bad component specification in conf (was crashing). + * missing ports in component (was crashing). + * component configurations were dicarded by bug in some cases. + * no more unused warnings for subprograms in architectures (they may be used in configuration). + * allow conversion in component configuration. + * conversion in associations with not statically defined array signals. + +**v0.18** (2005-03-12) +* Keep last line number to speed-up line number look-up (improvement). +* `--warn-default-binding` added, `--warn-binding` rewritten. +* `'value` implemented for integer numbers. +* bug fix: + * in `textio.read` for time. + * `file_close` does not crash if file was already closed. + * spurious unused warnings for protected types. + * allow subtype names in slice during sensitivity extraction. + * correctly set the default value of collapsed ports. + * handling of stack2 (aka large concatenation bug). + +**v0.17** (2005-02-26) +* command `--elab-run` added. +* Code generation for aggregate improved. +* Library name of option `--work=` is checked. +* `--no-run` option added to prevent simulation (may be used to disp tree only). +* disp signal name in error when multiple sources drive an unresolved signal. +* `-m`/`--gen-makefile` now handle several libraries. +* dependences are not stored anymore in libraries (shorter/faster). +* mentor version of ieee library is now provided. +* handling of universal types is more consistent with LRM (almost corner cases). +* iterator and indexes whose bounds were universal expressions are now of type integer or erroneous, according to the weird LRM rules. +* handle selected name as entity name in architecture/configuration. +* bug fix: + * port map with expression (corner case ?). + * forbid empty extended identifiers. + * enumeration literal xrefs. + * non-object name in sensitivity list crashed. + * correctly handle alias of signals in processes. + +**v0.16** (2005-01-02) +* `std.textio`: readline has no limits on line length. +* command `-r` (run) added. +* bug fix: + * better handling of errors in type conversion. + * few uninitialized variables in ghdl itself caught. + * parse error: `begin` in aggregates. + * bad `unused subprogram` warnings. + +**v0.15** (2004-10-13) +* library file format modified to handle relative pathes. +* install fixed to use relative pathes. +* internal change: ortho API modified (constant are not anymore expressions). + +**v0.14** (2004-08-29) +* pretty printing in HTML command, `--pp-html`, added. +* xref generation in HTML command, `--xref-html`, added. +* syntax checking command, `-s`, added. +* Code generation in whole command, `-c files -e unit`, added. +* warns for unused subprograms. +* bug box added to help bug reports. +* `-s` (syntax check) command added. +* Missing grt subprogram to close non-text file added. +* maximum line length of `std.textio.readline` extended to 512 characters. +* `std.textio.readline` assert error on truncated lines. +* Handle P32 and P64 in `--trace-signals` +* sequentials statements are not canonicalized (should be faster). +* `DESTDIR` added in Makefile to ease packaging. +* for `-m` command, re-parse modified files of the work library. +* Many checks added on interfaces. +* Many checks added on associations, better handling of conversions. +* Checks for unassociated entity ports at elaboration. +* bug fix: + * resolution function can be an expanded name. + * missing type check in a corner case. + * emit an error when `EOF` is reached while a text file is read. + * `std.textio.read` for negative number. + * `std.textio.read` [integer]: correctly handle end of line. + * parameters of protected type: handled and checked. + * `gen_tree.c` modified to work with sparc. + +**v0.13** (2004-06-26) +* support of 64bits integers and 32bits time (not yet user available) +* handle `'high` and `'low` attributes on non-locally static types and subtypes. +* Many warning switches added (to control output of warnings). +* `--gen-makefile` mode added to ghdl (to generate a Makefile) +* alias identifier restrictions of vhdl-02 implemented. +* declarative region for architecture from vhdl-02 implemented. +* buffer port association rules of vhdl-02 implemented. +* method operator restrictions of vhdl-02 implemented. +* `'driving` and `'driving_value` implemented. +* run-time bound check error message now contains file name and line number. +* strings are not stored anymore with the identifiers. +* parser does not back-track anymore. +* bug fix: + * name clash in generated `.s` files (arch and port/generic names). + * implicit conversion of signal parameters. + * handle locally static type conversion of arrays. + * stabilize during elaboration of an unconstrained signal. + * revert previous `vhdl87` conf spec bug fix, according to INT-1991 issue 27. + * multiple visibility of declarations (eg: direct and alias). + * names attribute of non-object aliases. + +**v0.12** (2004-05-30) +* simulation speed improved (2 fold) due to reduced activity optimization. +* type conversion handled in associations +* make mode of ghdl improved. +* bug fix: + * attribute specification + * allow discrete type marks in choices + * handling of generate statement for VCD + * allow dereference in variable associations + * allow function conversion in block port map + * vhdl87: apply configuration specification inside generate stmts. + * catch non-passive concurrent procedure calls in entity. + * association of an unconstrained port with an expression. + * declaring an uncons. array subtype of an uncons. array subtype. + +**v0.11.1** (2004-04-24) +* bug fix: + * corner case of signal not updated + * handle `'stable`, `'quiet` with a paramater > 0 + * typos (missing `+ `) in sparc.S + +**v0.11** (2004-04-17) +* signal collapsing improved. +* simulation kernel speed improved (maybe 5x faster). +* `--lines` mode of ghdldrv added. +* boolean signals are now dumped in vcd files. +* bug fix: + * in code generation for an aggregate. + * run-time check of ascending order of projected transactions. + * empty sequence of stmts in case alternatives (unidim array). + * evaluation of locally static 'range attribute. + * implicit conversion in formal function convertor. + * return type is a type mark. + +**v0.10** (2004-02-28) +* architecture with many instances can be compiled with less memory. +* `--stats` option added to the simulator, to evaluate performance. +* signals are now collapsed between instances, if possible. +* simulation is about 3x faster. +* sparc port available (source only). +* more checks added for attribute specification. +* chop command added (split files by design unit). +* bug fix: + * absolute source files. + * empty sequence of statements in case alternatives. + +**v0.9** (2004-02-01) +* VITAL level 0 restrictions checks added. +* VITAL 2000 packages provided. +* run-time information (such as signal names) rewritten. +* SDF support added (partial and experimental). +* bug fix: + * allow elaboration even if no package body if the package is present in a file but not used by the hierarchy. + * `delay_length` range is pre-elaborated (was not in v93). + * crashed when a design unit is not found at elaboration. + * allow association of `'stable`, `'quiet`... with signal interfaces. + * concurrent procedure call creates a non-sensitized process. + * effective value of non-scalar resolved signal might not be set. + +**v0.8** (2003-11-05) +* protected types (from 1076a/1076-2000) implemented. +* file declarations are finalized in subprograms. +* an exit call-back has been added in the run-time library. +* internal modifications (nodes are stored in a table). +* name of generated executable can be set with `-o` option. +* IVI (ivi.sourceforge.org) support through a few VPI subprograms. +* pure and wait checks added. +* out ports are correctly dumped in VCD files. +* bug fix: + * signal declaration not allowed in processes. + * several bugs fixed. + +**v0.7** (2003-08-02) +* layout of internal nodes improved. +* incremental binding (vhdl93). +* association of in port with expressions (vhdl93). +* `--disp-time` option added. +* make mode (`ghdl -m`) rewritten. +* `'simple_name`, `'path_name` and `'instance_name` added (vhdl93). +* bug fix: + * instantiation added in hierarchy. + * individual association of subelements by expression. + * `--stop-delta` option is working. + * correctly handle operators names at function call. + * several small bugs fixed. + +**v0.6** (2003-06-09) +* internal modifications (single linked list used instead of arrays). +* Mentor version of std_logic_arith is provided. +* postponed handled (vhdl 93). +* declarations allowed in a generate statement (vhdl 93). +* non object aliases handled (vhdl93). +* signatures handled (vhdl93). +* bug fix: + * `xnor` on `bit` and `boolean` is working. + * `selected_name` list in use clauses. + * many other small bug fixes. + +**v0.5** (2003-05-10) +* foreign attribute handled. You can now call subprograms defined in a foreign + language (such as C or Ada). +* ghdl entry point added: you can start the VHDL simulation from your own + program. +* bug fix: + * triple use. + * incomplete types + +**v0.4.1** (2003-04-07) +* bug fix: in the vcd output. + +**v0.4** (2003-04-02) +* `libgrt` does not depend on GNAT library anymore. + Installation requirements are reduced. +* `'delayed` attribute implemented. +* `'transaction` attribute implemented. +* unaffected (from vhdl-93) implemented. +* ghdl action `--disp-standard` prints the std.standard package. +* exponentiation operator, `**`, implemented for all integer and floating + point types. +* many other small bug fixes. +* bug fix: subprogram interfaces are now elaborated. |