UVM/vmm-1.1.1a/RELEASE_INTEROP.txt - third_party/Surelog - Git at Google

 ================================================================================

 Title: Release Notes - VMM 1.1.1

 ================================================================================

 --------------------------------------------------------------------------------

 SystemVerilog compliance issues

 --------------------------------------------------------------------------------

 This section describes the changes needed to bring VMM 1.1.1 in compliance with
 the SystemVerilog standard.


 Overrides and externs must match prototype:
 Virtual and extern function argument type, identifiers must match their prototype,
 and existence of a default value must be present in the virtual override or
 extern definition. (Fixed in Questa 6.4b and after.)

     - vmm-1.1.1/sv/perf/vmm_perf_analyzer.sv
     - vmm-1.1.1/sv/perf/vmm_perf_tenure.sv


 Cross-module references in global scope are prohibited.
 Hierarchical references from within class declarations defined in $unit
 scope refer to a module *implicitly* instantiated at top-level scope.
 Statements in the top-level compilation unit are not allowed to have
 hierarchical references. In most cases, the remedy was to move the
 `include of the testbench (class) related code into the program block.
 Doing this allows the example to compile and run, but the practice
 prevents reuse of the envs in anything but the particular top-level DUT
 that it references.

     - vmm-1.1.1/sv/examples/HAL/fifo/tb_env.sv
     - vmm-1.1.1/sv/examples/HAL/fifo/test.sv
     - vmm-1.1.1/sv/examples/std_lib/ethernet/test_mii.sv
     - vmm-1.1.1/sv/examples/std_lib/ethernet/mii_env.sv
     - vmm-1.1.1/sv/examples/std_lib/ethernet/mii_if.sv


 Assigning bit-vectors to strings requires a cast.
 Added string'() cast to go from bit-vector to string datatype

     - vmm-1.1.1/sv/HAL/vmm_hw_arch_null.sv
     - vmm-1.1.1/sv/vmm_hw_rtl.sv
     - vmm-1.1.1/sv/std_lib/vmm_data_macros.sv


 In a vmm_test subtype defined using the `vmm_test_begin macro, the 'env'
 identifier is used as both a property of the class and the argument name to
 the run task. Scope resolution picks the most local scope for 'env' variable,
 which is the run task's argument. The run task's argument type is vmm_env,
 so any references to properties or methods via the env handle are restricted
 to the vmm_env base class.  To avoid having to change all the tests to
 explicitly deference the class property via 'this', the vmm_test::run task
 argument name was changed from 'env' to 'e'.

     - vmm-1.1.1/sv/std_lib/vmm.sv
     - vmm-1.1.1/sv/std_lib/vmm_test.sv


 Functions can only fork-join_none if calling process originates from initial
 blocks. vmm_xactor forks processes in their constructors (new function), which
 means that vmm_xactor subtypes can not be initialized (new'd) at the site of
 its declaration.

     - vmm-1.1.1/sv/std_lib/vmm_xactor.sv


 Functions in solve-before constraints are prohibited. VCS enables
 non-compliant usage via the `VMM_SOLVE_BEFORE_SIZE define in vmm.sv.

     - vmm-1.1.1/sv/std_lib/vmm_scenario_gen.sv


 --------------------------------------------------------------------------------

 Changes to increase VMM robustness or usability

 --------------------------------------------------------------------------------

 Some examples had robustness issues, such as race conditions in static
 initializers, process resumption order, and at end-of-test, where the last
 transaction was missed due to a premature $finish.

 The SystemVerilog standard specifies initialization order and process resumption
 order as undefined. However, the VMM depends on a particular process scheduling
 semantic and thus can not guarantee fairness across all simulators.

                                   =-=

 Process starvation can occur due to dependence on VCS process order resumption.
 Added semaphore to govern put() and inject() methods of the channel and
 atomic/scenario generators, respectively. Note: if a process waiting on the
 semaphore is killed, the semaphore state will not be consistent with system
 state.

     - vmm-1.1.1/sv/std_lib/vmm_atomic_gen.sv
     - vmm-1.1.1/sv/std_lib/vmm_scenario_gen.sv
     - vmm-1.1.1/sv/std_lib/vmm_channel.sv


 Race conditions exist in initialization of vmm_opts in vmm_test. Removed
 allocation of vmm_opts in static initializer, which causes race condition
 between it an other static initializers, such as when registering vmm_test
 instances.  As it was, there is no guarantee that vmm_test's _vmm_opts member
 is initialized before it is dereferenced.

     - vmm-1.1.1/sv/std_lib/vmm_test.sv


 Race condition between scenario registration and init of next_scenario_kind.
 Removed static initialization of vmm_scenario::next_scenario_kind to avoid
 race condition between it and calling of define_scenario in other static
 initializers. Removal is benign because ints are by default initialized
 to 0.

     - vmm-1.1.1/sv/std_lib/vmm.sv


 Hard-coded `define NO_STATIC_METHODS to make vmm_opts methods non-static.
 Caused race conditions when methods were static.


 Replaced initializer allocation of variable with procedural allocation to
 avoid race condition with static initializers that depend on initialization
 order, which is stated as undefined in the LRM.

     - vmm-1.1.1/sv/examples/std_lib/vmm_test/verif/alu_test.sv (registry)
     - vmm-1.1.1/sv/examples/subenv/oc_ethernet/blk_trivial_test.sv (blk_env)
     - vmm-1.1.1/sv/examples/subenv/oc_ethernet/sys_trivial_test.sv


 Added #0 in stop task to avoid race condition with "tenure" process, which
 needs a delta to resume and process the transaction.

     - vmm-1.1.1/sv/examples/perf/tl_bus/tb_env.sv


 An incorrect regular expression was causing segfaults in the DPI-C code.
 The regular expression was fixed, and error checking was added to the C code.

     - vmm-1.1.1/sv/perf/vmm_sql_db.sv


 Added error-checking in the DPI code to avoid segfaults.

     - vmm-1.1.1/sv/std_lib/vmm_str_dpi.c


 Moved DPI imports to inside (optional) VMM std_lib package

     - vmm-1.1.1/sv/std_lib/vmm.sv


 Added `ifdef to select whether to `include  sqlite or ascii version

     - vmm-1.1.1/sv/perf/vmm_sql.sv


 Added option to import RAL as a package.

     - vmm-1.1.1/sv/vmm_ral.sv


 Function passed an argument named obj, yet code refers to tr.

     - vmm-1.1.1/sv/examples/perf/tl_bus/bus_slave.sv


 --------------------------------------------------------------------------------

 Changes to support OVM-VMM Interoperability

 --------------------------------------------------------------------------------

 Multiple vmm_envs can be encapsulated by an ovm_component and instantiated in
 an OVM environment. We've disabled the check for multiple vmm_envs.

   - vmm-1.1.1/sv/std_lib/vmm_env.sv


 --------------------------------------------------------------------------------

 Changes to work around differences in simulator implementation

 --------------------------------------------------------------------------------

 Where the SystemVerilog standard is vague, simulators can differ in their
 implementation. Yet, for portability across simulators, it is important that
 meaningful differences in behavior be avoided.


 Expansion of embedded macros:
 Modified embedded macro invocations to workaround differences in macro
 expansion between simulators. String literal arguments between `" quotes
 in inner macro invocations can not contain commas in Questa. This is
 currently in debate in the SV standards committee.

 |   `define foo(_name) \
 |      `vmm_warning(this.log, `" vmm_data  _name object does not exist, no action`"); \

 The comma after 'exist' can be interpreted as an argument delimeter in
 the embedded `vmm_warning macro invocation.

   - vmm-1.1.1/sv/std_lib/vmm_data_macros.sv


 Argument copying in system function calls ($sformat):
 In $sformat, VCS apparently evaluates function arguments left to right.
 Later argument expressions that affect the result of earlier argument expressions
 are not reflected in the argument actuals. To work properly, an argument had to
 be copied to a temporary.

 For example, this

   $sformat(this.__vmm_image, `"%s\n%s`", this.__vmm_image, this._name[i].psdisplay(pf));

 was changed to this

   string _image = this.__vmm_image;
   $sformat(this.__vmm_image, "%s\n%s", _image, this._name[i].psdisplay(pf));

 Note the temporary variable used in 1st arg to $sformat.

   - vmm-1.1.1/sv/std_lib/vmm_data_macros.sv


 queue.delete() not legal until IEEE 1800-2009

   - vmm-1.1.1/sv/perf/vmm_perf_analyzer.sv
   - vmm-1.1.1/sv/RAL/vmm_mam.sv
   - vmm-1.1.1/sv/RAL/vmm_sb_ds_iter.sv
   - vmm-1.1.1/sv/RAL/vmm_sb_ds_stream_iter.sv
   - vmm-1.1.1/sv/std_lib/vmm_channel.sv
   - vmm-1.1.1/sv/std_lib/vmm_consensus.sv
   - vmm-1.1.1/sv/std_lib/vmm_log.sv
   - vmm-1.1.1/sv/std_lib/vmm_scheduler.sv
   - vmm-1.1.1/sv/std_lib/vmm_watchdog.sv
   - vmm-1.1.1/sv/std_lib/vmm_xactor.sv
   - vmm-1.1.1/sv/std_lib/vmm_xvc_manager.sv
   - vmm-1.1.1/sv/std_lib/xvc_xactor.sv


 --------------------------------------------------------------------------------

 Changes to work around IUS limitations

 --------------------------------------------------------------------------------

 The following changes were made to either enable running VMM 1.1.1 on earlier
 versions of IUS or to work around temporary limitations in IUS.


 foreach on queues and dynamic arrays were changed

   | foreach(ref.id[index])
   |
   |  to
   |
   | for(int index=0; index<ref.id.size(); ++index)

 foreach on associative arrays were changed

   | foreach(ref.id[index])
   |
   |  to
   |
   | index_type index;
   | if(ref.id.first(index))
   | do begin
   |   ...
   | end while(ref.id.next(index));

   - vmm-1.1.1/sv/examples/perf/tl_bus/bus_model.sv
   - vmm-1.1.1/sv/examples/perf/tl_bus/tb_env.sv
   - vmm-1.1.1/sv/examples/sb/apb_bus/tb_env.sv
   - vmm-1.1.1/sv/examples/std_lib/ethernet/eth_frame_scenario_gen.sv
   - vmm-1.1.1/sv/examples/std_lib/ethernet/eth_frame.sv
   - vmm-1.1.1/sv/examples/std_lib/ethernet/mac.sv
   - vmm-1.1.1/sv/examples/std_lib/mss_simple/msgen_example.sv
   - vmm-1.1.1/sv/examples/std_lib/record_replay/driver.sv
   - vmm-1.1.1/sv/examples/subenv/oc_ethernet/ethernet/eth_frame.sv
   - vmm-1.1.1/sv/perf/vmm_perf_analyzer.sv
   - vmm-1.1.1/sv/perf/vmm_sql_db_ascii.sv
   - vmm-1.1.1/sv/RAL/vmm_mam.sv
   - vmm-1.1.1/sv/RAL/vmm_ral_block_or_sys.sv
   - vmm-1.1.1/sv/RAL/vmm_ral_block.sv
   - vmm-1.1.1/sv/RAL/vmm_ral_field.sv
   - vmm-1.1.1/sv/RAL/vmm_ral_mem.sv
   - vmm-1.1.1/sv/RAL/vmm_ral_reg.sv
   - vmm-1.1.1/sv/RAL/vmm_ral_vfield.sv
   - vmm-1.1.1/sv/RAL/vmm_ral_vreg.sv
   - vmm-1.1.1/sv/RAL/vmm_sb_ds_iter.sv
   - vmm-1.1.1/sv/RAL/vmm_sb_ds_stream_iter.sv
   - vmm-1.1.1/sv/RAL/vmm_sb_ds.sv
   - vmm-1.1.1/sv/std_lib/vmm_broadcast.sv
   - vmm-1.1.1/sv/std_lib/vmm_consensus.sv
   - vmm-1.1.1/sv/std_lib/vmm_data_macros.sv
   - vmm-1.1.1/sv/std_lib/vmm_env_macros.sv
   - vmm-1.1.1/sv/std_lib/vmm_log.sv
   - vmm-1.1.1/sv/std_lib/vmm_ms_scenario_gen.sv
   - vmm-1.1.1/sv/std_lib/vmm_notify.sv
   - vmm-1.1.1/sv/std_lib/vmm_scenario_gen.sv
   - vmm-1.1.1/sv/std_lib/vmm_scheduler.sv
   - vmm-1.1.1/sv/std_lib/vmm_subenv_macros.sv
   - vmm-1.1.1/sv/std_lib/vmm.sv
   - vmm-1.1.1/sv/std_lib/vmm_watchdog.sv
   - vmm-1.1.1/sv/std_lib/vmm_xactor_macros.sv
   - vmm-1.1.1/sv/std_lib/vmm_xactor.sv
   - vmm-1.1.1/sv/std_lib/vmm_xvc_event.sv
   - vmm-1.1.1/sv/std_lib/vmm_xvc_manager.sv
   - vmm-1.1.1/sv/std_lib/xvc_manager.sv
   - vmm-1.1.1/sv/std_lib/xvc_xactor.sv


 Parantheses in system functions not tolerated (seen as a null argument):

   - vmm-1.1.1/sv/examples/perf/tl_bus/bus_model.sv
   - vmm-1.1.1/sv/examples/perf/tl_bus/bus_slave.sv
   - vmm-1.1.1/sv/examples/sb/apb_bus/tb_env.sv
   - vmm-1.1.1/sv/examples/std_lib/ethernet/mac.sv
   - vmm-1.1.1/sv/examples/std_lib/vmm_test/rtl/alu.v
   - vmm-1.1.1/sv/examples/subenv/oc_ethernet/ethernet/mac.sv
   - vmm-1.1.1/sv/examples/subenv/oc_ethernet/ethernet/mii_phy.sv
   - vmm-1.1.1/sv/examples/subenv/oc_ethernet/sys_env.sv
   - vmm-1.1.1/sv/perf/vmm_perf_analyzer.sv
   - vmm-1.1.1/sv/std_lib/vmm_log.sv
   - vmm-1.1.1/sv/std_lib/vmm_notify.sv


 Missing parantheses in built-in functions not tolerated (seen as a null
 argument):

   - vmm-1.1.1/sv/examples/std_lib/record_replay/tb_cfg.sv
   - vmm-1.1.1/sv/RAL/vmm_ral_mem.sv


 No support for replicate operator for strings {4{" "}}

   - vmm-1.1.1/sv/RAL/vmm_sb_ds.sv
   - vmm-1.1.1/sv/std_lib/xvc_action.sv


 Queue of string elements in $sformat not implemented

   - vmm-1.1.1/sv/std_lib/vmm_data_macros.sv


 In some cases, IUS thinks the result of a {} is a bitvector instead of a string.
 Use $sformatf or similar alternative.

   - vmm-1.1.1/sv/std_lib/vmm_data_macros.sv
   - vmm-1.1.1/sv/std_lib/vmm_opts.sv


 Argument to $test$plusargs needs to be a bit vector, not string.

   - vmm-1.1.1/sv/std_lib/vmm_opts.sv
   - vmm-1.1.1/sv/std_lib/vmm.sv


 No access into a qda in a $sformat call.

   - vmm-1.1.1/sv/std_lib/vmm_data_macros.sv


 Problem with same sequence name in different clocking blocks of the same interface.

   - vmm-1.1.1/sv/examples/sb/apb_bus/apb/apb_if.sv


 Can not static cast bit vector to string

   - vmm-1.1.1/sv/HAL/vmm_hw_arch_null.sv
   - vmm-1.1.1/sv/std_lib/vmm_data_macros.sv


 No support break/continue in a disabled block

   - vmm-1.1.1/sv/examples/perf/tl_bus/bus_model.sv
   - vmm-1.1.1/sv/examples/sb/apb_bus/apb/apb_slave.sv
   - vmm-1.1.1/sv/examples/std_lib/ethernet/mac.sv
   - vmm-1.1.1/sv/examples/std_lib/ethernet/mii_phy.sv
   - vmm-1.1.1/sv/examples/std_lib/wishbone/slave.sv
   - vmm-1.1.1/sv/examples/subenv/oc_ethernet/ethernet/mac.sv


 IUS doesn't support protected constructors.

   - vmm-1.1.1/sv/std_lib/vmm.sv


 <END RELEASE NOTES>
	================================================================================

	Title: Release Notes - VMM 1.1.1

	================================================================================

	--------------------------------------------------------------------------------

	SystemVerilog compliance issues

	--------------------------------------------------------------------------------

	This section describes the changes needed to bring VMM 1.1.1 in compliance with
	the SystemVerilog standard.


	Overrides and externs must match prototype:
	Virtual and extern function argument type, identifiers must match their prototype,
	and existence of a default value must be present in the virtual override or
	extern definition. (Fixed in Questa 6.4b and after.)

	- vmm-1.1.1/sv/perf/vmm_perf_analyzer.sv
	- vmm-1.1.1/sv/perf/vmm_perf_tenure.sv


	Cross-module references in global scope are prohibited.
	Hierarchical references from within class declarations defined in $unit
	scope refer to a module implicitly instantiated at top-level scope.
	Statements in the top-level compilation unit are not allowed to have
	hierarchical references. In most cases, the remedy was to move the
	`include of the testbench (class) related code into the program block.
	Doing this allows the example to compile and run, but the practice
	prevents reuse of the envs in anything but the particular top-level DUT
	that it references.

	- vmm-1.1.1/sv/examples/HAL/fifo/tb_env.sv
	- vmm-1.1.1/sv/examples/HAL/fifo/test.sv
	- vmm-1.1.1/sv/examples/std_lib/ethernet/test_mii.sv
	- vmm-1.1.1/sv/examples/std_lib/ethernet/mii_env.sv
	- vmm-1.1.1/sv/examples/std_lib/ethernet/mii_if.sv


	Assigning bit-vectors to strings requires a cast.
	Added string'() cast to go from bit-vector to string datatype

	- vmm-1.1.1/sv/HAL/vmm_hw_arch_null.sv
	- vmm-1.1.1/sv/vmm_hw_rtl.sv
	- vmm-1.1.1/sv/std_lib/vmm_data_macros.sv


	In a vmm_test subtype defined using the `vmm_test_begin macro, the 'env'
	identifier is used as both a property of the class and the argument name to
	the run task. Scope resolution picks the most local scope for 'env' variable,
	which is the run task's argument. The run task's argument type is vmm_env,
	so any references to properties or methods via the env handle are restricted
	to the vmm_env base class. To avoid having to change all the tests to
	explicitly deference the class property via 'this', the vmm_test::run task
	argument name was changed from 'env' to 'e'.

	- vmm-1.1.1/sv/std_lib/vmm.sv
	- vmm-1.1.1/sv/std_lib/vmm_test.sv


	Functions can only fork-join_none if calling process originates from initial
	blocks. vmm_xactor forks processes in their constructors (new function), which
	means that vmm_xactor subtypes can not be initialized (new'd) at the site of
	its declaration.

	- vmm-1.1.1/sv/std_lib/vmm_xactor.sv


	Functions in solve-before constraints are prohibited. VCS enables
	non-compliant usage via the `VMM_SOLVE_BEFORE_SIZE define in vmm.sv.

	- vmm-1.1.1/sv/std_lib/vmm_scenario_gen.sv



	--------------------------------------------------------------------------------

	Changes to increase VMM robustness or usability

	--------------------------------------------------------------------------------

	Some examples had robustness issues, such as race conditions in static
	initializers, process resumption order, and at end-of-test, where the last
	transaction was missed due to a premature $finish.

	The SystemVerilog standard specifies initialization order and process resumption
	order as undefined. However, the VMM depends on a particular process scheduling
	semantic and thus can not guarantee fairness across all simulators.

	=-=

	Process starvation can occur due to dependence on VCS process order resumption.
	Added semaphore to govern put() and inject() methods of the channel and
	atomic/scenario generators, respectively. Note: if a process waiting on the
	semaphore is killed, the semaphore state will not be consistent with system
	state.

	- vmm-1.1.1/sv/std_lib/vmm_atomic_gen.sv
	- vmm-1.1.1/sv/std_lib/vmm_scenario_gen.sv
	- vmm-1.1.1/sv/std_lib/vmm_channel.sv


	Race conditions exist in initialization of vmm_opts in vmm_test. Removed
	allocation of vmm_opts in static initializer, which causes race condition
	between it an other static initializers, such as when registering vmm_test
	instances. As it was, there is no guarantee that vmm_test's _vmm_opts member
	is initialized before it is dereferenced.

	- vmm-1.1.1/sv/std_lib/vmm_test.sv


	Race condition between scenario registration and init of next_scenario_kind.
	Removed static initialization of vmm_scenario::next_scenario_kind to avoid
	race condition between it and calling of define_scenario in other static
	initializers. Removal is benign because ints are by default initialized
	to 0.

	- vmm-1.1.1/sv/std_lib/vmm.sv


	Hard-coded `define NO_STATIC_METHODS to make vmm_opts methods non-static.
	Caused race conditions when methods were static.


	Replaced initializer allocation of variable with procedural allocation to
	avoid race condition with static initializers that depend on initialization
	order, which is stated as undefined in the LRM.

	- vmm-1.1.1/sv/examples/std_lib/vmm_test/verif/alu_test.sv (registry)
	- vmm-1.1.1/sv/examples/subenv/oc_ethernet/blk_trivial_test.sv (blk_env)
	- vmm-1.1.1/sv/examples/subenv/oc_ethernet/sys_trivial_test.sv


	Added #0 in stop task to avoid race condition with "tenure" process, which
	needs a delta to resume and process the transaction.

	- vmm-1.1.1/sv/examples/perf/tl_bus/tb_env.sv


	An incorrect regular expression was causing segfaults in the DPI-C code.
	The regular expression was fixed, and error checking was added to the C code.

	- vmm-1.1.1/sv/perf/vmm_sql_db.sv


	Added error-checking in the DPI code to avoid segfaults.

	- vmm-1.1.1/sv/std_lib/vmm_str_dpi.c


	Moved DPI imports to inside (optional) VMM std_lib package

	- vmm-1.1.1/sv/std_lib/vmm.sv


	Added `ifdef to select whether to `include sqlite or ascii version

	- vmm-1.1.1/sv/perf/vmm_sql.sv


	Added option to import RAL as a package.

	- vmm-1.1.1/sv/vmm_ral.sv


	Function passed an argument named obj, yet code refers to tr.

	- vmm-1.1.1/sv/examples/perf/tl_bus/bus_slave.sv



	--------------------------------------------------------------------------------

	Changes to support OVM-VMM Interoperability

	--------------------------------------------------------------------------------

	Multiple vmm_envs can be encapsulated by an ovm_component and instantiated in
	an OVM environment. We've disabled the check for multiple vmm_envs.

	- vmm-1.1.1/sv/std_lib/vmm_env.sv



	--------------------------------------------------------------------------------

	Changes to work around differences in simulator implementation

	--------------------------------------------------------------------------------

	Where the SystemVerilog standard is vague, simulators can differ in their
	implementation. Yet, for portability across simulators, it is important that
	meaningful differences in behavior be avoided.


	Expansion of embedded macros:
	Modified embedded macro invocations to workaround differences in macro
	expansion between simulators. String literal arguments between `" quotes
	in inner macro invocations can not contain commas in Questa. This is
	currently in debate in the SV standards committee.

	\| `define foo(_name) \
	\| `vmm_warning(this.log, `" vmm_data _name object does not exist, no action`"); \

	The comma after 'exist' can be interpreted as an argument delimeter in
	the embedded `vmm_warning macro invocation.

	- vmm-1.1.1/sv/std_lib/vmm_data_macros.sv


	Argument copying in system function calls ($sformat):
	In $sformat, VCS apparently evaluates function arguments left to right.
	Later argument expressions that affect the result of earlier argument expressions
	are not reflected in the argument actuals. To work properly, an argument had to
	be copied to a temporary.

	For example, this

	$sformat(this.__vmm_image, `"%s\n%s`", this.__vmm_image, this._name[i].psdisplay(pf));

	was changed to this

	string _image = this.__vmm_image;
	$sformat(this.__vmm_image, "%s\n%s", _image, this._name[i].psdisplay(pf));

	Note the temporary variable used in 1st arg to $sformat.

	- vmm-1.1.1/sv/std_lib/vmm_data_macros.sv


	queue.delete() not legal until IEEE 1800-2009

	- vmm-1.1.1/sv/perf/vmm_perf_analyzer.sv
	- vmm-1.1.1/sv/RAL/vmm_mam.sv
	- vmm-1.1.1/sv/RAL/vmm_sb_ds_iter.sv
	- vmm-1.1.1/sv/RAL/vmm_sb_ds_stream_iter.sv
	- vmm-1.1.1/sv/std_lib/vmm_channel.sv
	- vmm-1.1.1/sv/std_lib/vmm_consensus.sv
	- vmm-1.1.1/sv/std_lib/vmm_log.sv
	- vmm-1.1.1/sv/std_lib/vmm_scheduler.sv
	- vmm-1.1.1/sv/std_lib/vmm_watchdog.sv
	- vmm-1.1.1/sv/std_lib/vmm_xactor.sv
	- vmm-1.1.1/sv/std_lib/vmm_xvc_manager.sv
	- vmm-1.1.1/sv/std_lib/xvc_xactor.sv


	--------------------------------------------------------------------------------

	Changes to work around IUS limitations

	--------------------------------------------------------------------------------

	The following changes were made to either enable running VMM 1.1.1 on earlier
	versions of IUS or to work around temporary limitations in IUS.


	foreach on queues and dynamic arrays were changed

	\| foreach(ref.id[index])
	\|
	\| to
	\|
	\| for(int index=0; index<ref.id.size(); ++index)

	foreach on associative arrays were changed

	\| foreach(ref.id[index])
	\|
	\| to
	\|
	\| index_type index;
	\| if(ref.id.first(index))
	\| do begin
	\| ...
	\| end while(ref.id.next(index));

	- vmm-1.1.1/sv/examples/perf/tl_bus/bus_model.sv
	- vmm-1.1.1/sv/examples/perf/tl_bus/tb_env.sv
	- vmm-1.1.1/sv/examples/sb/apb_bus/tb_env.sv
	- vmm-1.1.1/sv/examples/std_lib/ethernet/eth_frame_scenario_gen.sv
	- vmm-1.1.1/sv/examples/std_lib/ethernet/eth_frame.sv
	- vmm-1.1.1/sv/examples/std_lib/ethernet/mac.sv
	- vmm-1.1.1/sv/examples/std_lib/mss_simple/msgen_example.sv
	- vmm-1.1.1/sv/examples/std_lib/record_replay/driver.sv
	- vmm-1.1.1/sv/examples/subenv/oc_ethernet/ethernet/eth_frame.sv
	- vmm-1.1.1/sv/perf/vmm_perf_analyzer.sv
	- vmm-1.1.1/sv/perf/vmm_sql_db_ascii.sv
	- vmm-1.1.1/sv/RAL/vmm_mam.sv
	- vmm-1.1.1/sv/RAL/vmm_ral_block_or_sys.sv
	- vmm-1.1.1/sv/RAL/vmm_ral_block.sv
	- vmm-1.1.1/sv/RAL/vmm_ral_field.sv
	- vmm-1.1.1/sv/RAL/vmm_ral_mem.sv
	- vmm-1.1.1/sv/RAL/vmm_ral_reg.sv
	- vmm-1.1.1/sv/RAL/vmm_ral_vfield.sv
	- vmm-1.1.1/sv/RAL/vmm_ral_vreg.sv
	- vmm-1.1.1/sv/RAL/vmm_sb_ds_iter.sv
	- vmm-1.1.1/sv/RAL/vmm_sb_ds_stream_iter.sv
	- vmm-1.1.1/sv/RAL/vmm_sb_ds.sv
	- vmm-1.1.1/sv/std_lib/vmm_broadcast.sv
	- vmm-1.1.1/sv/std_lib/vmm_consensus.sv
	- vmm-1.1.1/sv/std_lib/vmm_data_macros.sv
	- vmm-1.1.1/sv/std_lib/vmm_env_macros.sv
	- vmm-1.1.1/sv/std_lib/vmm_log.sv
	- vmm-1.1.1/sv/std_lib/vmm_ms_scenario_gen.sv
	- vmm-1.1.1/sv/std_lib/vmm_notify.sv
	- vmm-1.1.1/sv/std_lib/vmm_scenario_gen.sv
	- vmm-1.1.1/sv/std_lib/vmm_scheduler.sv
	- vmm-1.1.1/sv/std_lib/vmm_subenv_macros.sv
	- vmm-1.1.1/sv/std_lib/vmm.sv
	- vmm-1.1.1/sv/std_lib/vmm_watchdog.sv
	- vmm-1.1.1/sv/std_lib/vmm_xactor_macros.sv
	- vmm-1.1.1/sv/std_lib/vmm_xactor.sv
	- vmm-1.1.1/sv/std_lib/vmm_xvc_event.sv
	- vmm-1.1.1/sv/std_lib/vmm_xvc_manager.sv
	- vmm-1.1.1/sv/std_lib/xvc_manager.sv
	- vmm-1.1.1/sv/std_lib/xvc_xactor.sv


	Parantheses in system functions not tolerated (seen as a null argument):

	- vmm-1.1.1/sv/examples/perf/tl_bus/bus_model.sv
	- vmm-1.1.1/sv/examples/perf/tl_bus/bus_slave.sv
	- vmm-1.1.1/sv/examples/sb/apb_bus/tb_env.sv
	- vmm-1.1.1/sv/examples/std_lib/ethernet/mac.sv
	- vmm-1.1.1/sv/examples/std_lib/vmm_test/rtl/alu.v
	- vmm-1.1.1/sv/examples/subenv/oc_ethernet/ethernet/mac.sv
	- vmm-1.1.1/sv/examples/subenv/oc_ethernet/ethernet/mii_phy.sv
	- vmm-1.1.1/sv/examples/subenv/oc_ethernet/sys_env.sv
	- vmm-1.1.1/sv/perf/vmm_perf_analyzer.sv
	- vmm-1.1.1/sv/std_lib/vmm_log.sv
	- vmm-1.1.1/sv/std_lib/vmm_notify.sv


	Missing parantheses in built-in functions not tolerated (seen as a null
	argument):

	- vmm-1.1.1/sv/examples/std_lib/record_replay/tb_cfg.sv
	- vmm-1.1.1/sv/RAL/vmm_ral_mem.sv


	No support for replicate operator for strings {4{" "}}

	- vmm-1.1.1/sv/RAL/vmm_sb_ds.sv
	- vmm-1.1.1/sv/std_lib/xvc_action.sv


	Queue of string elements in $sformat not implemented

	- vmm-1.1.1/sv/std_lib/vmm_data_macros.sv


	In some cases, IUS thinks the result of a {} is a bitvector instead of a string.
	Use $sformatf or similar alternative.

	- vmm-1.1.1/sv/std_lib/vmm_data_macros.sv
	- vmm-1.1.1/sv/std_lib/vmm_opts.sv


	Argument to $test$plusargs needs to be a bit vector, not string.

	- vmm-1.1.1/sv/std_lib/vmm_opts.sv
	- vmm-1.1.1/sv/std_lib/vmm.sv


	No access into a qda in a $sformat call.

	- vmm-1.1.1/sv/std_lib/vmm_data_macros.sv


	Problem with same sequence name in different clocking blocks of the same interface.

	- vmm-1.1.1/sv/examples/sb/apb_bus/apb/apb_if.sv


	Can not static cast bit vector to string

	- vmm-1.1.1/sv/HAL/vmm_hw_arch_null.sv
	- vmm-1.1.1/sv/std_lib/vmm_data_macros.sv


	No support break/continue in a disabled block

	- vmm-1.1.1/sv/examples/perf/tl_bus/bus_model.sv
	- vmm-1.1.1/sv/examples/sb/apb_bus/apb/apb_slave.sv
	- vmm-1.1.1/sv/examples/std_lib/ethernet/mac.sv
	- vmm-1.1.1/sv/examples/std_lib/ethernet/mii_phy.sv
	- vmm-1.1.1/sv/examples/std_lib/wishbone/slave.sv
	- vmm-1.1.1/sv/examples/subenv/oc_ethernet/ethernet/mac.sv


	IUS doesn't support protected constructors.

	- vmm-1.1.1/sv/std_lib/vmm.sv


	<END RELEASE NOTES>