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RELEASENOTES-1.2.md

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Device Modeling Language (DML) 1.2

  • major 6

  • note 6 Fixed a bug that caused a crash on the expression 1 << 64 (fixes HSD-1306575446).

  • release 6 6012

  • note 6 The read and write templates have been moved from utility.dml to always be included into 1.2 DML files. Additionally they are now inherited by all registers and fields by default. If you now see a name clash on read or write templates, you will need to rename your user-code defined templates.

  • release 6 6018

  • note 6 The get and set methods are now shared in attributes inheriting from the DML 1.4 utility templates (bool_attr etc.).

  • release 6 6019

  • note 6 The import statement has been changed: If the path starts with ./, the path is now interpreted relative to the directory of the importing file (fixes HSD-2209506845).

  • note 6 Fixed a bug that caused a bad warning and incorrect code when the operand to sizeof is an identifier that can be resolved both to a value and to a type.

  • release 6 6024

  • note 6 The project build environment is now sensitive to an environment variable DMLC_PORTING_TAG_FILE, which should be a filename. When defined, DMLC will create the file if it doesn't already exists, and then append data to the end of the file, containing machine-readable instructions on how to port the device to DML 1.4. The typical use case is to set this variable when building one or more modules, and feed the resulting file as input to the port-dml.py script. The -P command-line argument has also been changed: it now takes a filename argument, and can be used without -T.

  • release 6 6026

  • note 6 Changed the order in which registers are being reset upon hard_reset or soft_reset, and the ordering of the parameters mapped_registers and unmapped_registers. The order is still considered undefined, but in practice it now changes less randomly, and is equal on Simics 5 and Simics 6.

  • note 6 Fixed a bug in nested foreach loops when traversing register arrays inside bank arrays (fixes HSD-1809370911).

  • release 6 6031

  • note 6 It is now permitted to use the nothrow annotation on a method override even if the overridden method does not. This is sometimes useful while porting a large code base to DML 1.4, because it allows get and set methods in common code to be declared as non-throwing, which is required by the DML 1.4 standard library.

  • note 6 Fixed a language inconsistency: When DML 1.4 code contains an if statement inside a method body, and this code is imported from a DML 1.2 file, then the statement used to be interpreted as a DML 1.2 if statement; it is now interpreted as a DML 1.4 if statement as expected. The difference is that if the if condition is constant, then DML 1.2 would discard the dead branch without checking for errors, while 1.4 evaluates both the live and dead branch. This change can give new compile errors in existing code; in this case, you can normally resolve the problem by changing if to #if.

  • release 6 6036

  • note 6 Field arrays are now fully supported and documented, and don't give compile warnings.

  • note 6 Fixed a DMLC crash when generating porting tags.

  • note 6 Add porting rule for uses of 1-bit fields as booleans; converts if (f) into if (f != 0).

  • release 6 6041

  • note 6 Fixed a problem with the template custom_time_event from dml12-compatibility.dml.

  • release 6 6048

  • note 6 Applying bitwise not (~) on a boolean value now gives a compile error. Previously it resulted in an unconditionally true value, which is not what you want.

  • release 6 6049

  • note 6 Fixed an issue with using endian integers as arguments in pointer arithmetic.

  • note 6 Fixed an issue preventing assignment from const layout-typed pointers.

  • release 6 6050

  • note 6 Taking the address of a bitfield type in a layout will now correctly give you a pointer of the bitfield type.

  • release 6 6053

  • note 6 Fixed a crash on methods marked nothrow and multiple return arguments, returning a typed template or struct type (fixes HSD-18012036595).

  • note 6 The file dml12-compatibility.dml now adds a parameter val to field objects.

  • release 6 6054

  • note 6 Unmapped registers names are now properly anonymized according to _confidentiality (fixes HSD-1508117636).

  • release 6 6059

  • note 6 Fixed a regression in use cases where if has a constant condition, and the taken branch consists of a variable declaration. I.e., if the code if (true) local int x; appears in a scope, then the variable x is now added to that scope (fixes HSD-18013028128).

  • release 6 6066

  • note 6 If a static variable is declared within a method declared under an object array, it will now result in a separate instance of the variable for each instance of the containing object (fixes SIMICS-13738).

  • release 6 6079

  • note 6 It is no longer possible to override the loggroup parameter inside a group object.

  • note 6 Added documentation of the nothrow annotation for methods (fixes HSD-18012035545).

  • release 6 6082

  • note 6 Fixed a compile error when a DML 1.2 device imports a DML 1.4 file that declares a saved variable inside a register or field (fixes SIMICS-17201).

  • release 6 6096

  • note 6 Fixed an issue causing assertion error when accessing the register info of a 1.2 multi-dimensional bank array (fixes SIMICS-17308).

  • release 6 6100

  • note 6 Added the --state-change-dml12 flag, allowing the use of an incomplete version of state change notifiers in DML 1.2 devices (fixes SIMICS-17952).

  • release 6 6122

  • note 6 Fixed an issue when using the --state-change-dml12 flag together with the --split-c-file flag (fixes SIMICS-17975).

  • release 6 6124

  • note 6 Fixed a few issues where confidential information could be leaked through non-confidential children of confidential objects. Specifically, these issues occurred with event objects belonging to confidential registers, after calls to methods belonging to confidential objects, and accessing qname of non-confidential children belonging to confidential objects.

    A warning is now emitted when qname of a non-confidential child of a confidential object is used outside of log statements (fixes SIMICS-18428).

  • release 6 6132

  • note 6 Like in DML 1.4, objects of type port can now be placed inside group objects. However, bank objects are still restricted to top level (fixes SIMICS-19009). The new object type subobject is not directly accessible in DML 1.2, but it is permitted to import DML 1.4 code that declares subobject objects.

  • release 6 6149

  • note 6 Add porting rule for uses of undefined as register offsets; replaces such uses with unmapped_offset (fixes SIMINT-1486).

  • release 6 6158

  • note 6 Fixed issue where certain parameters defined in DML 1.4 modules couldn't be referenced within DML 1.2 modules without the use of $.

  • release 6 6160

  • note 6 Add porting rule to convert the int1 type into uint1 in DML 1.4, which better resembles how the type works in 1.2.

  • release 6 6213

  • note 6 Improve porting rules for method return values: In some simple cases, avoid storing the method's return value in an intermediate local variable.

  • release 6 6215

  • note 6 If a bank declared with use_io_memory=false in a DML 1.4 file is imported from a DML 1.2 device, using the dml12-compatibility.dml library, then a call to the transaction_access method will now trigger a proper bank access. Also, if a bank uses the dml12_compat_io_memory_access template, then overrides of the transaction_access method will be honored. This simplifies future transition to the Simics 7 API.

  • release 6 6218

  • major 7

  • release 6 6316

  • release 7 7027

  • release 7 7029

  • release 6 6320

  • release 7 7032

  • release 6 6321

  • release 7 7033

  • release 6 6324