SPP Tool Chain
2.2 Computational Cores

SPML supports explicit representation of the computational cores that implement Primitive components. The following elements are described how to modeling the computational cores.

The modeling elements that are used in representing a dataflow graph are described below. The description consists of a name of the modeling element, the stereotype of the modeling element which indicates the concrete syntactic realization of the element in GME (i.e. Folder, Model, Atom, Connection, Set, etc.), an explanation of the role and purpose of modeling element, and a description of the attributes of the modeling element. For additional details on understanding the concrete syntactic constructs of GME, please refer to the GME documentation.

1.    Core

Stereotype:	Model
Description:	Core model is contained in ImplAspect of Primitive model to represent a computational module.
Attribute:	Name DataType Note FileName String File name of the generated code WCET String worst case execution time Power String   CLB String

2.    Arg, IndexedArg

Stereotype:	Atom
Description:	Abstract base classes that help capture common characteristics of the concrete argument atom classes.

3.    InArg

Icon:
Stereotype:	Atom
Description:	InArg captures the characteristics of the input argument.
Attribute:	Name DataType Note Index Integer   IsIndexType Boolean   Modifier Enumeration:       none, ptr, ref       ptrptr, ptrref   isConst Boolean

4.    OutArg

Icon:
Stereotype:	Atom
Description:	OutArg captures the characteristics of the output argument.
Attribute:	Name DataType Note Index Integer   IsIndexType Boolean   Modifier Enumeration:       none, ptr, ref       ptrptr, ptrref   ownMemory Boolean

5.    InOutArg

Icon:
Stereotype:	Atom
Description:	InOutArg captures the characteristics of the input/output argument.
Attribute:	Name DataType Note Index Integer   IsIndexType Boolean   Modifier Enumeration:       none, ptr, ref       ptrptr, ptrref   ownMemory Boolean

6.    ReturnArg

Icon:
Stereotype:	Atom
Description:	ReturnArg captures the characteristics of the return argument.
Attribute:	Name DataType Note IsIndexType Boolean   Modifier Enumeration:       none, ptr, ref       ptrptr, ptrref

7.    DataTypeRef

Icon:
Stereotype:	Reference
Description:	DataTypeRef is the reference referred to a data type.

8.    ArgType

Stereotype:	Connection
Description:	ArgType is the association between Arg and TVDTR which is base abstract class of DataTypeRef and TypeVar(please see 2.4 DataTypes). All the argument elements (InArg, OutArg, InOutArg, ReturnArg) can be typed by setting an ArgType association with a DataTypeRef referred to a datatype or a type variable.

9.    ArgMap

Stereotype:	Connection
Description:	ArgMap connection can be used to capture the mapping between the ports of the Primitive to the arguments of the Core. This mapping represents the integration of computational cores into the component and it is used to synthesize the platform integration (wrapper) code that invokes the core, when the component is executed in the context of the platform.
Attribute:	Name DataType Note MappingType Enumeration:       Pointer, Size, Value Define the data passing semantics:         Pointer:    a pointer to the block of data         Size:          size of the block of data         Value:       the value of scalar data

10.    TypeVar

Icon:
Stereotype:	Set
Description:	TypeVar specifies the type variables which are used to capture type-polymorphism by a set which can contain multiple DataTypeRef-s as set members representing the valid types that can be assigned to the type variable.
Attribute:	Name DataType Note Index Integer   BoundType String Capture the type bound to a particular instance of the component. OCL constraints have been included in the meta-model that ensure that every TypeVar has a valid bound type i.e. the type listed in 'BoundType' attribute is related to the TypeVar object through a set membership relation.

11.    TypeMap

Stereotype:	Connection
Description:

12.    TVDTR
          Described in 2.4. DataTypes

The metamodel of the above elements is shown as below:

Related Information

Build Primitive Software ComponentType

Build Primitive Hardware ComponentType

Next Up: 2.3 Conditional Classifier