Resource binding partial

Resource constraints - that both limit the number of instances allocated for each resource type, and partially bind operations to specific instances of the resource p[Pg.187]

Timing and resource constraints Minimum and maximum timing constraints between the activation of operations can be explicitly specified in HardwareC. The language also supports resource constraints in terms of partial binding information and resource usage bounds. 

HardwareC supports two categories of design constraints timing and resource constraints. Timing constraints define upper and lower bounds on the time separation between operations. Resource constraints specify the number of resource components available, and partially bind calls to specific instances in the hardware implementation. The designer can also imbed arbitrary constraints in the description. This capability allows the designer to convey information that may be used by later synthesis steps. 

Resource constraints limit the number of instances that can be allocated for a specified type of resource. This upper bound constraint is described as attributes in the language. Partial binding of operations to resources using explicit model instantiation is another form of resource constraint. 

A partial binding can be defined for more than one allocation, where it is assumed that the number of resources required by the partial binding is satisfied by these allocations. This leads to the concept of compatible bindings, defined below. 

In other words, a compatible binding can be derived fix)m a given partial binding by mapping all hardware-unbound vertices to resource instances. Obviously,... 

Given resource constraints in the form of a partial binding / p and a set of resource allocations ai,the design space of a sequencing graph G,(y, E, 6) is defined as follows. 

An important aspect of the design space formulation is that it is a complete charactmzation of the entire set of possible design tradeoffs for a given allocation of resources. This formulation allows partial binding information to be uniformly incorporated, where the partial binding is used to limit the design... 

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