Method, system and program product providing a configuration specification language supporting arbitrary mapping functions for configuration constructs
View Patent ↗A method is disclosed of associating a mapping function with a configuration construct of a digital design defined by one or more hardware description language (HDL) files. According to the method, in the HDL files, a configuration latch is specified within a design entity forming at least a portion of the digital design. In addition, a Dial is specified that defines a relationship between each of a plurality of input values and a respective one of a plurality of different output values. The HDL files also include a statement that instantiates an instance of the Dial in association with the configuration latch such that a one-to-one correspondence exists between a value contained within the configuration latch and an input value of the instance of the Dial. The HDL files further include a statement associating the Dial with a mapping function that applies a selected transformation to values read from or written to the instance of the Dial.
1. A method in a data processing system of setting a value of a configuration latch in a design entity of a digital system, said method comprising:
in response to receiving an input value for an instantiation of a Dial, said Dial defining a relationship between each of a plurality of Dial input values of the Dial and a respective one of a plurality of different Dial output values of the Dial:
accessing a configuration database to determine whether said Dial has an associated mapping function;
deriving a value from the input value based upon the relationship defined by the Dial;
in response to a determination that said Dial has an associated mapping function, accessing said mapping function by reference to said configuration database to apply said mapping function to the value derived from said input value to obtain a transformed value, wherein said mapping function is one of a set of transformations consisting of a mathematical transformation, a logical transformation, a shift and generation of a pseudo-random value; and
utilizing said transformed value to set said configuration latch.
2. The method of claim 1 , wherein said Dial has a mapping table defining said relationship between each of said plurality of Dial input values and said plurality of different Dial output values, wherein said step of deriving comprises obtaining said value derived from said Dial input value by reference to said mapping table of said Dial.