Processor Description Languages

4.4 Instruction-set Grammar 73

declaration of a parameter consists of an instantiation name and a reference to

some other rule or to a constant.The instantiation name will be used in the attributes

of theAND r ule (see in the following paragraphs). Again,the rules that are referenced

are either AND rules or OR rules.

This process of analyzing the instruction set can recursively be applied until

all entries of Table 4.1 are covered by grammar rules. It is important to note that

although the grammar structures the instruction set and introduces hierarchy in

the description, it does not contain any other information about the target proces-

sor. The execution ...