  ASIPs are designed in order to execute instructions of a particular domain of
applications. The designing of ASIPs addresses the major challenges faced by a
system on chip such as size, cost, performance and energy consumption. The
higher the number of similar instructions within the domain to be mapped the
lesser the energy consumption, the smaller the size and the higher the
performance of the ASIP. Thus, designing processors for domains with more
similar programs would overcome these issues. This paper describes the
investigation of whether the domains of programmer specific programs have any
significance like application specific program domains and thus, whether the
approach of designing processors known as Programmer Specific Instruction Set
Processors is worthwhile. We performed the evaluation at the instruction level
by using four different measures to obtain the similarity of programs: (1) by
the existence of each instruction, (2) by the frequency of each instruction,
(3) by two consecutive instruction patterns and (4) by three consecutive
instruction patterns of application specific and programmer specific programs.
We found that although programmer specific instructions show some impact on the
similarity measures, they are much smaller and therefore insignificant compared
to the impact from application specific programs.
