General-Purpose Embedded Cores



The most successful programmable component on silicon is the microprocessor. Fueled by a well-balanced mix of efficient implementations, flexibility, and tool support, microprocessors have grown into a key component for electronic design. This chapter reviews the major features of microprocessor architectures, and in particular of RISC (Reduced Instruction Set Computer) processors. The topic of microprocessors is a very broad one; entire books are devoted to its discussion. The objectives of this chapter are more modest. Our objective is to get insight into the relation between a C program and the execution of that C program on a microprocessor. This will help us to understand the cost of the C program in terms of memory footprint and execution time. Later chapters build on this insight to discuss the detailed interaction of C programs with custom-hardware modules. The chapter covers four different aspects of C program execution on RISC processors. First, we will discuss the major architecture elements of a RISC processor and their role in C program execution. Second, we will discuss the path from C programs to assembly programs to machine instructions. Third, we will discuss the runtime organization of a C program at the level of the machine. And finally, we will discuss techniques to evaluate the quality of generated assembly code, and thus evaluate the quality of the C compiler. Much more can be said on microprocessors besides these points; the reader can find additional suggestions in the Further Reading section at the end of this chapter.


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Copyright information

© Springer Science+Business Media, LLC 2010

Authors and Affiliations

  1. 1.Bradley Dept. Electrical & Computer EngineeringVirginia TechBlacksburgUSA

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