MIPS-Core Application Specific Instruction-Set Processor ...
The MIPS Processor Computer Organization The MIPS Processor Appendix A.
10
The MIPS Processor Computer Organization The MIPS Processor Appendix A
-
Upload
florence-henry -
Category
Documents
-
view
223 -
download
5
Transcript of The MIPS Processor Computer Organization The MIPS Processor Appendix A.
The MIPS Processor Computer Organization
The MIPS Processor
Appendix A
The MIPS Processor Computer Organization
Assembly Language
Symbolic representation of a computer's machine language. more readable than machine language each processor has its own assembly language no two assembly languages are the same.
The MIPS Processor Computer Organization
Why Use Assembly Language
Primary reason: for speed or size of a critical application
compiler may not produce the best instructions have better control over which instructions are used
Example: embedded systems or devices
The MIPS Processor Computer Organization
Drawbacks of Assembly Language
Are not widely used by everyday programmers programs are machine dependent programs are longer than those in a high-level language programs have no structure; hard to read
The MIPS Processor Computer Organization
The Assembler
Translates assembly language instructions into machine language instructions
The MIPS Processor Computer Organization
Translation
Symbols can be used before they are defined. A two step translation is required:
resolve labels (find memory locations) translate assembly instructions
The MIPS Processor Computer Organization
Sample Program # # Prints all primes in the numbers 1 - 100 # .text
main:
li $t0, 1 WHILE: bgt $t0, 100, WHILE_END
move $a0, $t0 jal TEST_PRIME beqz $v0, INC1
la $a0, Message move $a1, $t0, jal PRINTF INC1: addi $t0, $t0, 1 j WHILE WHILE_END:
li $v0, 10 syscall
###################################
.data
Message: .asciiz "This number is prime: " NEWLINE: .asciiz "\n"
The MIPS Processor Computer Organization
Object File
object code - machine instructions, data, and bookkeeping info. can not be executed directly it may refer to routines in other object files
Six distinct sections on Unix systems:
The MIPS Processor Computer Organization
The Linker
linker - combines a collection of object files into an executable file. programs can be split into smaller pieces (files) each file contains logically related routines and data
The MIPS Processor Computer Organization
The Loader
loader - used to load a program into memory sets the registers initializes the program counter
For the MIPS processor:
