Chapter 4 Optimization
44 Purpose of This Chapter
4.1 Purpose of This Chapter
The assembler and linker examine source statements containing conditional branches, unconditional
branches, subroutine calls, data transfer instructions, arithmetic instructions, logical instructions, bit
manipulation instructions, and user-defined instructions to determine the shortest possible machine
language instruction corresponding to the instruction.
This chapter uses examples to explain what optimization is.
NOTE: The assembler and linker make changes to object code, not instruction
mnemonics. Pay close attention to this point when viewing list files. When an @
is displayed before a line number in the list file, it indicates that the statement
has been optimized.
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