Conditional execution in assembly language is implemented through jump instructions, which can alter the program’s execution flow based on specific conditions. Conditional execution is fundamental to program control flow. Overview of Conditional Execution Two Types of Conditional Execution: Unconditional Jump – Uses the JMP instruction to always jump Conditional Jump – Decides whether to jump … Read more
Principle of Limitations on Jump Instructions In 8086 assembly language, displacement-based jump instructions (such as <span>jmp short</span>, <span>jmp near ptr</span>, <span>jcxz</span>, <span>loop</span>, etc.) share a common characteristic: their jump range is limited by the displacement value. This limitation arises because the machine code for these instructions contains only a one-byte or two-byte displacement, rather than … Read more
The Mechanism of Displacement in Jump Instructions In 8086 assembly language, various jump instructions use relative displacement instead of absolute addresses to achieve jumps, providing great flexibility for the program’s memory layout. Core Principle The machine code of jump instructions contains the offset of the target address from the current instruction position, rather than the … Read more