The auto increment mode is very similar to the register indirect mode. The only exception is that the register is incremented before (or after) we use its value to access memory. When the address that is stored in the register is defining a data table in memory, it is crucial to increment the register after accessing the table every time. It can be obtained using the increment instruction.
In this article, we will take a look at the Auto Increment Addressing Mode according to the GATE Syllabus for CSE (Computer Science Engineering). Read ahead to learn more.
Auto Increment Addressing Mode
The auto increment addressing mode is just the opposite of the auto decrement mode. In the case of auto increment mode, the content present in the register is initially incremented, and then the content that is incremented in the register is used in the form of an effective address. Once the content present in the register in the auto-increment addressing mode is accessed by its instruction, the content of the register is incremented to refer to the next operand.
Symbolically, we can represent it as follows:
(R)+
The effective address here is the content of the register since it is enclosed using parentheses. The content of the register that refers to a memory location gets incremented so that it can point to the next memory location in which the next operand gets stored. The auto increment mode thus helps us in implementing the stack structure.
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