7.1. Memory Stacks
Operating systems establish at least one stack in memory to support standard operations such as input and output. Most instruction sets and programming environments permit a programmer to establish other stacks in memory.
7.1.1. Stack Addressing for CISC Architectures
Many CISC architectures support auto-indexed addressing modes that make possible a very easy and fully general method for “pushing” and “popping” individual items onto and then off a stack. Items on a stack are accessed with a stack pointer (SP), which may be either purpose-built or a general register.
Two conventions exist for organizing a stack. In one, autoincrementing of the stack pointer is associated with pushing, and autodecrementing with popping. With ...
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