Difference between revisions of "Stack"
Chris Tyler (talk | contribs) (Created page with 'Category:Computer Architecture A ''stack'' is an array where values are added (pushed) or removed (pulled) to/from the end of the array only. Most CPU designs incorporate one…') |
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Hardware stacks are implemented through the use of a [[Register#Stack Pointer|stack pointer]] register, which is used for indirect read/writes, with the stack pointer automatically incremented or decremented on each access. On some architectures, the stack grows downward in memory; in others, it grows upward. | Hardware stacks are implemented through the use of a [[Register#Stack Pointer|stack pointer]] register, which is used for indirect read/writes, with the stack pointer automatically incremented or decremented on each access. On some architectures, the stack grows downward in memory; in others, it grows upward. | ||
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| + | In a few historical cases (e.g., old Intel 4004 and 8008 processors) the stack was implemented in registers internal to the CPU rather than in general address space. | ||
Revision as of 22:33, 26 November 2016
A stack is an array where values are added (pushed) or removed (pulled) to/from the end of the array only. Most CPU designs incorporate one or more hardware-managed stacks which are used to store and restore state information during subroutine calls, exceptions, and interrupts.
Hardware stacks are implemented through the use of a stack pointer register, which is used for indirect read/writes, with the stack pointer automatically incremented or decremented on each access. On some architectures, the stack grows downward in memory; in others, it grows upward.
In a few historical cases (e.g., old Intel 4004 and 8008 processors) the stack was implemented in registers internal to the CPU rather than in general address space.
