Computer with automatic mapping of memory contents into machine

Details Computer with automatic mapping of memory contents into machine Computer with automatic mapping of memory contents into machine

1989-07-19

1991-08-27

Heckler, Thomas M.

Boots, shoes, and leggings

3642477, 36424341, 3642592, G06F 1208

Patent

active

050438700

ABSTRACT:
A computer system arranged for faster processing operations by providing a stack cache in internal register memory. A full stack is provided in main memory. The stack cache provides a cache representation of part of the main memory stack. Stack relative addresses contained in procedure instructions are converted to absolute main memory stack addresses. A subset of the absolute main memory stack address is used to directly address the stack cache when a "hit" is detected. Otherwise, the main memory stack is addressed. The stack cache is implemented as a set of contiguously addressable registers. Two stack pointers are used to implement allocation space in the stack as a circulating buffer. Cache hits are detected by comparing the absolute stack address to the contents of the two circular buffer pointers. Space for a procedure is allocated upon entering a procedure. The amount of space to allocate is stored in the first instruction. Space is deallocated when a procedure is terminated. The deallocation space is stored in the first instruction executed after procedure termination.

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patent: 4761733 (1988-08-01), McCrocklin et al.
patent: 4811208 (1989-03-01), Myers et al.
Aho et al., "Principles of Compiler Design", Addison-Wesley Publ. Co., 1977, pp. 44, 45, 64-68, 254-258, 350-363.
McGlynn, "Microprocessors Technology, Architecture, and Applications", John Wiley & Sons, 1976, pp. 5-12.

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