Subroutine return prediction mechanism using ring buffer and com

Details Subroutine return prediction mechanism using ring buffer and com Subroutine return prediction mechanism using ring buffer and com

1989-12-18

1993-01-12

Lee, Thomas C.

Boots, shoes, and leggings

3642388, 364DIG1, 3642318, 3642613, G06F 940, G06F 942

Patent

active

051796732

ABSTRACT:
A method and arrangement for producing a predicted subroutine return address in response to entry of a subroutine return instruction in a computer pipeline that has a ring pointer counter and a ring buffer coupled to the ring pointer counter. The ring pointer counter contains a ring pointer that is changed when either a subroutine call instruction or return instruction enters the computer pipeline. The ring buffer has buffer locations which store a value present at its input into the buffer location pointed to by the ring pointer when a subroutine call instruction enters the pipeline. The ring buffer provides a value from the buffer location pointed to by the ring pointer when a subroutine return instruction enters the computer pipeline, this provided value being the predicted subroutine return address.

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