Apparatus for detecting and executing traps in a superscalar pro

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

395733, G06F 1300

Patent

active

056921705

ABSTRACT:
Apparatus for detecting and executing trapping program instructions in a superscalar processor operating on a plurality of pipelined instructions includes a fetch stage for fetching consecutive instructions from an instruction cache or from main memory, an instruction FIFO memory for storing fetched instructions from the fetch stage, and an instruction decode stage for removing instructions from the FIFO memory in accordance with relative ages of instructions stored in the FIFO memory. The decode stage examines instructions removed from the FIFO memory for trapping conditions, and flushes all younger instructions from the FIFO memory in response to identification of a trap in an instruction. The decode stage distinguishes between hardware traps and software traps. A software trapping instruction is forwarded to an execute stage for execution. The decode stage immediately causes the fetch address to be changed to the appropriate trap handler address.

REFERENCES:
patent: 4179737 (1979-12-01), Kim
patent: 4912635 (1990-03-01), Nishimukai et al.
patent: 5136696 (1992-08-01), Beckwith et al.
patent: 5327567 (1994-07-01), Johnson
patent: 5394529 (1995-02-01), Brown et al.
patent: 5442756 (1995-08-01), Grochowski et al.
patent: 5448705 (1995-09-01), Nguyen et al.
C. Melear, "The design of the 88000 RISC family," IEEE Micro.,9(2) :26-38 (Apr. 1, 1989).
J. Smith et al., "Implementing precise interrupts in pipelined processors," IEEE Transactions on Computers,37(5) :562-573 (May 5, 1988).

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Apparatus for detecting and executing traps in a superscalar pro does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Apparatus for detecting and executing traps in a superscalar pro, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for detecting and executing traps in a superscalar pro will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-2115902

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.