Patent
1995-12-27
1998-07-07
Donaghue, Larry D.
395386, 395388, 395380, G06F 1204
Patent
active
057782466
ABSTRACT:
A method and apparatus for efficient propagation of attribute bits in an instruction decoding pipeline. Attribute bits associated with instructions are manipulated in a like manner to the instructions in an instruction decode pipeline. The pipeline has three pipe stages. Some of the attribute bits are generated in the first pipe stage but not used until the third pipe stage. A prefetch buffer stores prefetched instruction bytes. Attribute bits for each prefetched instruction byte are generated and stored in an attribute buffer in locations corresponding to the instruction bytes stored in the prefetch buffer. A code rotator selects two sequential instructions from the prefetch buffer and stores them in an instruction FIFO for later decoding and execution in the pipeline. In like manner and in parallel, an attribute rotator selects two sets of attribute bits corresponding to the selected instructions and stores them in the instruction FIFO. The attribute bits control certain operations in the decoding and execution of the selected instructions.
REFERENCES:
patent: 5438668 (1995-08-01), Coon et al.
patent: 5586277 (1996-12-01), Brown et al.
patent: 5600806 (1997-02-01), Brown et al.
patent: 5630083 (1997-05-01), Carbine et al.
patent: 5655098 (1997-08-01), Witt et al.
Donaghue Larry D.
Intel Corporation
LandOfFree
Method and apparatus for efficient propagation of attribute bits does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for efficient propagation of attribute bits, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for efficient propagation of attribute bits will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1216952