Address generation unit with segmented addresses in a mircroproc

Details Address generation unit with segmented addresses in a mircroproc Address generation unit with segmented addresses in a mircroproc

1994-01-04

1996-12-31

Moore, David K.

395403, G06F 1200

Patent

active

055902979

ABSTRACT:
A microprocessor comprising an execution unit for performing arithmetic functions, a fetch unit for determining which entry is to be accessed, an issue unit for accessing the entry from storage in a memory, and an address generation unit for generating an address for that entry. Portions of the base and limit values used for generating the address are stored in separate segments. These separate portions are rearranged so as to form a segment having contiguous base and limit bits. The contiguous base and limit values are then stored in a register file. Copies of the base and limit are stored in control registers and broadcast to other units. Furthermore, a resettable null bit is stored in another register. In addition, the AGU includes a means for selecting a particular field of the register file and performing read/write operations on the selected file.

REFERENCES:
patent: 4597044 (1986-06-01), Circello
patent: 4779187 (1988-10-01), Letwin
patent: 4825358 (1989-04-01), Letwin
patent: 5144551 (1992-09-01), Cepulis
patent: 5173872 (1992-12-01), Crawford et al.
patent: 5255379 (1993-10-01), Melo
patent: 5274834 (1993-12-01), Kardach et al.
patent: 5303378 (1994-04-01), Cohen
patent: 5321836 (1994-06-01), Crawford et al.
patent: 5418956 (1995-05-01), Willman
Intel 386 DX Microprocessor Programmer's Reference Manual, 1990, pp. 5-1 through 5-25.
"Superscalar Microprocessor Design" by Mike Johnson, Advanced Micro Devices, Prentice Hall, 1991.
"The Metaflow Architecture", pp. 10-13 and 63-73, by Val Popescu, Merle Schultz, John Spracklen, Gary Gibson, Bruce Lightner, and David Isaman, IEEE Micro, 1991.

Affiliated with

Also associated with

Rating

Address generation unit with segmented addresses in a mircroproc does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Address generation unit with segmented addresses in a mircroproc, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Address generation unit with segmented addresses in a mircroproc will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1149200