G - Physics – 06 – F
Patent
G - Physics
06
F
354/230
G06F 9/30 (2006.01) G06F 9/38 (2006.01)
Patent
CA 2008238
MULTIPLE INSTRUCTION PREPROCESSING SYSTEM WITH DATA DEPENDENCY RESOLUTION ABSTRACT A method is provided for preprocessing multiple instructions prior to execution of such instructions in a digital computer having an instruction decoder, an instruction execution unit, and multiple general purpose registers which are read to produce memory addresses during the preprocessing. The method comprises: (1) avoiding the preprocessing of a current instruction to read a general purpose register to produce a memory address prior to the modification of the contents of that register by a preceding instruction by (a) generating a composite write mask having a bit set for each general purpose register whose contents are to be modified by at least one of a plurality of decoded but not-yet-executed instructions preceding the current instruction, and (b) stalling the preprocessing of the current instruction when a general purpose register to be read by the current instruction is a register having a bit set in the write mask, and/or (2) avoiding the preprocessing of a current instruction which modifies the contents of a general purpose register that is to be read by a preceding instruction by (a) generating a composite read mask having a bit set for each general purpose register to be read by at least one of a plurality of decoded but not-yet-executed instructions preceding the current instruction, and (b) stalling the preprocessing of the current instruction when a general purpose register whose contents are to be modified by the current instruction is a register having a bit set in the read mask. PD88-0257 U.S.: DIGM:011 FOREIGN: DIGM:042
Firstenberg Mark A.
Fite David B.
Fossum Tryggve
Grundmann William R.
Hetherington Ricky C.
Digital Equipment Corporation
Firstenberg Mark A.
Fite David B.
Fossum Tryggve
Grundmann William R.
LandOfFree
Multiple instruction preprocessing system with data... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Multiple instruction preprocessing system with data..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multiple instruction preprocessing system with data... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1693208