Extended control word decoding

Details Extended control word decoding Extended control word decoding

G - Physics

06

F

354/230.72

G06F 9/22 (2006.01)

Patent

CA 1182574

ABSTRACT Extended control word decode circuitry in- creases the number of simultaneous functions performed during execution of a control word in the central processing unit (CPU) of a computer system. A first field of a control word is decoded into 2n decodes for testing or specifying a first set of CPU conditions. A second field in the control word is decoded into 2m - X decodes for testing or specifying a second set of CPU conditions. The X decodes, which together with the 2n decodes of the first field test or specify multiples or pairs of a third set of CPU conditions and inhibit the 2n decodes from testing or specifying said first set of CPU conditions.

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