Operand size mechanism for control simplification

Details Operand size mechanism for control simplification Operand size mechanism for control simplification

1985-06-27

1987-03-10

Zache, Raulfe B.

Boots, shoes, and leggings

G06F 934

Patent

active

046494774

ABSTRACT:
A data processor having size selector in a controller for explicitly selecting the size of an operand independent of an instruction in an instruction register, together with means for selectively enabling the instruction register or other functional block, or a size selector to select the size of the operand. A size bus and a size multiplexer are also provided to route the size instructions. By using this size mechanism, the amount of sequencing and control logic is significantly reduced from prior data processors. The mechanism allows operations of different sizes to be performed during a single instruction while allowing instruction dependent sizing to be done residually.

REFERENCES:
patent: 4566063 (1986-01-01), Zolnowsky et al.

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