| 摘要 |
A pair of inherently sequential instructions, having an instruction dependency of the type in which the subsequent instruction requires as an input operand the result of the earlier instruction execution, can nevertheless be simultaneously executed by two data flow facilities (primary and secondary) under control of a control unit, without the requirement that both data flow facilities be fully equipped for all instructions. …<??>The secondary data flow facility of this invention is generally less massive and less sophisticated than the primary data flow facility but is more sophisticated in a critical organ, the adder. The adder in the secondary data flow facility has one additional operand capability. The three-input adder of the secondary data flow facility thus is capable of replicating internally a result of the two-input adder of the primary data flow facility. Using this replicated primary adder "result", together with the additional operand capability, the secondary data flow facility three- input adder executes the dependent subsequent instruction of the pair simultaneously with the earlier instruction execution by the primary data flow facility. |
