Piplined system includes a selector for loading condition code e

Details Piplined system includes a selector for loading condition code e Piplined system includes a selector for loading condition code e

1991-09-27

1993-03-09

Lee, Thomas C.

Boots, shoes, and leggings

364DIG1, 364247, 3642473, 3642318, 364238, 395800, G06F 938

Patent

active

051931575

ABSTRACT:
A method and apparatus is disclosed for control of a central processor in response to a branch instruction using two separate, subsequently updated condition codes. Computer architecture is provided wherein the condition codes which determine the processor state result from the execution of instructions prior to the currently executing instruction. When the preceding instructions are executed, condition codes are set and maintained in a first condition code register. The first condition code is transferred to the second condition code register, and the first condition code register is updated to reflect the result of the current instruction execution. Any condition code state such as a branch used by the third instruction is based on the condition code state maintained in the second condition code register.

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