Processing unit incorporating instruction-based persistent...

Details Processing unit incorporating instruction-based persistent... Processing unit incorporating instruction-based persistent...

2011-03-08

2011-03-08

Chan, Eddie P (Department: 2183)

Electrical computers and digital processing systems: processing

Processing control

Arithmetic operation instruction processing

C712S300000

Reexamination Certificate

active

07904699

ABSTRACT:
Persistent vector multiplexer control is used in a vector-based execution unit to control the shuffling of words in operand vectors processed by the execution unit. In addition, a persistent swizzle instruction is defined in an instruction set for the vector-based execution unit and is used to cause state information to be persisted such that the operand vectors processed by subsequent vector instructions executed by the vector-based execution unit will be selectively shuffled using the persisted state information. As a result, when multiple vector instructions require a common custom word ordering for one or more operand vectors, a single persistent swizzle instruction may be used to select the desired custom word ordering for all of the vector instructions.

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