Operand multiplexor control modifier instruction in a fine...

Details Operand multiplexor control modifier instruction in a fine... Operand multiplexor control modifier instruction in a fine...

2011-01-11

2011-01-11

Tung, Kee M (Department: 2628)

Computer graphics processing and selective visual display system

Computer graphic processing system

Graphic command processing

C345S418000, C345S501000, C345S502000, C345S503000, C345S504000, C345S505000, C345S506000

Reexamination Certificate

active

07868894

ABSTRACT:
The present invention is generally related to the field of image processing, and more specifically to an instruction set for processing images. Vector processing may involve rearranging vector operands in one or more source registers prior to performing vector operations. Typically, rearranging of operands in source registers is done by issuing a plurality of permute instructions that require excessive usage of temporary registers. Furthermore, the permute instructions may cause dependencies between instructions executing in a pipeline, thereby adversely affecting performance. Embodiments of the invention provide a level of muxing between a register file and a vector unit that allow for rearrangement of vector operands in source registers prior to providing the operands to the vector unit, thereby obviating the need for permute instructions.

REFERENCES:
patent: 6009516 (1999-12-01), Steiss et al.
patent: 6141673 (2000-10-01), Thayer et al.
patent: 2001/0010604 (2001-08-01), Esumi
Title: Group 2: SMIPS Multimedia Extensions, Author: King et al., Date: May 2006, pp. 1-21, Source: http://csg.csail.mit.edu/6.375/6—375—2010—www/projects.html.

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