Central processing unit with integrated graphics functions

Details Central processing unit with integrated graphics functions Central processing unit with integrated graphics functions

1996-04-19

1999-08-03

Tung, Kee M.

Computer graphics processing and selective visual display system

Computer graphic processing system

Integrated circuit

345508, 345523, 395565, G09G 500

Patent

active

059331577

ABSTRACT:
The integer execution unit (IEU) of a central processing unit (CPU) is provided with a graphics status register (GSR) for storing a graphics data scaling factor and a graphics data alignment address offset. Additionally, the CPU is provided with a graphics execution unit (GRU) for executing a number of graphics operations in accordance to the graphics data scaling factor and alignment address offset, the graphics data having a number of graphics data formats. In one embodiment, the GRU is also used to execute a number of graphics data addition, subtraction, rounding, expansion, merge, alignment, multiplication, logical, compare, and pixel distance operations. The graphics data operations are categorized into a first and a second category, and the GRU concurrently executes one graphics operations from each category. Furthermore, under this embodiment, the IEU is also used to execute a number of graphics data edge handling and 3-D array addressing operations, while the load and store unit (LSU) of the CPU is also used to execute a number of graphics data load and store operations, including conditional store operations.

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Robert Tobias, "The LR33020 GraphX Processor: A Single Chip X-Terminal Controller," LSI Logic Corporation, IEEE, Feb. 24, 1992, p. 358 to p. 363.
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