Method and apparatus for decoding enhancement instructions using

Details Method and apparatus for decoding enhancement instructions using Method and apparatus for decoding enhancement instructions using

1997-03-31

1999-03-16

Ellis, Richard L.

395385, G06F 922

Patent

active

058840710

ABSTRACT:
A decoder circuit decodes a macro-instruction by selecting an alias encoding from the data size encodings in the micro-instruction. The decoder comprises a type detector to determine the macro-instruction type, an extraction circuit for extracting the encoding of the non-multimedia enhancement instructions, a matching circuit for matching the macro-opcode with the opcodes of the multimedia enhancement instructions, and a selecting circuit to select the alias encoding for the micro-instruction. The decoder expands the scope of the data size field to accommodate additional multimedia enhancement instructions without significant change in hardware.

REFERENCES:
patent: 3889242 (1975-06-01), Malmer, Jr.
patent: 4130869 (1978-12-01), Kinoshita et al.
patent: 4159519 (1979-06-01), Gupta
patent: 4825363 (1989-04-01), Baumann et al.
patent: 5222244 (1993-06-01), Carbine et al.

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