CPU with DSP function preprocessor having pattern recognition de

Details CPU with DSP function preprocessor having pattern recognition de CPU with DSP function preprocessor having pattern recognition de

1996-03-18

1998-05-19

An, Meng-Ai T.

395379, 395384, G06F 930, G06F 15163

Patent

active

057548781

ABSTRACT:
A CPU or microprocessor which includes a general purpose CPU, such as an X86 core, and a DSP. The CPU also includes an intelligent DSP function decoder or preprocessor which examines X86 opcode sequences and determines if a DSP function is being executed. The function preprocessor includes a pattern recognition detector which stores instruction sequences which implement DSP functions. The pattern recognition detector compares each pattern with an instruction sequence and determines if one of the patterns substantially matches the instruction sequence. If the DSP function preprocessor determines that a DSP function is being executed, the preprocessor converts or maps the opcodes to a DSP macro instruction that is provided to the DSP. The DSP executes one or more DSP instructions to implement the desired DSP function in response to the macro instruction. If the X86 opcodes in the instruction cache or instruction memory do not indicate or are not intended to perform a DSP-type function, the opcodes are provided to the X86 core as which occurs in current prior art computer systems. Thus, the DSP offloads these mathematical functions from the X86 core, thereby increasing system performance. The CPU of the present invention thus implements DSP functions more efficiently than X86 logic while requiring no additional X86 opcodes. The present invention also generates code that operates transparently on an X86 only CPU or a CPU according to the present invention which includes X86 and DSPs. Thus the present invention is backwards compatible with existing software.

REFERENCES:
patent: 4626989 (1986-12-01), Torii
patent: 4694420 (1987-09-01), Pettet et al.
patent: 5241636 (1993-08-01), Kohn
patent: 5574872 (1996-11-01), Rotem et al.
patent: 5588118 (1996-12-01), Mandava et al.
patent: 5594880 (1997-01-01), Moyer et al.
patent: 5619665 (1997-04-01), Emma
patent: 5649138 (1997-07-01), Ireton
MC88110 Second Generation RISC Microprocessor User's Manual, 1991 Motorola.
Neal Margulis, "i860 Microprocessor Architecture"; Intel Osborne McGraw-Hill, 1990.
Halfhill, T. R. "AMD K6 Takes on Intel P6", vol. 21. No. 1, Jan. 1, 1996 pp. 67-68, 70 & 72.
International Search Report for PCT/US 96/19586 dated Apr. 28, 1997.

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