Addressing mode and/or instruction for providing sine and...

Details Addressing mode and/or instruction for providing sine and... Addressing mode and/or instruction for providing sine and...

2007-08-21

2007-08-21

Malzahn, D. H. (Department: 2193)

Electrical computers: arithmetic processing and calculating

Electrical digital calculating computer

Particular function performed

Reexamination Certificate

active

10107262

ABSTRACT:
The present invention relates to a method and system for providing sine and cosine value pairs in a processor. The method includes decoding a sine and cosine instruction having a predetermined source angle and generating an index value for a sine cosine table (SCT) using a sine cosine control register (SCCR). The method also includes generating a plurality of quadrant bits using the SCCR, reading a sine and a cosine value pair from the SCT using the index value, and adjusting a sign of each value of the sine and the cosine value pair using the plurality of quadrant bits, if necessary. The method further includes incrementing the SCCR, if the SCCR is to be incremented, executing the sine and cosine instruction using the sine and cosine value pair, and outputting at least one result.

REFERENCES:
patent: 5467294 (1995-11-01), Hu et al.
patent: 5737253 (1998-04-01), Madisetti et al.
patent: 5774082 (1998-06-01), Chu et al.
patent: RE36388 (1999-11-01), Fox et al.
patent: 6330578 (2001-12-01), Savin et al.

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