Electrical computers and digital processing systems: processing – Byte-word rearranging – bit-field insertion or extraction,...
Reexamination Certificate
2004-10-01
2008-01-01
Treat, William M. (Department: 2181)
Electrical computers and digital processing systems: processing
Byte-word rearranging, bit-field insertion or extraction,...
Reexamination Certificate
active
07315937
ABSTRACT:
A method of extracting bits of a bit stream including retrieving bits from the bit stream into an accumulator, specifying a size value specifying a number of bits to extract, storing a position value into a control register, and executing a bit extraction instruction. The bit extraction instruction includes copying the size value number of bits from the accumulator beginning at the position value into a target register, setting any remaining bits of the target register to zero, and decrementing the position value by an amount based on the size value. The method may include loading bits from a bit stream into a register and moving the contents of the register into the accumulator to replenish the accumulator. The method may include determining, based on the position value, whether the accumulator needs to be replenished, and if not, branching to bypass replenishing functions.
REFERENCES:
patent: 5357620 (1994-10-01), Suzuki
patent: 5535412 (1996-07-01), Nadehara
patent: 5623621 (1997-04-01), Garde
patent: 6760837 (2004-07-01), Laurenti et al.
patent: 6782447 (2004-08-01), Ostler et al.
patent: 2002/0053015 (2002-05-01), Tan et al.
patent: 2002/0116602 (2002-08-01), Kissell et al.
patent: 2003/0120904 (2003-06-01), Sudharsanan et al.
patent: 2005/0108312 (2005-05-01), Chen et al.
patent: 2005/0166036 (2005-07-01), Catherwood et al.
patent: 0992880 (2000-04-01), None
patent: 1039370 (2000-09-01), None
patent: WO 0144921 (2001-06-01), None
James Ross Goodman: “Energy Scalable Reconfigurable Cryptographic Hardware for Portable Applications.” pp. 141, 142 & 147. Aug. 2000.
LEXRA LX5280 Data Sheet; Lexra, Inc., Release 1.9; Apr. 30, 2001. Introduction, Chapters 2 and 5.
LEXTR LX5380 Delta Data Sheet; Lexra, Inc., Revision 1.1. (DRAFT), Nov. 16, 2001; Appendix A, p. A.1, A.2, and A.5.
Jones Darren M.
Kinter Ryan C.
Shenhav Rivka
Thekkath Radhika
Huffman James W.
MIPS Technologies Inc.
Stanford Gary R.
Treat William M.
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