SIMD TCP/UDP checksumming in a CPU

Details SIMD TCP/UDP checksumming in a CPU SIMD TCP/UDP checksumming in a CPU

1997-06-23

1999-09-14

Ngo, Chuong Dinh

Boots, shoes, and leggings

364788, 371 53, G06F 1100, G06F 1110, G06F 750

Patent

active

059532408

ABSTRACT:
A CPU adapted to calculate a checksum simultaneously on multiple values packed into a single register. An adder is provided which adds a number of values packed into a first register to a number of packed values from a second register. The adder is constructed, or partitioned, so that the values do not propagate their carry bit to the next value. A special carry bit adder is provided which will add a carry bit out of each partitioned portion back into the sum value to generate the sum required by the checksum protocol.

REFERENCES:
patent: 5327369 (1994-07-01), Ashkenazi
Shipnes, "Graphic Processing with the 88110 RISC Microprocessor" IEEE, 1992, pp. 169-174.

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