Method and apparatus for signed and unsigned bounds check

Details Method and apparatus for signed and unsigned bounds check Method and apparatus for signed and unsigned bounds check

G - Physics

06

F

354/230

G06F 9/30 (2006.01) G06F 7/02 (2006.01)

Patent

CA 1222323

METHOD AND APPARATUS FOR SIGNED AND UNSIGNED BOUNDS CHECK Abstract A typical feature of a data processor is a bounds check. A bounds check is achieved when a determination is made as to whether a check value, typically an address or datum, is within predetermined bounds. Such check values may be signed or unsigned. By requiring that the upper bound be numerically larger than the lower bound for doing a signed check, and requiring that the upper bound be logically larger than the lower bound for doing an unsigned check, the bounds check is performed by the data processor without the need of receiving a signal which informs the data processor in advance as to whether the check is to be signed or unsigned.

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