Microprocessor apparatus and method for performing block cipher cryptographic functions
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United States of America Patent
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Nov 30, 2010
Issued Date -
N/A
app pub date -
Dec 5, 2003
filing date -
Apr 18, 2003
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Abstract
A microprocessor apparatus is provided, for performing a cryptographic operation. The microprocessor apparatus includes an x86-compatible microprocessor that has fetch logic, a cryptography unit, and an integer unit. The fetch logic is configured to fetch an application program from memory for execution by the x86-compatible microprocessor. The application program includes an atomic instruction that directs the x86-compatible microprocessor to perform the cryptographic operation. The atomic instruction has and opcode field and a repeat prefix field. The opcode field prescribes that the device accomplish the cryptographic operation as further specified within a control word stored in a memory. The repeat prefix field is coupled to the opcode field. The repeat prefix field indicates that the cryptographic operation prescribed by the atomic instruction is to be accomplished on a plurality of blocks of input data.
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