An execution unit is provided for executing a first instruction which includes an opcode field, a first operand field, and a second operand field. The execution unit includes a first input register for receiving a first operand specified by a value of the first operand field, and a second input register...http://www.google.com/patents/US6557098?utm_source=gb-gplus-sharePatent US6557098 - Microprocessor including an efficient implementation of extreme value instructions
