| 摘要 |
A processor includes n-bit (e.g., 128-bit) register circuitry for holding instruction operands. Instruction decode circuitry decodes processor instructions from an instruction stream. Arithmetic logic (AL) circuitry is operable to perform one of a single operation on at least one m-bit maximum (e.g., 64-bit) operand provided from the n-bit register circuitry, responsive to a first single processor instruction decoded by the instruction decode circuitry, wherein m<n. In addition, the AL circuitry is operable to perform multiple parallel operations on at least two portions of one n-bit operand provided from the n-bit register circuitry. The multiple parallel operations are performed responsive to a second single instruction decoded by the instruction decode circuitry.
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