| 摘要 |
Different instruction sets are provided for different units of execution such as threads, processes, and execution contexts. Execution units may be associated with instruction sets. The instruction sets may have mutually exclusive opcodes, meaning an opcode in one instruction set is not included in any other instruction set. When executing a given execution unit, the processor only allows execution of instructions in the instruction set that corresponds to the current execution unit. A failure occurs if the execution unit attempts to directly execute an instruction in another instruction set.
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