Shanghai Zhaoxin Semiconductor Co., Ltd.

Via Alliance Semiconductor Co., Ltd.

Penghao Zou

Zhi Zhang

Jianbin Wang

Mengchen Yang

Xin Gao

Xin-Yu Gao

Xiaoyuan Yu

Meng-Chen Yang

Chen-Chen Song

Kang-Kang Zhang

An instruction execution method suitable for being executed by a processor is provided. The first processor comprises a register alias table (RAT) and a reservation station. The instruction execution method includes: a register alias table receives a first micro-instruction and a second micro-instruction and issues the first micro-instruction and the second micro-instruction to the reservation station; and the reservation station assigns one of a plurality of execution units to execute the first micro-instruction, according to the first specific message of the first micro-instruction; and the reservation station assigns one of the execution units to execute the second micro-instruction, according to the second specific message of the second micro-instruction. When the reservation station determines that the execution units assigned for the first micro-instruction and the second micro-instruction are the same, the reservation station indicates that the second micro-instruction depends on the first micro-instruction.

Instruction execution method and instruction execution device

An instruction execution method includes the following steps: translating a macro-instruction into a first micro-instruction and a second micro-instruction, and marking first binding information on the first micro-instruction, and marking second binding information on the second micro-instruction; and simultaneously retiring the first micro-instruction and the second micro-instruction according to the first binding information and the second binding information. The first micro-instruction and the second micro-instruction are adjacent to one another in the micro-instruction storage space.

An instruction execution device includes a processor. The processor includes an instruction translator, a reorder buffer, an architecture register, and an execution unit. The instruction translator receives a macro-instruction and translates the macro-instruction into a first micro-instruction, a second micro-instruction and a third micro-instruction. The instruction translator marks the first micro-instruction and the second micro-instruction with the same atomic operation flag. The execution unit executes the first micro-instruction to generate a first execution result and to store the first execution result in a temporary register. The execution unit executes the second micro-instruction to generate a second execution result and to store the second execution result in the architecture register. The execution unit executes the third micro-instruction to read the first execution result from the temporary register and to store the first execution result in the architecture register.

A reissue instruction parking system for a microprocessor including a reservation stations module that dispatches instructions for execution and a reorder buffer that reissues instructions to the reservation stations module during a reissue state, in which the reissue instruction parking system includes at least one first pipeline stage and at least one second pipeline stage, in which the first pipeline stages provide a first reissue instruction from a reissue data path to the reservation stations module during the reissue state and that parks the first reissue instruction once the reservation stations module is determined to be full, and in which the second pipeline stages select a pointer to the reorder buffer which provides a corresponding first reissue instruction onto the reissue data path, in which the second pipeline stages are placed into a hold state when a second full signal is asserted.

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Beijing, China

Penghao Zou