Pipeline circuit and pipeline operating method

A pipeline circuit, comprising:

• a plurality of multiplier-accumulators, configured to receive a plurality of input signals, and perform summation of the plurality of input signals to generate a computation result;
• a plurality of pre-stage gating circuits, wherein the computation results of the plurality of multiplier-accumulators is input to a corresponding pre-stage gating circuit;
• a plurality of select circuits, each of the plurality of select circuits being coupled to a corresponding pre-stage gating circuit and the corresponding multiplier-accumulator,
• wherein, an output end of the multiplier-accumulator is coupled to a first input end of the respective pre-stage gating circuit and a first input end of the respective select circuit, a second input end of the select circuit is coupled to an output end of the respective one of the plurality of pre-stage gating circuits;
• an adder, in which an input of the adder is coupled to the outputs of the plurality of select circuits;
• a gating circuit, coupled to an output of the adder, and output an output signal at an output end,
• wherein in a first mode, the gating circuit receives a signal corresponding to the computation result that has been gated by the plurality of pre-stage gating circuits to output as the output signal;
• and
• wherein in a second mode, the gating circuit receives a signal corresponding to the computation result that bypasses the plurality of pre-stage gating circuits to output as the output signal.