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ASIMD multiply-accumulate instruction

Instruction GroupAArch64 Instructions

Exec Latency

Execution Throughput

Utilized Pipelines

ASIMD FP multiply accumulate, Q-form

VMLA,VMLS,VFMA,

9(4)

1F0/F1

ASIMD multiply-accumulate pipelines support late-forwarding of accumulate operands from similar μops, allowing a typical sequence of floating-point multiply-accumulate μops to issue one every four cycles

(accumulate latency shown in parentheses).

(1)、in above description, what is the meaning of "late-forwarding"?

(2)、whan is the meaning of "allowing a typical sequence of floating-point multiply-accumulate μops to issue one every four cycles"?

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