noun
floating-point arithmetic unit
A hardware component or functional unit that performs floating-point calculations; used in computer architecture contexts.
このCPUは浮動小数点演算機構を内蔵している。
This CPU has a built-in floating-point arithmetic unit.
Compound of 浮動小数点 (floating-point) + 演算機構 (arithmetic unit). A straightforward technical term without known historical irregularities.