为了协助微处理器处理浮点数据，Intel公司设计有数学协处理器，后被称为浮点处理单元（Floating-Point Unit，FPU）。配合8086和8088的是8087，配合80286的是80287，配合80386的是80387。
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...EPIC: Explicitly Parallel Instruction Computing(明晰平行指令计算),是一 FPU: Floating-point Processing Unit(浮点处理单元) FRC: Functional Redundancy Checking (冗余功用检查,双处理器才有这项特性) ..
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通常，不同的中央处理单元 (CPU) 和操作环境以不同的方式存储浮点数，简单地比较期望值和实际值是无效的。
Typically, different central processing units (CPUs) and operating environments store floating points differently and simple comparisons between expected and actual values don't work.
处理器将数据流解释为要执行的指令，它拥有一个或多个处理单元，用于执行整数和浮点运算以及更高级的计算。
A processor interprets a stream of data as instructions to execute; it has one or more processing units that perform integer and floating-point arithmetic as well as more advanced computations.
在硬件级别中，物理处理器是作为不同的执行单元进行组织的，例如定点和浮点操作单元。
A physical processor is organized as different execution units at the hardware level, for example, fixed point and floating point operation units.
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