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- X87 abstract "x87 is a floating point-related subset of the x86 architecture instruction set. It originated as an extension of the 8086 instruction set in the form of optional floating point coprocessors that worked in tandem with corresponding x86 CPUs. These microchips had names ending in "87". This was also known as the NPX (Numeric Processor eXtension). Like other extensions to the basic instruction set, x87-instructions are not strictly needed to construct working programs, but provide hardware and microcode implementations of common numerical tasks, allowing these tasks to be performed much faster than corresponding machine code routines can. The x87 instruction set includes instructions for basic floating point operations such as addition, subtraction and comparison, but also for more complex numerical operations, such as the computation of the tangent function and its inverse, for example.Most x86 processors since the Intel 80486 have had these x87 instructions implemented in the main CPU but the term is sometimes still used to refer to that part of the instruction set. Before x87 instructions were standard in PCs, compilers or programmers had to use rather slow library calls to perform floating-point operations, a method that is still common in (low-cost) embedded systems.".
- X87 wikiPageExternalLink coproc.txt.
- X87 wikiPageExternalLink www.coprocessor.info.
- X87 wikiPageID "2532970".
- X87 wikiPageRevisionID "604545012".
- X87 hasPhotoCollection X87.
- X87 subject Category:Stack_machines.
- X87 subject Category:X86_architecture.
- X87 comment "x87 is a floating point-related subset of the x86 architecture instruction set. It originated as an extension of the 8086 instruction set in the form of optional floating point coprocessors that worked in tandem with corresponding x86 CPUs. These microchips had names ending in "87". This was also known as the NPX (Numeric Processor eXtension).".
- X87 label "Architettura x87".
- X87 label "X87".
- X87 label "X87".
- X87 label "X87".
- X87 label "X87".
- X87 label "X87".
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- X87 label "X87".
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- X87 sameAs m.07ldpb.
- X87 sameAs Q291904.
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- X87 wasDerivedFrom X87?oldid=604545012.
- X87 isPrimaryTopicOf X87.