80x87 | Article about 80x87 by The Free Dictionary
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x87The floating point instructions in x86 CPUs. The 87 comes from the earlier designations of math coprocessors (8087), which were separate chips. See x86.
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The solution for linear equations using the Gaussian Elimination and Gauss Jordan methods was experimented with programs written in C, embedded with 80x87 instructions (since the coefficients are floating point numbers).
The programs were developed using the C programming language with 80x87 floating point instructions embedded.