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Elementary Functions and Not Following IEEE754 Floating-Point Standard (2020)


The IEEE-754 Standard for floating-point numbers was introduced initially in 1985 to solve the problem of diverse floating point implementations prevent code being portable and increase stability across platforms. It has been widely adopted and revised over the last 30 years and if you have dealt

The IEEE-754 Standard for floating-point numbers was introduced initially in 1985 to solve the problem of diverse floating point implementations prevent code being portable and increase stability across platforms. There were some very interesting quotes (names removed) when I asked why this is known about but not fixed ranging from benign disregard for the standard to placing the burden of correctness on the user who should know that the functions are wrong: Being correct for all values at higher precision is more expensive and difficult to verify ( table makers dilemma) but that is no reason to not make that function available as the standard says rather than picking an arbitrary level of error and sticking to it without any constraints on the negative side-effects this may cause.

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