When do you use fp:strict as opposed to fp:precise? Is it better to use the former if I want “more precise” calculations and avoid rounding errors? What is the heuristic behind using either?
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When do you use fp:strict as opposed to fp:precise? Is it better to use the former if I want “more precise” calculations and avoid rounding errors? What is the heuristic behind using either?
The standard IEEE 754 specifies a method for floating point calculations and storage of floating point values in memory.
Using
fp:strictmeans that all the rules of IEEE 754 are respected.fp:strictis used to sustain bitwise compatibility between different compilers and platforms.fp:preciseweakens some of the rules, however it warranties that the precision of the calculations will not be lost.fp:fastallows compiler specific optimizations and transformations of expressions containing floating point calculation. It is the fastest methods but the results will differ between different compilers and platforms.