ghc-fast-math
Non IEEE-754 compliant compile-time floating-point optimisations
The "Numeric.FastMath" module brings into scope many unsafe 'RULES' for 'Float's and 'Double's that can greatly improve run time performance. It is roughly equivalent to gcc's '-ffast-math' compiler flag. Optimisation (at least '-O1') must be enabled for any 'RULES' to take effect. These rules are unsafe because they don't strictly adhere to the IEEE-754 regulations and may subtly change the results of your numeric computations. See the<http://github.com/liyang/fast-math/ README>on github for more details.
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