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Does GCC have an equivalent compiler switch to VC’s floating point model switch (/fp)?
In particular, my application benefits from compiling with /fp:fast and precision is not a big deal, how should I compile it with GCC?
Try
-ffast-math. On gcc 4.4.1, this turns on:-fno-math-errno– Don’t set errno for single instruction math functions.-funsafe-math-optimizations– Assume arguments and result of math operations are valid, and potentially violate standards-ffinite-math-only– Assume arguments and results are finite.-fno-rounding-math– Enable optimizations that assume default rounding. This is the default, but it could be overridden by something else.-fno-signaling-nans– Enable optimizations that can change number of math exceptions.; also default-fcx-limited-range– Assume range reduction is not needed for complex number division:__FAST_MATH__macro.You could also enable these individually.