On Monday, 31 December 2018 at 13:24:29 UTC, kinke wrote:
On Sunday, 30 December 2018 at 13:39:44 UTC, Guillaume Piolat wrote:
Been waiting for an exp() rewrite. And Boost-licensed! I'm using expf() from whatever libc is shipped and the variability of results and lack of control is annoying.

exp != {ld,fr}exp. Phobos includes a proper single/double precision exp implementation since v2.082 and is Boost licensed...

llvm_exp (defers to C runtime) gives considerable speed improvement over `std.math.exp`.

I've tested `expf` form the VS runtime exhaustively for 32-bit `float` and it showed the relative accuracy was within < 0.0002% of std.math.exp,

It's not concerning at all, what is more is the variability of C runtime though vs a D function. Looking for speed AND control :)

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