Faster Math ?

Andrew Haley aph at
Thu Nov 9 15:59:13 UTC 2017

On 09/11/17 13:33, Laurent Bourgès wrote:
> I checked in the latest jdk master and both cbrt / acos are NOT intrinsics.
> However, cbrt(x) = pow(x, 1/3) so it may be optmized...
> Could someone tell me how cbrt() is concretely implemented ?

It's in  It's not great, but it's better than it used to be
now that it's not a native call.  I'm seeing that it's twice as fast as
the previous native implementation.

> In native libfdm, there is no e_cbrt.c !

Andrew Haley
Java Platform Lead Engineer
Red Hat UK Ltd. <>
EAC8 43EB D3EF DB98 CC77 2FAD A5CD 6035 332F A671

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