Faster Math ?

[Andrew Haley]

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 FdLibm.java.  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. <https://www.redhat.com>
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