Faster Math ?
aph at redhat.com
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 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 !
Java Platform Lead Engineer
Red Hat UK Ltd. <https://www.redhat.com>
EAC8 43EB D3EF DB98 CC77 2FAD A5CD 6035 332F A671
More information about the core-libs-dev