RFR: 8210416: [linux] Poor StrictMath performance due to non-optimized compilation

[Severin Gehwolf]

Hi Erik,

Thanks for the review!

On Tue, 2018-09-11 at 08:57 -0700, Erik Joelsson wrote:
> Hello Severin,
> 
> Even if using the macro, I still think you need to add a condition on 
> the compiler types where the switch can be reasonably expected to exist.

How about this?
http://cr.openjdk.java.net/~sgehwolf/webrevs/JDK-8210416/webrev.05/

Thanks,
Severin

> On 2018-09-11 05:02, Severin Gehwolf wrote:
> > On Mon, 2018-09-10 at 09:29 -0700, Erik Joelsson wrote:
> > > I see. I was not aware of that issue, but we clearly need to file a bug
> > > for it and fix it. In this case I think it's fine to us the macro however.
> > 
> > OK. Update webrev, which now uses FLAGS_COMPILER_CHECK_ARGUMENTS.
> > 
> > http://cr.openjdk.java.net/~sgehwolf/webrevs/JDK-8210416/webrev.04/
> > 
> > Micro-benchmark results from running [1] for x86_64 and ppc64le are
> > here (-O2 is sufficient it seems):
> > 
> > http://cr.openjdk.java.net/~sgehwolf/webrevs/JDK-8210416/microbenchmarks_results/
> > 
> > More thoughts?
> > 
> > Thanks,
> > Severin
> > 
> > [1] https://github.com/gromero/strictmath/
> > 
> 
>