Hm, interesting. I assume that we don't instruct g++ or msvc to generate any fancy SSE4.1 instructions anyway because V8 has to run on old non-SSE hardware - in which case the benefit of using the compiler intrinsics is probably void.
Den 24. apr. 2012 19.20 skrev Vitaly Repeshko <[email protected]>: > FYI. http://msdn.microsoft.com/en-us/library/bb385231.aspx says "If > you run code that uses this intrinsic on hardware that does not > support the popcnt instruction, the results are unpredictable." > > > -- Vitaly > > On Tue, Apr 24, 2012 at 10:03 AM, Florian Schneider > <[email protected]> wrote: > > You're welcome. The Win32 builder still not happy. I'm not so familiar > with > > our Windows buildbot configuration, so I'm fixing it for now by just > > avoiding the problematic compiler intrinsic > > (http://code.google.com/p/v8/source/detail?r=11428) It should not make > a big > > difference, should it? > > > > > > > > Den 24. apr. 2012 18.14 skrev Alexandre Rames <[email protected] > >: > > > >> Thanks! > >> > >> > >> On Tue, Apr 24, 2012 at 4:36 PM, <[email protected]> wrote: > >>> > >>> Thanks. Still LGTM. > >>> > >>> I'll re-land it > >>> > >>> http://codereview.chromium.org/9638018/ > >> > >> > > > > -- > > v8-dev mailing list > > [email protected] > > http://groups.google.com/group/v8-dev > > -- > v8-dev mailing list > [email protected] > http://groups.google.com/group/v8-dev > -- v8-dev mailing list [email protected] http://groups.google.com/group/v8-dev
