On Fri, Dec 09, 2016 at 07:38:47AM +0100, Peter Zijlstra wrote: > Turns out using GCC-6.2.1 we have the same problem on i386, GCC doesn't > recognise the 32x32 mults and generates crap. > > This used to work :/
I tried: gcc-4.4: good gcc-4.6, gcc-4.8, gcc-5.4, gcc-6.2: bad