Jonathan Crapuchettes Wrote: > Michael Parrott wrote: > > Jonathan Crapuchettes Wrote: > > > >> I followed the example in issue #30: > >> http://bitbucket.org/goshawk/gdc/issue/30/d_inlineasm-updates > >> > >> DFLAGS='-O2 -g -frelease -march=pentium3' ../configure --enable-languages=d > >> --disable-multilib --disable-shared > >> > >> Is this wrong? > >> JC > >> > >> Michael Parrott wrote: > >>> Jonathan Crapuchettes Wrote: > >>> > >>>> I have been trying to add the SSE2 array operation code to the > >>>> compilation, but > >>>> it seems like the DFLAGS variable isn't being used. Can you offer any > >>>> suggestions? > >>>> Thank you, > >>>> JC > >>> > >>> Did you set DFLAGS before running configure? If you didn't, that might be > >>> why. > >>> > >>> Example: > >>> > >>> DFLAGS="-g" > >>> export DFLAGS > >>> ../configure --enable-languages=d ..... > >>> make > >>> sudo make install > >>> > >>> Something like that should work. > > > > No, that should be fine. > > > > What is wrong when you do that? Are there errors when you build? Does > > Phobos not seem to be taking advantage of the SSE operations? > > > > In phobos/internal/array{byte, double, float, int, short}.d, you need to > > uncomment the sections labelled "version (D_InlineAsm_X86)" to enable the > > ASM code. > > I did uncommented the version sections, but thank you for the reminder. > > I can tell that the SSE code is not being used because I compared two pieces > of > code: > > for (int i = 0; i < a.length; i++) > c[i] = a[i] / 1000; > > and > > c[] = a[] / 1000; > > They should produce the same result and they do, but the array operation code > should be much faster. I base this assumption off of the same speed test > using > DMD. The execution time for the two code segments, produced by GDC, are about > the same. I also compared the assembly for the objects created by GDC and > DMD. > The GDC code is not using the SSE code as specified in the arrayDouble.d > file, > but the DMD code is. > > If you have suggestions, I am all ears. > Thank you for taking the time to help me, > JC
Well, off the top of my head I can't think of anything else other than just trying to install GDC again. Perhaps you are giving the wrong -march option? (Maybe something other than pentium3?)
