This is the mail archive of the gcc-patches@gcc.gnu.org mailing list for the GCC project.

Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]
Other format: [Raw text]

Re: Vectorized _cpp_clean_line

> 
> I believe I've found the extra failures.  You adjusted this path:

Thanks.

> I'm currently testing this patch that merges your patch with
> David Miller's bit-twiddling version, plus extra stuff for
> Alpha, IA-64, and SSE2 (without SSE4.2).

At least for sse 4.2 I'm not sure the table lookup
for alignment is worth it. The unaligned loads are quite
cheap on current micro architectures with sse 4.2 
and the page end test is also not that expensive.

I originally avoided the indirect call because I was worried
about the effect on CPUs with indirect branch predictor.

-Andi
Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]