On Sat, Nov 12, 2011 at 9:32 AM, Uros Bizjak <ubiz...@gmail.com> wrote:
> On Sat, Nov 12, 2011 at 3:19 AM, H.J. Lu <hongjiu...@intel.com> wrote:
>> The current x32 implementation uses LEAs to convert 32bit address to
>> 64bit.  However, we can use addr32 prefix to use 32bit address directly.
>> It improves performance by 5% in SPEC CPU 2K/2006.  All changes are done
>> in x86 backend, except for a smaill unwind library assert change:
>> http://gcc.gnu.org/ml/gcc-patches/2011-11/msg01555.html
>> due to return column size difference.
>> For x86-64, Pmode can be 32bit or 64bit, but word_mode is always 64bit.
>> push/pop only work on word_mode.  Also string instructions take Pmode
>> pointers.
>> I will submit a set of patches to use 32bit Pmode for x32.  This is
>> the first patch to properly use Pmode and word_mode.  It also adds
>> addr32 prefix to string instructions if needed.  OK for trunk?
> Not for stage3.
> Uros.

Now trunk in stage1.  The patch is at


OK for trunk?



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