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[i386] pni => sse3 -- GCC 3.3.3 related
- From: Kelley Cook <kcook34 at ford dot com>
- To: gcc-patches at gcc dot gnu dot org, GCC Mailing List <gcc at gcc dot gnu dot org>
- Cc: Gabriel Dos Reis <gdr at cs dot tamu dot edu>, "H. J. Lu" <hjl at lucon dot org>
- Date: Tue, 03 Feb 2004 16:42:55 -0500
- Subject: [i386] pni => sse3 -- GCC 3.3.3 related
- Hop-count: 1
- Reply-to: Kelley Cook <kelleycook at yahoo dot com>
The 90nm version of the Pentium 4 (formerly code named Prescott) was
released yesterday. Somewhat surprisingly, the chip was not given a new
Unsurprisingly, PNI (Prescott New Instructions) were renamed to SSE3.
This mechanical patch updates GCC accordingly.
Note that this renaming is riding on the fact that "-mpni" support has
not yet been included in a FSF released compiler. However, this feature
was backported to be included in GCC 3.3.3
(http://gcc.gnu.org/ml/gcc-cvs/2003-11/msg00096.html). Personally I
think it would be a mistake to include an option switch which was based
on an internal codename in a released compiler -- especially a bug fix
compiler. If 3.3.3 is released as is then "-mpni" will have to be
supported for years afterward.
This is why I believe that either this patch also needs to included with
GCC 3.3.3 or else the recently added PNI support should be reverted from
Patch was bootstrapped on pentium4-pc-cygwin — though I do not have
Pentium 4 E-step to test its effectiveness on.