optmizing gcc 3.3.1 for AMD athlon xp

[Kelley Cook]

Zbyszek Łuszpiński wrote:

 > I know that specyfing -march=athlon-xp option allows me to not specify
 > -mcpu=athlon-xp or deprecated -mathlon-xp because it is included in
 > -march option. But what about:

For the x86 port specifying an -march will allow you to use all the 
instructions that that chip is capable of using.

For the Athlon-XP this implies that the following are on by default:

 > -mmmx
yes
 > -msse
yes
 > -m3dnow
yes

However, it will not turn on -fpmath=sse by default.