Intrinsic support without -sse2

[Matthew Tippett]

Hello,

I want to be able to use SSE2 intrinsics (__m128i) without making 
all the code generate SSE instructions when it detects it can 
optimise it with SSE2 instructions.

I would like to have common CDEFS, but ensure that non CPU Feature 
guarded code is pIII compliant, but the intrinsics still exist where 
needed.

Put slightly differently I would like to have gcc target SSE class 
hardware *except* where I explicitly indicate I want to use intrinsics.

Is this possible at all?  -msse2 generates in some cases sse2 
optimisations, but is required to use sse2 intrinsics.

I am using gcc-3.3.3.

Regards,

Matthew