GCC vector extensions

[Hariharan Sandanagobalane]

Hello all,
Is it possible to use rtl vector patterns like vec_extractm, vec_setm 
from C code? It looks like C subscipting for vector variables was 
allowed at some point and then removed. So, can these rtl patterns only 
be used from languages other than C?

Of course, i can use these in target builtins, but i am trying to see if 
these can be used by language constructs itself.

Cheers
Hari

PS: I raised a related question in 
http://gcc.gnu.org/ml/gcc-help/2010-11/msg00021.html.