Added frsqrt.
Added frsqrt.

OlegOAndreev/bx,fluffyfreak/bx,septag/termite,dariomanesku/bx,attilaz/bx,0-wiz-0/bx,septag/termite,coconutxin/bx,mmicko/bx,septag/bx,dariomanesku/bx,bkaradzic/bx,mmicko/bx,MikePopoloski/bx,pigpigyyy/bx,septag/termite,septag/termite,0-wiz-0/bx,coconutxin/bx,pigpigyyy/bx,fluffyfreak/bx,septag/bx,OlegOAndreev/bx,attilaz/bx,MikePopoloski/bx,bkaradzic/bx,septag/termite,septag/termite