T=d ld f mf cd cf cld
V=x,y
R=3,5,0.5
F=if(x<4, sin(y),cos(y+1)) * if(x<4, cos(y),sin(y+1))
C=fp_less(x,4)!=0 ? (fp_sin(y)*fp_cos(y)) : (fp_cos(y+1)*fp_sin(y+1))
