V3D_CTNCA
state->ct0ca = V3D_READ(V3D_CTNCA(0));
state->ct1ca = V3D_READ(V3D_CTNCA(1));
ct0ca = V3D_READ(V3D_CTNCA(0));
ct1ca = V3D_READ(V3D_CTNCA(1));
V3D_WRITE(V3D_CTNCA(thread), start);