FPU_SUBS
FPU_SUBS(r3, 0, r3);
FPU_SUBS(d3, r3, y3); FPU_SUBCS(d2, r2, y2); \
FPU_SUBS(d1, x1, t1);
FPU_SUBS(d1, x1, t1);
FPU_SUBS(d2, x2, t2);
FPU_SUBS(d2, x2, t2);
FPU_SUBS(d3, x3, t3);
FPU_SUBS(d3, x3, t3);