+ ! But since comparison implies subtraction, we subtract
+ ! modulus and then add it back if subraction borrowed.
+
+ subcc @acc[0],-1,@acc[0]
+ subccc @acc[1],-1,@acc[1]
+ subccc @acc[2],-1,@acc[2]
+ subccc @acc[3], 0,@acc[3]
+ subccc @acc[4], 0,@acc[4]
+ subccc @acc[5], 0,@acc[5]
+ subccc @acc[6], 1,@acc[6]
+ subccc @acc[7],-1,@acc[7]
+ subc $carry,0,$carry
+