sysdeps/i960/sub_n.s

   1 .text
   2         .align 4
   3         .globl ___mpn_sub_n
   4 ___mpn_sub_n:
   5         mov     1,g6            # set carry-save register
   6         cmpo    1,0             # clear cy
   7
   8 Loop:   subo    1,g3,g3         # update loop counter
   9         ld      (g1),g5         # load from s1_ptr
  10         addo    4,g1,g1         # s1_ptr++
  11         ld      (g2),g4         # load from s2_ptr
  12         addo    4,g2,g2         # s2_ptr++
  13         cmpo    g6,1            # restore cy from g6, relies on cy being 0
  14         subc    g4,g5,g4        # main subtract
  15         subc    0,0,g6          # save cy in g6
  16         st      g4,(g0)         # store result to res_ptr
  17         addo    4,g0,g0         # res_ptr++
  18         cmpobne 0,g3,Loop       # when branch is taken, cy will be 0
  19
  20         mov     g6,g0
  21         ret