glibc/sysdeps/i960/sub_n.s
1995-10-16 01:18:40 +00:00

22 lines
524 B
ArmAsm

.text
.align 4
.globl ___mpn_sub_n
___mpn_sub_n:
mov 1,g6 # set carry-save register
cmpo 1,0 # clear cy
Loop: subo 1,g3,g3 # update loop counter
ld (g1),g5 # load from s1_ptr
addo 4,g1,g1 # s1_ptr++
ld (g2),g4 # load from s2_ptr
addo 4,g2,g2 # s2_ptr++
cmpo g6,1 # restore cy from g6, relies on cy being 0
subc g4,g5,g4 # main subtract
subc 0,0,g6 # save cy in g6
st g4,(g0) # store result to res_ptr
addo 4,g0,g0 # res_ptr++
cmpobne 0,g3,Loop # when branch is taken, cy will be 0
mov g6,g0
ret