ack/mach/i86/libem/sbi.s
1985-02-17 00:57:20 +00:00

28 lines
376 B
ArmAsm

.define .sbi
! $Header$
! #bytes in cx , top of stack in ax
.sbi:
pop bx ! return subress
cmp cx,2
jne 1f
pop cx
sub ax,cx
neg ax
jmp bx
1:
cmp cx,4
jne 9f
pop dx
pop cx
sub cx,ax
mov ax,cx
pop cx
sbc cx,dx
push cx
jmp bx
9:
mov ax,EODDZ
push ax
jmp .trp