power.s

   1 .section .data
   2 .section .text
   3 .globl _start
   4
   5 _start:
   6 pushl $3
   7 pushl $2
   8 call power
   9 addl $8, %esp
  10 pushl %eax
  11 push $2
  12 push $5
  13 call power
  14 add $8, %esp
  15 popl %ebx
  16
  17 add %eax, %ebx
  18 movl $1, %eax
  19 int $0x80
  20
  21
  22 .type power, @function
  23 power:
  24 pushl %ebp
  25 movl %esp, %ebp
  26 subl $4, %esp
  27 movl 8(%ebp), %ebx
  28 movl 12(%ebp), %ecx
  29 movl %ebx, -4(%ebp)
  30
  31 power_loop_start:
  32 cmpl $1, %ecx
  33 je end_power
  34 movl -4(%ebp), %eax
  35 imull %ebx, -4(%ebp)
  36 decl %ecx
  37 jum power_loop_start
  38
  39 end_power:
  40 movl -4(%ebp), %eax
  41 movl %ebp, %esp
  42 popl %ebp
  43 ret
  44