test/cpuperf/cpu_cmpexg.S

   1 /* $DragonFly: src/test/cpuperf/cpu_cmpexg.S,v 1.1 2004/02/09 18:08:54 dillon Exp $ */
   2
   3         .globl  test_dummy
   4         .globl  test_load
   5         .globl  test_str
   6
   7         .p2align 5
   8 test_dummy:
   9         movl    4(%esp),%ecx
  10         movl    $0,%edx
  11         movl    $1,%eax
  12         movl    %ebx,%edx
  13         movl    $0,(%ecx)
  14         addl    $3,%eax
  15         ret
  16
  17         .p2align 5
  18 test_load:
  19         movl    4(%esp),%ecx
  20         movl    $0,%edx
  21         movl    $1,%eax
  22         cmpxchgl        %edx,(%ecx)     /* instruction under test */
  23         movl    %ebx,%edx
  24         movl    $0,(%ecx)
  25         addl    $3,%eax
  26         ret
  27
  28         .p2align 5
  29 test_str:
  30         .asciz  "non-locked cmpxchgl (successful exchange) in pipeline"
  31