nptl/elision-trylock.s

   1         .text
   2         .p2align 4,,15
   3         .globl  __lll_trylock_elision
   4         .type   __lll_trylock_elision, @function
   5 __lll_trylock_elision:
   6         xabort  $253
   7         movzwl  (%rsi), %eax
   8         testw   %ax, %ax
   9         jg      .L2
  10         movl    $-1, %eax
  11         xbegin  .L3
  12 .L3:
  13         cmpl    $-1, %eax
  14         je      .L13
  15         testb   $2, %al
  16         je      .L14
  17 .L6:
  18         xorl    %eax, %eax
  19         movl    $1, %edx
  20         lock cmpxchgl   %edx, (%rdi)
  21         setne   %al
  22         movzbl  %al, %eax
  23 .L1:
  24         rep ret
  25         .p2align 4,,10
  26         .p2align 3
  27 .L2:
  28         movzwl  (%rsi), %eax
  29         subl    $1, %eax
  30         movw    %ax, (%rsi)
  31         jmp     .L6
  32         .p2align 4,,10
  33         .p2align 3
  34 .L13:
  35         movl    (%rdi), %eax
  36         testl   %eax, %eax
  37         je      .L1
  38         xabort  $255
  39         jmp     .L6
  40         .p2align 4,,10
  41         .p2align 3
  42 .L14:
  43         movswl  (%rsi), %eax
  44         movl    4+__elision_aconf(%rip), %edx
  45         cmpl    %edx, %eax
  46         je      .L6
  47         movw    %dx, (%rsi)
  48         jmp     .L6
  49         .size   __lll_trylock_elision, .-__lll_trylock_elision