nptl/pthread_spin_trylock.shared.s

   1 .globl pthread_spin_trylock
   2 .type pthread_spin_trylock,@function
   3 .align 1<<4
   4 pthread_spin_trylock:
   5  movl $1, %eax
   6  xorl %ecx, %ecx
   7  lock
   8  cmpxchgl %ecx, (%rdi)
   9  movl $16, %eax
  10  cmovel %ecx, %eax
  11  retq
  12 .size pthread_spin_trylock,.-pthread_spin_trylock