sysdeps/sparc/sparc32/pthread_spin_lock.S

   1 /* Copyright (C) 2012-2018 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <http://www.gnu.org/licenses/>.  */
  17
  18 #include <sysdep.h>
  19
  20         .text
  21 ENTRY(pthread_spin_lock)
  22 1:      ldstub          [%o0], %g1
  23         orcc            %g1, 0x0, %g0
  24         bne,a           2f
  25          ldub           [%o0], %g1
  26         retl
  27          mov            0, %o0
  28 2:      orcc            %g1, 0x0, %g0
  29         bne,a           2b
  30          ldub           [%o0], %g1
  31         ba,a            1b
  32 END(pthread_spin_lock)