/* Copyright (C) 2011-2016 Free Software Foundation, Inc. Contributed by Walter Lee (walt@tilera.com) This file is part of the GNU Offloading and Multi Processing Library (libgomp). Libgomp is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3, or (at your option) any later version. Libgomp is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. Under Section 7 of GPL version 3, you are granted additional permissions described in the GCC Runtime Library Exception, version 3.1, as published by the Free Software Foundation. You should have received a copy of the GNU General Public License and a copy of the GCC Runtime Library Exception along with this program; see the files COPYING3 and COPYING.RUNTIME respectively. If not, see . */ /* Provide target-specific access to the futex system call. */ #include #include static inline void sys_futex0 (int *addr, int op, int val) { long _sys_result; long _clobber_r2, _clobber_r3, _clobber_r4, _clobber_r5, _clobber_r10; int err; __asm__ __volatile__ ( "swint1" : "=R00" (_sys_result), "=R01" (err), "=R02" (_clobber_r2), "=R03" (_clobber_r3), "=R04" (_clobber_r4), "=R05" (_clobber_r5), "=R10" (_clobber_r10) : "R10" (SYS_futex), "R00" (addr), "R01" (op), "R02" (val), "R03" (0) : "r6", "r7", "r8", "r9", "r11", "r12", "r13", "r14", "r15", "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", "r24", "r25", "r26", "r27", "r28", "r29", "memory"); } static inline void futex_wait (int *addr, int val) { sys_futex0 (addr, FUTEX_WAIT, val); } static inline void futex_wake (int *addr, int count) { sys_futex0 (addr, FUTEX_WAKE, count); } static inline void cpu_relax (void) { __asm volatile ("" : : : "memory"); } static inline void atomic_write_barrier (void) { __sync_synchronize (); }