diff options
Diffstat (limited to 'gcc-4.9/libitm/config/linux/x86/futex_bits.h')
-rw-r--r-- | gcc-4.9/libitm/config/linux/x86/futex_bits.h | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/gcc-4.9/libitm/config/linux/x86/futex_bits.h b/gcc-4.9/libitm/config/linux/x86/futex_bits.h new file mode 100644 index 000000000..69016817a --- /dev/null +++ b/gcc-4.9/libitm/config/linux/x86/futex_bits.h @@ -0,0 +1,82 @@ +/* Copyright (C) 2008-2014 Free Software Foundation, Inc. + Contributed by Richard Henderson <rth@redhat.com>. + + This file is part of the GNU Transactional Memory Library (libitm). + + Libitm 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 of the License, or + (at your option) any later version. + + Libitm 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 + <http://www.gnu.org/licenses/>. */ + +#ifdef __x86_64__ +# ifndef SYS_futex +# define SYS_futex 202 +# endif + +static inline long +sys_futex0 (std::atomic<int> *addr, long op, long val) +{ + register long r10 __asm__("%r10") = 0; + long res; + + __asm volatile ("syscall" + : "=a" (res) + : "0" (SYS_futex), "D" (addr), "S" (op), "d" (val), "r" (r10) + : "r11", "rcx", "memory"); + + return res; +} + +#else +# ifndef SYS_futex +# define SYS_futex 240 +# endif + +# ifdef __PIC__ + +static inline long +sys_futex0 (std::atomic<int> *addr, int op, int val) +{ + long res; + + __asm volatile ("xchgl\t%%ebx, %2\n\t" + "int\t$0x80\n\t" + "xchgl\t%%ebx, %2" + : "=a" (res) + : "0"(SYS_futex), "r" (addr), "c"(op), + "d"(val), "S"(0) + : "memory"); + return res; +} + +# else + +static inline long +sys_futex0 (std::atomic<int> *addr, int op, int val) +{ + long res; + + __asm volatile ("int $0x80" + : "=a" (res) + : "0"(SYS_futex), "b" (addr), "c"(op), + "d"(val), "S"(0) + : "memory"); + return res; +} + +# endif /* __PIC__ */ +#endif /* __x86_64__ */ |