X-Git-Url: https://oss.titaniummirror.com/gitweb?a=blobdiff_plain;f=libgomp%2Fconfig%2Flinux%2Fia64%2Ffutex.h;fp=libgomp%2Fconfig%2Flinux%2Fia64%2Ffutex.h;h=e5e9aac3996706f9d30979e7b8e4f4cb9cc7ff10;hb=6fed43773c9b0ce596dca5686f37ac3fc0fa11c0;hp=0000000000000000000000000000000000000000;hpb=27b11d56b743098deb193d510b337ba22dc52e5c;p=msp430-gcc.git diff --git a/libgomp/config/linux/ia64/futex.h b/libgomp/config/linux/ia64/futex.h new file mode 100644 index 00000000..e5e9aac3 --- /dev/null +++ b/libgomp/config/linux/ia64/futex.h @@ -0,0 +1,94 @@ +/* Copyright (C) 2005, 2008, 2009 Free Software Foundation, Inc. + Contributed by Richard Henderson . + + This file is part of the GNU OpenMP 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 + + + +static inline long +sys_futex0(int *addr, long op, int val) +{ + register long out0 asm ("out0") = (long) addr; + register long out1 asm ("out1") = op; + register long out2 asm ("out2") = val; + register long out3 asm ("out3") = 0; + register long r8 asm ("r8"); + register long r10 asm ("r10"); + register long r15 asm ("r15") = SYS_futex; + + __asm __volatile ("break 0x100000" + : "=r"(r15), "=r"(out0), "=r"(out1), "=r"(out2), "=r"(out3), + "=r"(r8), "=r"(r10) + : "r"(r15), "r"(out0), "r"(out1), "r"(out2), "r"(out3) + : "memory", "out4", "out5", "out6", "out7", + /* Non-stacked integer registers, minus r8, r10, r15. */ + "r2", "r3", "r9", "r11", "r12", "r13", "r14", "r16", "r17", "r18", + "r19", "r20", "r21", "r22", "r23", "r24", "r25", "r26", "r27", + "r28", "r29", "r30", "r31", + /* Predicate registers. */ + "p6", "p7", "p8", "p9", "p10", "p11", "p12", "p13", "p14", "p15", + /* Non-rotating fp registers. */ + "f6", "f7", "f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15", + /* Branch registers. */ + "b6"); + return r8 & r10; +} + +static inline void +futex_wait (int *addr, int val) +{ + long err = sys_futex0 (addr, gomp_futex_wait, val); + if (__builtin_expect (err == ENOSYS, 0)) + { + gomp_futex_wait &= ~FUTEX_PRIVATE_FLAG; + gomp_futex_wake &= ~FUTEX_PRIVATE_FLAG; + sys_futex0 (addr, gomp_futex_wait, val); + } +} + +static inline void +futex_wake (int *addr, int count) +{ + long err = sys_futex0 (addr, gomp_futex_wake, count); + if (__builtin_expect (err == ENOSYS, 0)) + { + gomp_futex_wait &= ~FUTEX_PRIVATE_FLAG; + gomp_futex_wake &= ~FUTEX_PRIVATE_FLAG; + sys_futex0 (addr, gomp_futex_wake, count); + } +} + +static inline void +cpu_relax (void) +{ + __asm volatile ("hint @pause" : : : "memory"); +} + +static inline void +atomic_write_barrier (void) +{ + __sync_synchronize (); +}