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authorupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
committerupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
commit554fd8c5195424bdbcabf5de30fdc183aba391bd (patch)
tree976dc5ab7fddf506dadce60ae936f43f58787092 /libgomp/config/linux/sparc
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Diffstat (limited to 'libgomp/config/linux/sparc')
-rw-r--r--libgomp/config/linux/sparc/futex.h108
1 files changed, 108 insertions, 0 deletions
diff --git a/libgomp/config/linux/sparc/futex.h b/libgomp/config/linux/sparc/futex.h
new file mode 100644
index 000000000..214b786f7
--- /dev/null
+++ b/libgomp/config/linux/sparc/futex.h
@@ -0,0 +1,108 @@
+/* Copyright (C) 2005, 2008, 2009 Free Software Foundation, Inc.
+ Contributed by Jakub Jelinek <jakub@redhat.com>.
+
+ 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
+ <http://www.gnu.org/licenses/>. */
+
+/* Provide target-specific access to the futex system call. */
+
+#include <sys/syscall.h>
+
+static inline long
+sys_futex0 (int *addr, int op, int val)
+{
+ register long int g1 __asm__ ("g1");
+ register long int o0 __asm__ ("o0");
+ register long int o1 __asm__ ("o1");
+ register long int o2 __asm__ ("o2");
+ register long int o3 __asm__ ("o3");
+
+ g1 = SYS_futex;
+ o0 = (long) addr;
+ o1 = op;
+ o2 = val;
+ o3 = 0;
+
+#ifdef __arch64__
+# define SYSCALL_STRING "ta\t0x6d; bcs,a,pt %%xcc, 1f; sub %%g0, %%o0, %%o0; 1:"
+#else
+# define SYSCALL_STRING "ta\t0x10; bcs,a 1f; sub %%g0, %%o0, %%o0; 1:"
+#endif
+
+ __asm volatile (SYSCALL_STRING
+ : "=r" (g1), "=r" (o0)
+ : "0" (g1), "1" (o0), "r" (o1), "r" (o2), "r" (o3)
+ : "g2", "g3", "g4", "g5", "g6",
+ "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7",
+ "f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15",
+ "f16", "f17", "f18", "f19", "f20", "f21", "f22", "f23",
+ "f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31",
+#ifdef __arch64__
+ "f32", "f34", "f36", "f38", "f40", "f42", "f44", "f46",
+ "f48", "f50", "f52", "f54", "f56", "f58", "f60", "f62",
+#endif
+ "cc", "memory");
+ return o0;
+}
+
+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)
+{
+#if defined __arch64__ || defined __sparc_v9__
+ __asm volatile ("membar #LoadLoad" : : : "memory");
+#else
+ __asm volatile ("" : : : "memory");
+#endif
+}
+
+static inline void
+atomic_write_barrier (void)
+{
+#if defined __arch64__ || defined __sparc_v9__
+ __asm volatile ("membar #StoreStore" : : : "memory");
+#else
+ __sync_synchronize ();
+#endif
+}