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-rw-r--r--libgomp/config/linux/alpha/futex.h109
1 files changed, 109 insertions, 0 deletions
diff --git a/libgomp/config/linux/alpha/futex.h b/libgomp/config/linux/alpha/futex.h
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+++ b/libgomp/config/linux/alpha/futex.h
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+/* Copyright (C) 2005, 2008, 2009 Free Software Foundation, Inc.
+ Contributed by Richard Henderson <rth@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. */
+
+#ifndef SYS_futex
+#define SYS_futex 394
+#endif
+
+
+static inline void
+futex_wait (int *addr, int val)
+{
+ register long sc_0 __asm__("$0");
+ register long sc_16 __asm__("$16");
+ register long sc_17 __asm__("$17");
+ register long sc_18 __asm__("$18");
+ register long sc_19 __asm__("$19");
+
+ sc_0 = SYS_futex;
+ sc_16 = (long) addr;
+ sc_17 = gomp_futex_wait;
+ sc_18 = val;
+ sc_19 = 0;
+ __asm volatile ("callsys"
+ : "=r" (sc_0), "=r"(sc_19)
+ : "0"(sc_0), "r" (sc_16), "r"(sc_17), "r"(sc_18), "1"(sc_19)
+ : "$1", "$2", "$3", "$4", "$5", "$6", "$7", "$8",
+ "$22", "$23", "$24", "$25", "$27", "$28", "memory");
+ if (__builtin_expect (sc_19, 0) && sc_0 == ENOSYS)
+ {
+ gomp_futex_wait &= ~FUTEX_PRIVATE_FLAG;
+ gomp_futex_wake &= ~FUTEX_PRIVATE_FLAG;
+ sc_0 = SYS_futex;
+ sc_17 &= ~FUTEX_PRIVATE_FLAG;
+ sc_19 = 0;
+ __asm volatile ("callsys"
+ : "=r" (sc_0), "=r"(sc_19)
+ : "0"(sc_0), "r" (sc_16), "r"(sc_17), "r"(sc_18),
+ "1"(sc_19)
+ : "$1", "$2", "$3", "$4", "$5", "$6", "$7", "$8",
+ "$22", "$23", "$24", "$25", "$27", "$28", "memory");
+ }
+}
+
+static inline void
+futex_wake (int *addr, int count)
+{
+ register long sc_0 __asm__("$0");
+ register long sc_16 __asm__("$16");
+ register long sc_17 __asm__("$17");
+ register long sc_18 __asm__("$18");
+ register long sc_19 __asm__("$19");
+
+ sc_0 = SYS_futex;
+ sc_16 = (long) addr;
+ sc_17 = gomp_futex_wake;
+ sc_18 = count;
+ __asm volatile ("callsys"
+ : "=r" (sc_0), "=r"(sc_19)
+ : "0"(sc_0), "r" (sc_16), "r"(sc_17), "r"(sc_18)
+ : "$1", "$2", "$3", "$4", "$5", "$6", "$7", "$8",
+ "$22", "$23", "$24", "$25", "$27", "$28", "memory");
+ if (__builtin_expect (sc_19, 0) && sc_0 == ENOSYS)
+ {
+ gomp_futex_wait &= ~FUTEX_PRIVATE_FLAG;
+ gomp_futex_wake &= ~FUTEX_PRIVATE_FLAG;
+ sc_0 = SYS_futex;
+ sc_17 &= ~FUTEX_PRIVATE_FLAG;
+ __asm volatile ("callsys"
+ : "=r" (sc_0), "=r"(sc_19)
+ : "0"(sc_0), "r" (sc_16), "r"(sc_17), "r"(sc_18)
+ : "$1", "$2", "$3", "$4", "$5", "$6", "$7", "$8",
+ "$22", "$23", "$24", "$25", "$27", "$28", "memory");
+ }
+}
+
+static inline void
+cpu_relax (void)
+{
+ __asm volatile ("" : : : "memory");
+}
+
+static inline void
+atomic_write_barrier (void)
+{
+ __asm volatile ("wmb" : : : "memory");
+}