The R13B03 release.OTP_R13B03

1 files changed, 173 insertions, 0 deletions

diff --git a/erts/include/internal/sparc32/atomic.h b/erts/include/internal/sparc32/atomic.h
new file mode 100644
index 0000000000..d6fdc6b2a4
--- /dev/null
+++ b/erts/include/internal/sparc32/atomic.h
@@ -0,0 +1,173 @@
+/* 
+ * %CopyrightBegin%
+ * 
+ * Copyright Ericsson AB 2005-2009. All Rights Reserved.
+ * 
+ * The contents of this file are subject to the Erlang Public License,
+ * Version 1.1, (the "License"); you may not use this file except in
+ * compliance with the License. You should have received a copy of the
+ * Erlang Public License along with this software. If not, it can be
+ * retrieved online at http://www.erlang.org/.
+ * 
+ * Software distributed under the License is distributed on an "AS IS"
+ * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+ * the License for the specific language governing rights and limitations
+ * under the License.
+ * 
+ * %CopyrightEnd%
+ */
+
+/*
+ * Native ethread atomics on SPARC V9.
+ * Author: Mikael Pettersson.
+ */
+#ifndef ETHR_SPARC32_ATOMIC_H
+#define ETHR_SPARC32_ATOMIC_H
+
+typedef struct {
+    volatile long counter;
+} ethr_native_atomic_t;
+
+#ifdef ETHR_TRY_INLINE_FUNCS
+
+#if defined(__arch64__)
+#define CASX "casx"
+#else
+#define CASX "cas"
+#endif
+
+static ETHR_INLINE void
+ethr_native_atomic_init(ethr_native_atomic_t *var, long i)
+{
+    var->counter = i;
+}
+#define ethr_native_atomic_set(v, i)	ethr_native_atomic_init((v), (i))
+
+static ETHR_INLINE long
+ethr_native_atomic_read(ethr_native_atomic_t *var)
+{
+    return var->counter;
+}
+
+static ETHR_INLINE long
+ethr_native_atomic_add_return(ethr_native_atomic_t *var, long incr)
+{
+    long old, tmp;
+
+    __asm__ __volatile__("membar #LoadLoad|#StoreLoad\n");
+    do {
+	old = var->counter;
+	tmp = old+incr;
+	__asm__ __volatile__(
+	    CASX " [%2], %1, %0"
+	    : "=&r"(tmp)
+	    : "r"(old), "r"(&var->counter), "0"(tmp)
+	    : "memory");
+    } while (__builtin_expect(old != tmp, 0));
+    __asm__ __volatile__("membar #StoreLoad|#StoreStore");
+    return old+incr;
+}
+
+static ETHR_INLINE void
+ethr_native_atomic_add(ethr_native_atomic_t *var, long incr)
+{
+    (void)ethr_native_atomic_add_return(var, incr);
+}
+
+static ETHR_INLINE long
+ethr_native_atomic_inc_return(ethr_native_atomic_t *var)
+{
+    return ethr_native_atomic_add_return(var, 1);
+}
+
+static ETHR_INLINE void
+ethr_native_atomic_inc(ethr_native_atomic_t *var)
+{
+    (void)ethr_native_atomic_add_return(var, 1);
+}
+
+static ETHR_INLINE long
+ethr_native_atomic_dec_return(ethr_native_atomic_t *var)
+{
+    return ethr_native_atomic_add_return(var, -1);
+}
+
+static ETHR_INLINE void
+ethr_native_atomic_dec(ethr_native_atomic_t *var)
+{
+    (void)ethr_native_atomic_add_return(var, -1);
+}
+
+static ETHR_INLINE long
+ethr_native_atomic_and_retold(ethr_native_atomic_t *var, long mask)
+{
+    long old, tmp;
+
+    __asm__ __volatile__("membar #LoadLoad|#StoreLoad\n");
+    do {
+	old = var->counter;
+	tmp = old & mask;
+	__asm__ __volatile__(
+	    CASX " [%2], %1, %0"
+	    : "=&r"(tmp)
+	    : "r"(old), "r"(&var->counter), "0"(tmp)
+	    : "memory");
+    } while (__builtin_expect(old != tmp, 0));
+    __asm__ __volatile__("membar #StoreLoad|#StoreStore");
+    return old;
+}
+
+static ETHR_INLINE long
+ethr_native_atomic_or_retold(ethr_native_atomic_t *var, long mask)
+{
+    long old, tmp;
+
+    __asm__ __volatile__("membar #LoadLoad|#StoreLoad\n");
+    do {
+	old = var->counter;
+	tmp = old | mask;
+	__asm__ __volatile__(
+	    CASX " [%2], %1, %0"
+	    : "=&r"(tmp)
+	    : "r"(old), "r"(&var->counter), "0"(tmp)
+	    : "memory");
+    } while (__builtin_expect(old != tmp, 0));
+    __asm__ __volatile__("membar #StoreLoad|#StoreStore");
+    return old;
+}
+
+static ETHR_INLINE long
+ethr_native_atomic_xchg(ethr_native_atomic_t *var, long val)
+{
+    long old, new;
+
+    __asm__ __volatile__("membar #LoadLoad|#StoreLoad");
+    do {
+	old = var->counter;
+	new = val;
+	__asm__ __volatile__(
+	    CASX " [%2], %1, %0"
+	    : "=&r"(new)
+	    : "r"(old), "r"(&var->counter), "0"(new)
+	    : "memory");
+    } while (__builtin_expect(old != new, 0));
+    __asm__ __volatile__("membar #StoreLoad|#StoreStore");
+    return old;
+}
+
+static ETHR_INLINE long
+ethr_native_atomic_cmpxchg(ethr_native_atomic_t *var, long new, long old)
+{
+    __asm__ __volatile__("membar #LoadLoad|#StoreLoad\n");
+    __asm__ __volatile__(
+      CASX " [%2], %1, %0"
+      : "=&r"(new)
+      : "r"(old), "r"(&var->counter), "0"(new)
+      : "memory");
+    __asm__ __volatile__("membar #StoreLoad|#StoreStore");
+    return new;
+}
+
+#endif /* ETHR_TRY_INLINE_FUNCS */
+
+#endif /* ETHR_SPARC32_ATOMIC_H */