1 files changed, 82 insertions, 0 deletions
diff --git a/sysdeps/sparc/sparc64/atomicity.h b/sysdeps/sparc/sparc64/atomicity.h
new file mode 100644
index 0000000000..33cf66623e
--- /dev/null
+++ b/sysdeps/sparc/sparc64/atomicity.h
@@ -0,0 +1,82 @@
+/* Low-level functions for atomic operations.  Sparc64 version.
+   Copyright (C) 1999 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#ifndef _ATOMICITY_H
+#define _ATOMICITY_H	1
+
+#include <inttypes.h>
+
+static inline int
+__attribute__ ((unused))
+exchange_and_add (volatile uint32_t *mem, int val)
+{
+  uint32_t tmp1, tmp2;
+
+  __asm__ __volatile__("1:	lduw	[%2], %0\n\t"
+		       "	add	%0, %3, %1\n\t"
+		       "	cas	[%2], %0, %1\n\t"
+		       "	sub	%0, %1, %0\n\t"
+		       "	brnz,pn	%0, 1b\n\t"
+		       "	 nop"
+		       : "=&r" (tmp1), "=&r" (tmp2)
+		       : "r" (mem), "r" (val)
+		       : "memory");
+  return tmp2;
+}
+
+static inline void
+__attribute__ ((unused))
+atomic_add (volatile uint32_t *mem, int val)
+{
+  uint32_t tmp1, tmp2;
+
+  __asm__ __volatile__("1:	lduw	[%2], %0\n\t"
+		       "	add	%0, %3, %1\n\t"
+		       "	cas	[%2], %0, %1\n\t"
+		       "	sub	%0, %1, %0\n\t"
+		       "	brnz,pn	%0, 1b\n\t"
+		       "	 nop"
+		       : "=&r" (tmp1), "=&r" (tmp2)
+		       : "r" (mem), "r" (val)
+		       : "memory");
+}
+
+static inline int
+__attribute__ ((unused))
+compare_and_swap (volatile long int *p, long int oldval, long int newval)
+{
+  register long int tmp, tmp2;
+
+  __asm__ __volatile__("1:	ldx	[%4], %0\n\t"
+		       "	mov	%2, %1\n\t"
+		       "	cmp	%0, %3\n\t"
+		       "	bne,a,pn %%xcc, 2f\n\t"
+		       "	 mov	0, %0\n\t"
+		       "	casx	[%4], %0, %1\n\t"
+		       "	sub	%0, %1, %0\n\t"
+		       "	brnz,pn	%0, 1b\n\t"
+		       "	 mov	1, %0\n\t"
+		       "2:"
+		       : "=&r" (tmp), "=&r" (tmp2)
+		       : "r" (newval), "r" (oldval), "r" (p)
+		       : "memory");
+  return tmp;
+}
+
+#endif /* atomicity.h */