1 files changed, 99 insertions, 0 deletions
diff --git a/sysdeps/powerpc/atomicity.h b/sysdeps/powerpc/atomicity.h
new file mode 100644
index 0000000000..dba09658cb
--- /dev/null
+++ b/sysdeps/powerpc/atomicity.h
@@ -0,0 +1,99 @@
+/* Low-level functions for atomic operations.  PowerPC version.
+   Copyright (C) 1997 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)
+{
+  int tmp, result;
+  __asm__ __volatile__ ("\
+0:	lwarx	%0,0,%2
+	add	%1,%3,%0
+	stwcx.	%1,0,%2
+	bne-	0b
+" : "=&r"(result), "=&r"(tmp) : "r" (mem), "r"(val) : "cr0");
+  return result;
+}
+
+static inline void
+__attribute__ ((unused))
+atomic_add (volatile uint32_t *mem, int val)
+{
+  int tmp;
+  __asm__ __volatile__("\
+0:	lwarx	%0,0,%1
+	add	%0,%2,%0
+	stwcx.	%0,0,%1
+	bne-	0b
+" : "=&r"(tmp) : "r" (mem), "r"(val) : "cr0");
+}
+
+static inline int
+__attribute__ ((unused))
+compare_and_swap (volatile long int *p, long int oldval, long int newval)
+{
+  int result;
+  __asm__ __volatile__ ("\
+0:	lwarx	%0,0,%1
+	xor.	%0,%0,%2
+	cntlzw	%0,%0
+	bne-	1f
+	stwcx.	%3,0,%1
+	bne-	0b
+1:	srwi	%0,%0,5
+" : "=&r"(result) : "r"(p), "r"(oldval), "r"(newval) : "cr0");
+  return result;
+}
+
+static inline long int
+__attribute__ ((unused))
+always_swap (volatile long int *p, long int newval)
+{
+  long int result;
+  __asm__ __volatile__ ("\
+0:	lwarx	%0,0,%1
+	stwcx.	%2,0,%1
+	bne-	0b
+" : "=&r"(result) : "r"(p), "r"(newval) : "cr0");
+  return result;
+}
+
+static inline int
+__attribute__ ((unused))
+test_and_set (volatile long int *p, long int oldval, long int newval)
+{
+  int result;
+  __asm__ __volatile__ ("\
+0:	lwarx	%0,0,%1
+	xor.	%0,%0,%2
+	cntlzw	%0,%0
+	bne-	1f
+	stwcx.	%3,0,%1
+	bne-	0b
+1:	srwi	%0,%0,5
+" : "=&r"(result) : "r"(p), "r"(oldval), "r"(newval) : "cr0");
+  return result;
+}
+
+#endif /* atomicity.h */