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-rw-r--r--sysdeps/s390/s390-32/atomicity.h76
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diff --git a/sysdeps/s390/s390-32/atomicity.h b/sysdeps/s390/s390-32/atomicity.h
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+/* Low-level functions for atomic operations. S390 version.
+ Copyright (C) 2000, 2001 Free Software Foundation, Inc.
+ Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com).
+ 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 result;
+ __asm__ __volatile__(
+ " L %0,%2\n"
+ " LA 2,%1\n"
+ "0: LR 0,%0\n"
+ " AR 0,%3\n"
+ " CS %0,0,0(2)\n"
+ " JL 0b"
+ : "=&d" (result), "=m" (*mem)
+ : "1" (*mem), "d" (val) : "0", "1", "2" );
+ return result;
+}
+
+static inline void
+__attribute__ ((unused))
+atomic_add (volatile uint32_t *mem, int val)
+{
+ __asm__ __volatile__(
+ " LA 2,%0\n"
+ "0: L 0,%1\n"
+ " LR 1,0\n"
+ " AR 1,%2\n"
+ " CS 0,1,0(2)\n"
+ " JL 0b"
+ : "=m" (*mem) : "0" (*mem), "d" (val) : "0", "1", "2" );
+}
+
+static inline int
+__attribute__ ((unused))
+compare_and_swap (volatile long int *p, long int oldval, long int newval)
+{
+ int retval;
+
+ __asm__ __volatile__(
+ " la 1,%1\n"
+ " lr 0,%2\n"
+ " cs 0,%3,0(1)\n"
+ " ipm %0\n"
+ " srl %0,28\n"
+ "0:"
+ : "=&r" (retval), "+m" (*p)
+ : "d" (oldval) , "d" (newval)
+ : "memory", "0", "1", "cc");
+ return !retval;
+}
+
+#endif /* atomicity.h */