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-rw-r--r--sysdeps/powerpc/atomicity.h99
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diff --git a/sysdeps/powerpc/atomicity.h b/sysdeps/powerpc/atomicity.h
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+/* 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 */