/*
* Copyright (c) 1991-1994 by Xerox Corporation. All rights reserved.
* Copyright (c) 1996-1999 by Silicon Graphics. All rights reserved.
* Copyright (c) 1999-2003 by Hewlett-Packard Company. All rights reserved.
*
*
* THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
* OR IMPLIED. ANY USE IS AT YOUR OWN RISK.
*
* Permission is hereby granted to use or copy this program
* for any purpose, provided the above notices are retained on all copies.
* Permission to modify the code and to distribute modified code is granted,
* provided the above notices are retained, and a notice that the code was
* modified is included with the above copyright notice.
*
*/
/* The cas instruction causes an emulation trap for the */
/* 060 with a misaligned pointer, so let's avoid this. */
#undef AO_t
typedef unsigned long AO_t __attribute__((__aligned__(4)));
/* FIXME. Very incomplete. */
#include "../all_aligned_atomic_load_store.h"
/* Are there any m68k multiprocessors still around? */
/* AFAIK, Alliants were sequentially consistent. */
#include "../ordered.h"
/* The value at addr is semi-phony. */
/* 'tas' sets bit 7 while the return */
/* value pretends all bits were set, */
/* which at least matches AO_TS_SET. */
__asm__ __volatile__(
"tas %1; sne %0"
: "=d" (oldval), "=m" (*addr)
: "m" (*addr)
: "memory");
/* This cast works due to the above. */
return (AO_TS_VAL_t)oldval;
}
#define AO_HAVE_test_and_set_full
/* Returns nonzero if the comparison succeeded. */
AO_INLINE int
AO_compare_and_swap_full(volatile AO_t *addr,
AO_t old, AO_t new_val)
{
char result;
