s390.h File Reference

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Macros
#define	AO_HAVE_compare_and_swap_full
#define	AO_HAVE_fetch_compare_and_swap_full

Functions
AO_INLINE int	AO_compare_and_swap_full (volatile AO_t *addr, AO_t old, AO_t new_val)
AO_INLINE AO_t	AO_fetch_compare_and_swap_full (volatile AO_t *addr, AO_t old, AO_t new_val)

Macro Definition Documentation

AO_HAVE_compare_and_swap_full

#define AO_HAVE_compare_and_swap_full

Definition at line 70 of file s390.h.

AO_HAVE_fetch_compare_and_swap_full

#define AO_HAVE_fetch_compare_and_swap_full

Definition at line 88 of file s390.h.

Function Documentation

AO_compare_and_swap_full()

AO_INLINE int AO_compare_and_swap_full	(	volatile AO_t *	addr,
		AO_t	old,
		AO_t	new_val
	)

Definition at line 53 of file s390.h.

{
  int retval;
  __asm__ __volatile__ (
# ifndef __s390x__
    "     cs  %1,%2,0(%3)\n"
# else
    "     csg %1,%2,0(%3)\n"
# endif
  "     ipm %0\n"
  "     srl %0,28\n"
  : "=&d" (retval), "+d" (old)
  : "d" (new_val), "a" (addr)
  : "cc", "memory");
  return retval == 0;
}

AO_fetch_compare_and_swap_full()

AO_INLINE AO_t AO_fetch_compare_and_swap_full	(	volatile AO_t *	addr,
		AO_t	old,
		AO_t	new_val
	)

Definition at line 74 of file s390.h.

{
  __asm__ __volatile__ (
#   ifndef __s390x__
      "     cs %0,%2,%1\n"
#   else
      "     csg %0,%2,%1\n"
#   endif
    : "+d" (old), "=Q" (*addr)
    : "d" (new_val), "m" (*addr)
    : "cc", "memory");
  return old;
}