m68k.h File Reference

Include dependency graph for m68k.h:

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Macros
#define	AO_HAVE_test_and_set_full
#define	AO_HAVE_compare_and_swap_full
#define	AO_T_IS_INT

Typedefs
typedef unsigned long AO_t	__attribute__((__aligned__(4)))

Functions
AO_INLINE AO_TS_VAL_t	AO_test_and_set_full (volatile AO_TS_t *addr)
AO_INLINE int	AO_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 64 of file m68k.h.

AO_HAVE_test_and_set_full

#define AO_HAVE_test_and_set_full

Definition at line 48 of file m68k.h.

AO_T_IS_INT

#define AO_T_IS_INT

Definition at line 68 of file m68k.h.

Typedef Documentation

__attribute__

int __leaf__ __attribute__

Definition at line 21 of file m68k.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 52 of file m68k.h.

{
  char result;
 
  __asm__ __volatile__(
                "cas.l %3,%4,%1; seq %0"
                : "=d" (result), "=m" (*addr)
                : "m" (*addr), "d" (old), "d" (new_val)
                : "memory");
  return -result;
}

AO_test_and_set_full()

AO_INLINE AO_TS_VAL_t AO_test_and_set_full

(

volatile AO_TS_t *

addr

)

Definition at line 33 of file m68k.h.

                                             {
  AO_TS_t oldval;
 
  /* 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;
}