ibmc/powerpc.h File Reference

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Macros
#define	AO_nop_write()   AO_lwsync()
#define	AO_HAVE_nop_write
#define	AO_nop_read()   AO_lwsync()
#define	AO_HAVE_nop_read
#define	AO_HAVE_load_acquire
#define	AO_HAVE_store_release
#define	AO_HAVE_test_and_set
#define	AO_HAVE_test_and_set_acquire
#define	AO_HAVE_test_and_set_release
#define	AO_HAVE_test_and_set_full
#define	AO_HAVE_fetch_compare_and_swap
#define	AO_HAVE_fetch_compare_and_swap_acquire
#define	AO_HAVE_fetch_compare_and_swap_release
#define	AO_HAVE_fetch_compare_and_swap_full

Functions
void	AO_sync (void)
void	AO_lwsync (void)
AO_INLINE AO_t	AO_load_acquire (const volatile AO_t *addr)
AO_INLINE void	AO_store_release (volatile AO_t *addr, AO_t value)
AO_INLINE AO_TS_VAL_t	AO_test_and_set (volatile AO_TS_t *addr)
AO_INLINE AO_TS_VAL_t	AO_test_and_set_acquire (volatile AO_TS_t *addr)
AO_INLINE AO_TS_VAL_t	AO_test_and_set_release (volatile AO_TS_t *addr)
AO_INLINE AO_TS_VAL_t	AO_test_and_set_full (volatile AO_TS_t *addr)
AO_INLINE AO_t	AO_fetch_compare_and_swap (volatile AO_t *addr, AO_t old_val, AO_t new_val)
AO_INLINE AO_t	AO_fetch_compare_and_swap_acquire (volatile AO_t *addr, AO_t old_val, AO_t new_val)
AO_INLINE AO_t	AO_fetch_compare_and_swap_release (volatile AO_t *addr, AO_t old_val, AO_t new_val)
AO_INLINE AO_t	AO_fetch_compare_and_swap_full (volatile AO_t *addr, AO_t old_val, AO_t new_val)

Macro Definition Documentation

AO_HAVE_fetch_compare_and_swap

#define AO_HAVE_fetch_compare_and_swap

Definition at line 150 of file ibmc/powerpc.h.

AO_HAVE_fetch_compare_and_swap_acquire

#define AO_HAVE_fetch_compare_and_swap_acquire

Definition at line 160 of file ibmc/powerpc.h.

AO_HAVE_fetch_compare_and_swap_full

#define AO_HAVE_fetch_compare_and_swap_full

Definition at line 181 of file ibmc/powerpc.h.

AO_HAVE_fetch_compare_and_swap_release

#define AO_HAVE_fetch_compare_and_swap_release

Definition at line 169 of file ibmc/powerpc.h.

AO_HAVE_load_acquire

#define AO_HAVE_load_acquire

Definition at line 45 of file ibmc/powerpc.h.

AO_HAVE_nop_read

#define AO_HAVE_nop_read

Definition at line 34 of file ibmc/powerpc.h.

AO_HAVE_nop_write

#define AO_HAVE_nop_write

Definition at line 31 of file ibmc/powerpc.h.

AO_HAVE_store_release

#define AO_HAVE_store_release

Definition at line 53 of file ibmc/powerpc.h.

AO_HAVE_test_and_set

#define AO_HAVE_test_and_set

Definition at line 93 of file ibmc/powerpc.h.

AO_HAVE_test_and_set_acquire

#define AO_HAVE_test_and_set_acquire

Definition at line 101 of file ibmc/powerpc.h.

AO_HAVE_test_and_set_full

#define AO_HAVE_test_and_set_full

Definition at line 118 of file ibmc/powerpc.h.

AO_HAVE_test_and_set_release

#define AO_HAVE_test_and_set_release

Definition at line 108 of file ibmc/powerpc.h.

AO_nop_read

#define AO_nop_read

(

void

)

AO_lwsync()

Definition at line 33 of file ibmc/powerpc.h.

AO_nop_write

#define AO_nop_write

(

void

)

AO_lwsync()

Definition at line 30 of file ibmc/powerpc.h.

Function Documentation

AO_fetch_compare_and_swap()

AO_INLINE AO_t AO_fetch_compare_and_swap	(	volatile AO_t *	addr,
		AO_t	old_val,
		AO_t	new_val
	)

Definition at line 122 of file ibmc/powerpc.h.

{
  AO_t fetched_val;
# if defined(__powerpc64__) || defined(__ppc64__) || defined(__64BIT__)
    __asm__ __volatile__(
      "1:ldarx %0,0,%1\n"       /* load and reserve             */
      "cmpd %0, %3\n"           /* if load is not equal to      */
      "bne 2f\n"                /*   old_val, fail              */
      "stdcx. %2,0,%1\n"        /* else store conditional       */
      "bne- 1b\n"               /* retry if lost reservation    */
      "2:\n"
      : "=&r"(fetched_val)
      : "r"(addr), "r"(new_val), "r"(old_val)
      : "memory", "cr0");
# else
    __asm__ __volatile__(
      "1:lwarx %0,0,%1\n"       /* load and reserve             */
      "cmpw %0, %3\n"           /* if load is not equal to      */
      "bne 2f\n"                /*   old_val, fail              */
      "stwcx. %2,0,%1\n"        /* else store conditional       */
      "bne- 1b\n"               /* retry if lost reservation    */
      "2:\n"
      : "=&r"(fetched_val)
      : "r"(addr), "r"(new_val), "r"(old_val)
      : "memory", "cr0");
# endif
  return fetched_val;
}

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AO_fetch_compare_and_swap_acquire()

AO_INLINE AO_t AO_fetch_compare_and_swap_acquire	(	volatile AO_t *	addr,
		AO_t	old_val,
		AO_t	new_val
	)

Definition at line 153 of file ibmc/powerpc.h.

{
  AO_t result = AO_fetch_compare_and_swap(addr, old_val, new_val);
  AO_lwsync();
  return result;
}

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AO_fetch_compare_and_swap_full()

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

Definition at line 172 of file ibmc/powerpc.h.

{
  AO_t result;
  AO_lwsync();
  result = AO_fetch_compare_and_swap(addr, old_val, new_val);
  AO_lwsync();
  return result;
}

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AO_fetch_compare_and_swap_release()

AO_INLINE AO_t AO_fetch_compare_and_swap_release	(	volatile AO_t *	addr,
		AO_t	old_val,
		AO_t	new_val
	)

Definition at line 163 of file ibmc/powerpc.h.

{
  AO_lwsync();
  return AO_fetch_compare_and_swap(addr, old_val, new_val);
}

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AO_load_acquire()

AO_INLINE AO_t AO_load_acquire

(

const volatile AO_t *

addr

)

Definition at line 39 of file ibmc/powerpc.h.

{
  AO_t result = *addr;
  AO_lwsync();
  return result;
}

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AO_lwsync()

void AO_lwsync

(

void

)

Definition at line 59 of file gcc/powerpc.h.

{
#ifdef __NO_LWSYNC__
  __asm__ __volatile__("sync" : : : "memory");
#else
  __asm__ __volatile__("lwsync" : : : "memory");
#endif
}

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AO_store_release()

AO_INLINE void AO_store_release	(	volatile AO_t *	addr,
		AO_t	value
	)

Definition at line 48 of file ibmc/powerpc.h.

{
  AO_lwsync();
  *addr = value;
}

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AO_sync()

void AO_sync

(

void

)

AO_test_and_set()

AO_INLINE AO_TS_VAL_t AO_test_and_set

(

volatile AO_TS_t *

addr

)

Definition at line 60 of file ibmc/powerpc.h.

                                        {
#if defined(__powerpc64__) || defined(__ppc64__) || defined(__64BIT__)
/* Completely untested.  And we should be using smaller objects anyway. */
  unsigned long oldval;
  unsigned long temp = 1; /* locked value */
 
  __asm__ __volatile__(
               "1:ldarx %0,0,%1\n"   /* load and reserve               */
               "cmpdi %0, 0\n"       /* if load is                     */
               "bne 2f\n"            /*   non-zero, return already set */
               "stdcx. %2,0,%1\n"    /* else store conditional         */
               "bne- 1b\n"           /* retry if lost reservation      */
               "2:\n"                /* oldval is zero if we set       */
              : "=&r"(oldval)
              : "r"(addr), "r"(temp)
              : "memory", "cr0");
#else
  int oldval;
  int temp = 1; /* locked value */
 
  __asm__ __volatile__(
               "1:lwarx %0,0,%1\n"   /* load and reserve               */
               "cmpwi %0, 0\n"       /* if load is                     */
               "bne 2f\n"            /*   non-zero, return already set */
               "stwcx. %2,0,%1\n"    /* else store conditional         */
               "bne- 1b\n"           /* retry if lost reservation      */
               "2:\n"                /* oldval is zero if we set       */
              : "=&r"(oldval)
              : "r"(addr), "r"(temp)
              : "memory", "cr0");
#endif
  return (AO_TS_VAL_t)oldval;
}

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AO_test_and_set_acquire()

AO_INLINE AO_TS_VAL_t AO_test_and_set_acquire

(

volatile AO_TS_t *

addr

)

Definition at line 96 of file ibmc/powerpc.h.

                                                {
  AO_TS_VAL_t result = AO_test_and_set(addr);
  AO_lwsync();
  return result;
}

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AO_test_and_set_full()

AO_INLINE AO_TS_VAL_t AO_test_and_set_full

(

volatile AO_TS_t *

addr

)

Definition at line 111 of file ibmc/powerpc.h.

                                             {
  AO_TS_VAL_t result;
  AO_lwsync();
  result = AO_test_and_set(addr);
  AO_lwsync();
  return result;
}

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AO_test_and_set_release()

AO_INLINE AO_TS_VAL_t AO_test_and_set_release

(

volatile AO_TS_t *

addr

)

Definition at line 104 of file ibmc/powerpc.h.

                                                {
  AO_lwsync();
  return AO_test_and_set(addr);
}

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