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2003-03-27 Roland McGrath <roland@redhat.com>

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* sysdeps/powerpc/bits/atomic.h [! __powerpc64__]
	(__arch_atomic_decrement_if_positive_64): Fix bogus definition.
This commit is contained in:
Roland McGrath 2003-03-28 07:17:02 +00:00
parent 3e60b5f234
commit 448163bae2
1 changed files with 12 additions and 12 deletions
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24
sysdeps/powerpc/bits/atomic.h
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@ -68,13 +68,13 @@ typedef uintmax_t uatomic_max_t;
#ifdef __powerpc64__
/*
* The 32-bit exchange_bool is different on powerpc64 because the subf
* does signed 64-bit arthmatic while the lwarx is 32-bit unsigned
* The 32-bit exchange_bool is different on powerpc64 because the subf
* does signed 64-bit arthmatic while the lwarx is 32-bit unsigned
* (a load word and zero (high 32) form).
* In powerpc64 register values are 64-bit by default, including oldval.
* Net we need to extend sign word the result of lwarx to 64-bit so the
* 64-bit subtract from gives the expected result and sets the condition
* correctly.
* correctly.
*/
# define __arch_compare_and_exchange_bool_32_acq(mem, newval, oldval) \
({ \
@ -134,7 +134,7 @@ typedef uintmax_t uatomic_max_t;
: "cr0"); \
__val; \
})
# define __arch_atomic_decrement_if_positive_64(mem) \
({ int __val, __tmp; \
__asm __volatile ("1: ldarx %0,0,%3\n" \
@ -175,7 +175,7 @@ typedef uintmax_t uatomic_max_t;
# define __arch_atomic_exchange_and_add_64(mem, value) \
({ abort (); (*mem) = (value); })
# define __arch_atomic_decrement_if_positive_64(mem) \
({ abort (); (*mem) = (value); })
({ abort (); (*mem)--; })
#endif
#define __arch_atomic_exchange_32(mem, value) \
@ -203,8 +203,8 @@ typedef uintmax_t uatomic_max_t;
: "cr0"); \
__val; \
})
#define __arch_atomic_decrement_if_positive_32(mem) \
#define __arch_atomic_decrement_if_positive_32(mem) \
({ int __val, __tmp; \
__asm __volatile ("1: lwarx %0,0,%3\n" \
" cmpwi 0,%0,0\n" \
@ -246,13 +246,13 @@ typedef uintmax_t uatomic_max_t;
/* Decrement *MEM if it is > 0, and return the old value. */
#define atomic_decrement_if_positive(mem) \
({ __typeof (*(mem)) __result; \
#define atomic_decrement_if_positive(mem) \
({ __typeof (*(mem)) __result; \
if (sizeof (*mem) == 4) \
__result = __arch_atomic_decrement_if_positive_32 (mem); \
__result = __arch_atomic_decrement_if_positive_32 (mem); \
else if (sizeof (*mem) == 8) \
__result = __arch_atomic_decrement_if_positive_64 (mem); \
else \
__result = __arch_atomic_decrement_if_positive_64 (mem); \
else \
abort (); \
__result; \
})