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configure.host: Enable hash synchronization for alpha*-*.

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* configure.host: Enable hash synchronization for alpha*-*.
* include/posix-threads.h (_Jv_ThreadSelf): Added inline function for alpha.
* java/lang/natObject.cc (compare_and_swap, release_set,
compare_and_swap_release): Added inline functions for alpha.

From-SVN: r44251
This commit is contained in:
Jeff Sturm 2001-07-23 03:51:17 +00:00 • committed by Jeff Sturm
parent 0b6301aebe
commit 092a1f5ab3
4 changed files with 65 additions and 0 deletions
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38
libjava/java/lang/natObject.cc
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@ -391,6 +391,44 @@ typedef size_t obj_addr_t; /* Integer type big enough for object */
}
#endif
#if defined(__GNUC__) && defined(__alpha__)
inline static bool
compare_and_swap(volatile obj_addr_t *addr,
obj_addr_t old,
obj_addr_t new_val)
{
unsigned long oldval;
char result;
__asm__ __volatile__(
"1:ldq_l %0, %1\n\t" \
"cmpeq %0, %5, %2\n\t" \
"beq %2, 2f\n\t" \
"mov %3, %0\n\t" \
"stq_c %0, %1\n\t" \
"bne %0, 2f\n\t" \
"br 1b\n\t" \
"2:mb"
: "=&r"(oldval), "=m"(*addr), "=&r"(result)
: "r" (new_val), "m"(*addr), "r"(old) : "memory");
return (bool) result;
}
inline static void
release_set(volatile obj_addr_t *addr, obj_addr_t new_val)
{
__asm__ __volatile__("mb" : : : "memory");
*(addr) = new_val;
}
inline static bool
compare_and_swap_release(volatile obj_addr_t *addr,
obj_addr_t old,
obj_addr_t new_val)
{
return compare_and_swap(addr, old, new_val);
}
#endif
// Try to determine whether we are on a multiprocessor, i.e. whether
// spinning may be profitable.
// This should really use a suitable autoconf macro.