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3366. [bug] Fixed Read-After-Write dependency violation for IA64

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atomic operations. [RT #25181]
This commit is contained in:
ckb
2012-08-17 13:02:50 -05:00
parent 24c7ce73cf
commit 339f08ee1e
2 changed files with 5 additions and 2 deletions
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3
CHANGES
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@@ -1,3 +1,6 @@
3366. [bug] Fixed Read-After-Write dependency violation for IA64
atomic operations. [RT #25181]
3365. [bug] Removed spurious newlines from log messages in 3365. [bug] Removed spurious newlines from log messages in
zone.c [RT #30675] zone.c [RT #30675]

4
lib/isc/ia64/include/isc/atomic.h
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@@ -41,7 +41,7 @@ isc_atomic_xadd(isc_int32_t *p, isc_int32_t val)
for (prev = *(volatile isc_int32_t *)p; ; prev = swapped) { for (prev = *(volatile isc_int32_t *)p; ; prev = swapped) {
swapped = prev + val; swapped = prev + val;
__asm__ volatile( __asm__ volatile(
"mov ar.ccv=%2;" "mov ar.ccv=%2;;"
"cmpxchg4.acq %0=%4,%3,ar.ccv" "cmpxchg4.acq %0=%4,%3,ar.ccv"
: "=r" (swapped), "=m" (*p) : "=r" (swapped), "=m" (*p)
: "r" (prev), "r" (swapped), "m" (*p) : "r" (prev), "r" (swapped), "m" (*p)
@@ -84,7 +84,7 @@ isc_atomic_cmpxchg(isc_int32_t *p, isc_int32_t cmpval, isc_int32_t val)
isc_int32_t ret; isc_int32_t ret;
__asm__ volatile( __asm__ volatile(
"mov ar.ccv=%2;" "mov ar.ccv=%2;;"
"cmpxchg4.acq %0=%4,%3,ar.ccv" "cmpxchg4.acq %0=%4,%3,ar.ccv"
: "=r" (ret), "=m" (*p) : "=r" (ret), "=m" (*p)
: "r" (cmpval), "r" (val), "m" (*p) : "r" (cmpval), "r" (val), "m" (*p)