d/freebsd-dev
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Fix Read-After-Write (RAW) dependency violation for ar.ccv in

Browse Source 
isc_atomic_xadd() and isc_atomic_cmpxchg().

Approved by:	dougb@
MFC after:	1 week
This commit is contained in:
Marcel Moolenaar 2009-12-07 02:17:58 +00:00
parent 4dbb79b42d
commit de7459e59d
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=200202
1 changed files with 2 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
contrib/bind9/lib/isc/ia64/include/isc/atomic.h
View File

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