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Fix thumb armv5 atomics

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Change-Id: Ie9f98e5f5a08908d9d99e04bdc95fd506cc4a51e
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Paul Olav Tvete <paul.tvete@digia.com>
This commit is contained in:
BogDan Vatra 2013-02-14 11:00:59 +02:00 committed by The Qt Project
parent 212ff4f34d
commit 323ba46f72
1 changed files with 8 additions and 0 deletions
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8
src/corelib/arch/qatomic_armv5.h
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@ -163,12 +163,20 @@ __asm T QBasicAtomicOps<4>::fetchAndStoreRelaxed(T &_q_value, T newValue) Q_DECL
template<> template <typename T> inline
T QBasicAtomicOps<4>::fetchAndStoreRelaxed(T &_q_value, T newValue) Q_DECL_NOTHROW
{
#if defined(__thumb__)
register T originalValue;
do {
originalValue = _q_value;
} while (_q_cmpxchg(originalValue, newValue, &_q_value) != 0);
return originalValue;
#else
T originalValue;
asm volatile("swp %0,%2,[%3]"
: "=&r"(originalValue), "=m" (_q_value)
: "r"(newValue), "r"(&_q_value)
: "cc", "memory");
return originalValue;
#endif
}
#endif // Q_CC_RVCT