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Add implementations of some MSVC intrinsics 

Adds an implementation for _InterlockedCompareExchangePointer() and
__faststorefence().

Patch by David Ziman!

llvm-svn: 200239
This commit is contained in:
Reid Kleckner 2014-01-27 19:16:35 +00:00
parent 369a9c3b51
commit f08d658d48
1 changed files with 16 additions and 0 deletions
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16
clang/lib/Headers/Intrin.h
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@ -307,6 +307,7 @@ void __addgsbyte(unsigned long, unsigned char);
void __addgsdword(unsigned long, unsigned long);
void __addgsqword(unsigned long, unsigned __int64);
void __addgsword(unsigned long, unsigned short);
static __inline__
void __faststorefence(void);
void __incgsbyte(unsigned long);
void __incgsdword(unsigned long);
@ -394,6 +395,7 @@ __int64 _InterlockedCompareExchange64_HLERelease(__int64 volatile *, __int64,
__int64);
__int64 _InterlockedCompareExchange64_np(__int64 volatile *_Destination,
__int64 _Exchange, __int64 _Comparand);
static __inline__
void *_InterlockedCompareExchangePointer(void *volatile *_Destination,
void *_Exchange, void *_Comparand);
void *_InterlockedCompareExchangePointer_np(void *volatile *_Destination,
@ -791,6 +793,14 @@ _InterlockedCompareExchange(long volatile *_Destination,
return _Comparand;
}
#ifdef __x86_64__
static __inline__ void *__attribute__((__always_inline__, __nodebug__))
_InterlockedCompareExchangePointer(void *volatile *_Destination,
void *_Exchange, void *_Comparand) {
__atomic_compare_exchange(_Destination, &_Comparand, &_Exchange, 0, 0, 0);
return _Comparand;
}
#endif
#ifdef __x86_64__
static __inline__ __int64 __attribute__((__always_inline__, __nodebug__))
_InterlockedCompareExchange64(__int64 volatile *_Destination,
__int64 _Exchange, __int64 _Comparand) {
@ -816,6 +826,12 @@ __attribute__((deprecated("use other intrinsics or C++11 atomics instead")))
_WriteBarrier(void) {
__asm__ volatile ("" : : : "memory");
}
#ifdef __x86_64__
static __inline__ void __attribute__((__always_inline__, __nodebug__))
__faststorefence(void) {
__asm__ volatile("lock orq $0, (%%rsp)" : : : "memory");
}
#endif
/*----------------------------------------------------------------------------*\
|* readfs
|* (Pointers in address space #257 are relative to the FS segment register.)