r200239 - Add implementations of some MSVC intrinsics

[Reid Kleckner]

Author: rnk
Date: Mon Jan 27 13:16:35 2014
New Revision: 200239

URL: http://llvm.org/viewvc/llvm-project?rev=200239&view=rev
Log:
Add implementations of some MSVC intrinsics

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

Patch by David Ziman!

Modified:
    cfe/trunk/lib/Headers/Intrin.h

Modified: cfe/trunk/lib/Headers/Intrin.h
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Headers/Intrin.h?rev=200239&r1=200238&r2=200239&view=diff
==============================================================================
--- cfe/trunk/lib/Headers/Intrin.h (original)
+++ cfe/trunk/lib/Headers/Intrin.h Mon Jan 27 13:16:35 2014
@@ -307,6 +307,7 @@ void __addgsbyte(unsigned long, unsigned
 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_HL
                                                  __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 volatil
   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 int
 _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.)