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MS intrinsics: implement __readgs{byte,word,dword,qword} (PR19054) 

llvm-svn: 203715
This commit is contained in:
Hans Wennborg 2014-03-12 21:09:05 +00:00
parent dd0f5304f6
commit a4421e03fa
1 changed files with 27 additions and 4 deletions
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31
clang/lib/Headers/Intrin.h
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@ -322,8 +322,12 @@ void __movsq(unsigned long long *, unsigned long long const *, size_t);
__int64 __mulh(__int64, __int64);
static __inline__
unsigned __int64 __popcnt64(unsigned __int64);
static __inline__
unsigned char __readgsbyte(unsigned long);
static __inline__
unsigned long __readgsdword(unsigned long);
static __inline__
unsigned __int64 __readgsqword(unsigned long);
unsigned short __readgsword(unsigned long);
unsigned __int64 __shiftleft128(unsigned __int64 _LowPart,
unsigned __int64 _HighPart,
@ -818,14 +822,15 @@ __faststorefence(void) {
}
#endif
/*----------------------------------------------------------------------------*\
|* readfs
|* (Pointers in address space #257 are relative to the FS segment register.)
|* readfs, readgs
|* (Pointers in address space #256 and #257 are relative to the GS and FS
|* segment registers, respectively.)
\*----------------------------------------------------------------------------*/
#ifdef __i386__
#define __ptr_to_addr_space(__addr_space_nbr, __type, __offset) \
((volatile __type __attribute__((__address_space__(__addr_space_nbr)))*) \
(__offset))
#ifdef __i386__
static __inline__ unsigned char __attribute__((__always_inline__, __nodebug__))
__readfsbyte(unsigned long __offset) {
return *__ptr_to_addr_space(257, unsigned char, __offset);
@ -842,8 +847,26 @@ static __inline__ unsigned short __attribute__((__always_inline__, __nodebug__))
__readfsword(unsigned long __offset) {
return *__ptr_to_addr_space(257, unsigned short, __offset);
}
#undef __ptr_to_addr_space
#endif
#ifdef __x86_64__
static __inline__ unsigned char __attribute__((__always_inline__, __nodebug__))
__readgsbyte(unsigned long __offset) {
return *__ptr_to_addr_space(256, unsigned char, __offset);
}
static __inline__ unsigned long __attribute__((__always_inline__, __nodebug__))
__readgsdword(unsigned long __offset) {
return *__ptr_to_addr_space(256, unsigned long, __offset);
}
static __inline__ unsigned __int64 __attribute__((__always_inline__, __nodebug__))
__readgsqword(unsigned long __offset) {
return *__ptr_to_addr_space(256, unsigned __int64, __offset);
}
static __inline__ unsigned short __attribute__((__always_inline__, __nodebug__))
__readgsword(unsigned long __offset) {
return *__ptr_to_addr_space(256, unsigned short, __offset);
}
#endif
#undef __ptr_to_addr_space
/*----------------------------------------------------------------------------*\
|* Misc
\*----------------------------------------------------------------------------*/