This change is based on Wine's winnt.h implementation. Using a register
variable for NtCurrentTeb
allows the compiler to optimize the access more effectively.
---
mingw-w64-headers/include/winnt.h | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/mingw-w64-headers/include/winnt.h b/mingw-w64-headers/include/winnt.h
index 96a610c1d..499f72219 100644
--- a/mingw-w64-headers/include/winnt.h
+++ b/mingw-w64-headers/include/winnt.h
@@ -10211,11 +10211,10 @@ typedef DWORD (WINAPI *PRTL_RUN_ONCE_INIT_FN)(PRTL_RUN_ONCE, PVOID, PVOID *);
PVOID GetFiberData(VOID);
#if defined (__aarch64__) || defined(__arm64ec__)
+ register struct _TEB *__mingw_current_teb __asm__("x18");
FORCEINLINE struct _TEB *NtCurrentTeb(VOID)
{
- struct _TEB *teb;
- __asm ("mov %0, x18" : "=r" (teb));
- return teb;
+ return __mingw_current_teb;
}
FORCEINLINE PVOID GetCurrentFiber(VOID)
{
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