commit 97806c0ecf06b25295200d636978b06e28aa89bc
author Martin Storsjö <martin@martin.st> Wed Jan 13 23:13:15 2021 +0200
committer Martin Storsjö <martin@martin.st> Wed Jan 20 23:06:16 2021 +0200
tree f56f83bc6041ec9b812f6691bdaecb1bb53343da
parent f3c53a51df5c08f181e13a39b1cd6fd1d41edb96

headers: Implement __debugbreak, MemoryBarrier and YieldProcessor for armv7 and aarch64

Signed-off-by: Martin Storsjö <martin@martin.st>

mingw-w64-headers/crt/_mingw.h.in

diff --git a/mingw-w64-headers/crt/_mingw.h.in b/mingw-w64-headers/crt/_mingw.h.in
index 01eff66..25513d7 100644
--- a/mingw-w64-headers/crt/_mingw.h.in
+++ b/mingw-w64-headers/crt/_mingw.h.in
@@ -580,7 +580,15 @@
 void __cdecl __debugbreak(void);
 __MINGW_INTRIN_INLINE void __cdecl __debugbreak(void)
 {
+#if defined(__i386__) || defined(__x86_64__)
   __asm__ __volatile__("int {$}3":);
+#elif defined(__arm__)
+  __asm__ __volatile__("udf #1");
+#elif defined(__aarch64__)
+  __asm__ __volatile__("brk #0xf000");
+#else
+  __asm__ __volatile__("unimplemented");
+#endif
 }
 #endif
 #endif

mingw-w64-headers/include/winnt.h

diff --git a/mingw-w64-headers/include/winnt.h b/mingw-w64-headers/include/winnt.h
index 0decf49..5133c1f 100644
--- a/mingw-w64-headers/include/winnt.h
+++ b/mingw-w64-headers/include/winnt.h
@@ -1846,6 +1846,9 @@
 #define InterlockedCompareExchangePointerAcquire _InterlockedCompareExchangePointer
 #define InterlockedCompareExchangePointerRelease _InterlockedCompareExchangePointer
 
+#define YieldProcessor() __asm__ __volatile__("dmb ishst\n\tyield":::"memory")
+#define MemoryBarrier() __asm__ __volatile__("dmb":::"memory")
+
 #ifdef __cplusplus
   }
 #endif
@@ -2055,6 +2058,9 @@
 #define InterlockedCompareExchangePointerAcquire _InterlockedCompareExchangePointer
 #define InterlockedCompareExchangePointerRelease _InterlockedCompareExchangePointer
 
+#define YieldProcessor() __asm__ __volatile__("dmb ishst\n\tyield":::"memory")
+#define MemoryBarrier() __asm__ __volatile__("dmb sy":::"memory")
+
 #ifdef __cplusplus
   }
 #endif