implement _byteswap_ushort for arm

[reactos.git] / reactos / include / crt / mingw32 / intrin_arm.h

diff --git a/reactos/include/crt/mingw32/intrin_arm.h b/reactos/include/crt/mingw32/intrin_arm.h
index 3e78892..39c166a 100644 (file)
--- a/reactos/include/crt/mingw32/intrin_arm.h
+++ b/reactos/include/crt/mingw32/intrin_arm.h
@@ -32,8 +32,30 @@
 #error Unsupported compiler
 #endif
 
+#define _ReturnAddress() (__builtin_return_address(0))
 #define _ReadWriteBarrier() __sync_synchronize()
 
+__INTRIN_INLINE unsigned short _byteswap_ushort(unsigned short value)
+{
+       return __builtin_bswap32(value) >> 16;
+}
+
+__INTRIN_INLINE unsigned _CountLeadingZeros(long Mask)
+{
+    return Mask ? __builtin_clz(Mask) : 32;
+}
+
+__INTRIN_INLINE unsigned _CountTrailingZeros(long Mask)
+{
+    return Mask ? __builtin_ctz(Mask) : 32;
+}
+
+__INTRIN_INLINE unsigned char _BitScanForward(unsigned long * const Index, const unsigned long Mask)
+{
+       *Index = __builtin_ctz(Mask);
+       return Mask ? 1 : 0;
+}
+
 __INTRIN_INLINE char _InterlockedCompareExchange8(volatile char * const Destination, const char Exchange, const char Comperand)
 {
        return __sync_val_compare_and_swap(Destination, Comperand, Exchange);