[ros-diffs] [tkreuzer] 39446: define BitScanReverse to _BitScanReverse, add BitScanForeward the same way, add 64 bit InterlockedBittest intrinsics

Author: tkreuzer
Date: Fri Feb  6 18:20:25 2009
New Revision: 39446

URL: http://svn.reactos.org/svn/reactos?rev=39446&view=rev
Log:
define BitScanReverse to _BitScanReverse, add BitScanForeward the same way, add 64 bit InterlockedBittest intrinsics

Modified:
    trunk/reactos/include/ddk/wdm.h

Modified: trunk/reactos/include/ddk/wdm.h
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/include/ddk/wdm.h?rev=39446...
==============================================================================
--- trunk/reactos/include/ddk/wdm.h [iso-8859-1] (original)
+++ trunk/reactos/include/ddk/wdm.h [iso-8859-1] Fri Feb  6 18:20:25 2009
@@ -181,30 +181,14 @@
 #endif
 }

-static __inline__ BOOLEAN
-BitScanReverse(OUT ULONG *Index,
-               IN ULONG Mask)
-{
-	BOOLEAN BitPosition = 0;
-#if defined(_M_IX86)
-	__asm__ __volatile__("bsrl %2,%0\n\t"
-	                     "setnz %1\n\t"
-	                     :"=&r" (*Index), "=q" (BitPosition)
-	                     :"rm" (Mask)
-	                     :"memory");
-	return BitPosition;
-#else
-	/* Slow implementation for now */
-	for( *Index = 31; *Index; (*Index)-- ) {
-		if( (1<<*Index) & Mask ) {
-			return TRUE;
-		}
-	}
-
-	return FALSE;
-#endif
-}
-
+#endif
+
+#define BitScanForward _BitScanForward
+#define BitScanReverse _BitScanReverse
+
+#ifdef _M_AMD64
+#define InterlockedBitTestAndSet64 _interlockedbittestandset64
+#define InterlockedBitTestAndReset64 _interlockedbittestandreset64
 #endif