[ros-diffs] [tkreuzer] 40088: implement __mulh and __umulh

[tkreuzer at svn.reactos.org]

Author: tkreuzer
Date: Wed Mar 18 19:17:53 2009
New Revision: 40088

URL: http://svn.reactos.org/svn/reactos?rev=40088&view=rev
Log:
implement __mulh and __umulh

Modified:
    branches/ros-amd64-bringup/reactos/include/crt/mingw32/intrin_x86.h

Modified: branches/ros-amd64-bringup/reactos/include/crt/mingw32/intrin_x86.h
URL: http://svn.reactos.org/svn/reactos/branches/ros-amd64-bringup/reactos/include/crt/mingw32/intrin_x86.h?rev=40088&r1=40087&r2=40088&view=diff
==============================================================================
--- branches/ros-amd64-bringup/reactos/include/crt/mingw32/intrin_x86.h [iso-8859-1] (original)
+++ branches/ros-amd64-bringup/reactos/include/crt/mingw32/intrin_x86.h [iso-8859-1] Wed Mar 18 19:17:53 2009
@@ -974,6 +974,23 @@
 	return retval;
 }
 
+#ifdef _M_AMD64
+
+static __inline__ __attribute__((always_inline)) __int64 __mulh(__int64 a, __int64 b)
+{
+	__int64 retval;
+	__asm__("imulq %[b]" : "=d" (retval) : [a] "a" (a), [b] "rm" (b));
+	return retval;
+}
+
+static __inline__ __attribute__((always_inline)) unsigned __int64 __umulh(unsigned __int64 a, unsigned __int64 b)
+{
+	unsigned __int64 retval;
+	__asm__("mulq %[b]" : "=d" (retval) : [a] "a" (a), [b] "rm" (b));
+	return retval;
+}
+
+#endif
 
 /*** Port I/O ***/
 static __inline__ __attribute__((always_inline)) unsigned char __inbyte(const unsigned short Port)