Update of /cvsroot/linux-vax/kernel-2.5/include/asm-vax
In directory usw-pr-cvs1:/tmp/cvs-serv17366
Modified Files:
bitops.h
Log Message:
Added __ffs() (works like ffz() in that result is undefined if no bit is
set in argument - contrast with ffs() which returns -1 if nothing set)
Index: bitops.h
===================================================================
RCS file: /cvsroot/linux-vax/kernel-2.5/include/asm-vax/bitops.h,v
retrieving revision 1.4
retrieving revision 1.5
diff -u -r1.4 -r1.5
--- bitops.h 5 Jun 2002 21:55:04 -0000 1.4
+++ bitops.h 6 Jun 2002 00:06:11 -0000 1.5
@@ -341,6 +341,20 @@
return word;
}
+/**
+ * __ffs - find first bit in word.
+ * @word: The word to search
+ *
+ * Undefined if no bit exists, so code should check against 0 first.
+ */
+static __inline__ unsigned long __ffs(unsigned long word)
+{
+ __asm__("ffs $0, $32, %1 , %0\n"
+ :"=ir" (word)
+ :"ir" (word));
+ return word;
+}
+
#ifdef __KERNEL__
/**
* ffs - find first bit set
|
