* common.din (ffsl): Export.

(ffsll): Export.
	* syscalls.cc (ffs): Implement using GCC intrinsic.
	(ffsl): Ditto.
	(ffsll): Ditto.
	* include/cygwin/version.h (CYGWIN_VERSION_API_MINOR): Bump.

winsup/cygwin/common.din

@@ -374,6 +374,8 @@ feupdateenv SIGFE
 fexecve SIGFE
 fflush SIGFE
 ffs NOSIGFE
+ffsl NOSIGFE
+ffsll NOSIGFE
 fgetc SIGFE
 fgetpos SIGFE
 fgets SIGFE

winsup/cygwin/include/cygwin/version.h

@@ -451,12 +451,13 @@ details. */
       275: Introduce account mapping from Windows account DBs.  Add CW_SETENT,
 	   CW_GETENT, CW_ENDENT, CW_GETNSSSEP, CW_GETPWSID, CW_GETGRSID,
 	   CW_CYGNAME_FROM_WINNAME.
+      276: Export ffsl, ffsll.
      */
 
      /* Note that we forgot to bump the api for ualarm, strtoll, strtoull */
 
 #define CYGWIN_VERSION_API_MAJOR 0
-#define CYGWIN_VERSION_API_MINOR 275
+#define CYGWIN_VERSION_API_MINOR 276
 
      /* There is also a compatibity version number associated with the
 	shared memory regions.  It is incremented when incompatible

winsup/cygwin/syscalls.cc

@@ -3836,22 +3836,19 @@ nice (int incr)
 extern "C" int
 ffs (int i)
 {
-  static const unsigned char table[] =
+  return __builtin_ffs (i);
+}
+
+extern "C" int
+ffsl (long i)
 {
-      0,1,2,2,3,3,3,3,4,4,4,4,4,4,4,4,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,
-      6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,
-      7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
-      7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
-      8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
-      8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
-      8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
-      8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8
-    };
-  unsigned x = i & -i;
+  return __builtin_ffsl (i);
+}
 
-  int a = x <= 0xffff ? (x <= 0xff ? 0 : 8) : (x <= 0xffffff ?  16 : 24);
-
-  return table[x >> a] + a;
+extern "C" int
+ffsll (long long i)
+{
+  return __builtin_ffsll (i);
 }
 
 static void