Alpha ev67 ffs implementation.

sysdeps/alpha/alphaev67/ffs.S

@@ -0,0 +1,50 @@
+/* Copyright (C) 2000 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+/* Finds the first bit set in an integer.  */
+
+#include <sysdep.h>
+
+	.arch ev6
+	.set noreorder
+	.set noat
+
+
+ENTRY(__ffs)
+#ifdef PROF
+	ldgp	gp, 0(pv)
+	lda	AT, _mcount
+	jsr	AT, (AT), _mcount
+	.prologue 1
+#else
+	.prologue 0
+#endif
+
+	zap	$16, 0xF0, $16
+	cttz	$16, $0
+	addq	$0, 1, $0
+	cmoveq	$16, 0, $0
+
+	nop
+	nop
+	nop
+	ret
+
+END(__ffs)
+
+weak_alias (__ffs, ffs)