1 files changed, 63 insertions, 0 deletions
diff --git a/sysdeps/ia64/strncmp.S b/sysdeps/ia64/strncmp.S
new file mode 100644
index 0000000..d24bcdf
--- /dev/null
+++ b/sysdeps/ia64/strncmp.S
@@ -0,0 +1,63 @@
+/* Optimized version of the standard strncmp() function.
+   This file is part of the GNU C Library.
+   Copyright (C) 2000 Free Software Foundation, Inc.
+   Contributed by Dan Pop <Dan.Pop@cern.ch>.
+
+   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.  */
+
+/* Return: the result of the comparison
+
+   Inputs:
+        in0:    s1
+        in1:    s2
+  	in2:	n
+
+   Unlike memcmp(), this function is optimized for mismatches within the
+   first few characters.  */
+
+#include <sysdep.h>
+#undef ret
+
+#define s1		in0
+#define s2		in1
+#define n		in2
+
+#define saved_pfs	r14
+#define val1		r15
+#define val2		r16
+
+
+ENTRY(strncmp)
+	alloc	saved_pfs = ar.pfs, 3, 0, 0, 0
+	mov	ret0 = r0
+	cmp.eq  p6, p0 = r0, r0		// set p6
+	cmp.eq	p7, p0 = n, r0		// return immediately if n == 0
+(p7)	br.cond.spnt .restore_and_exit ;;
+.loop:
+	ld1	val1 = [s1], 1
+	ld1	val2 = [s2], 1
+	adds	n = -1, n		// n--
+	;;
+	cmp.ne.and p6, p0 = val1, r0
+	cmp.ne.and p6, p0 = val2, r0
+	cmp.ne.and p6, p0 = n, r0
+	cmp.eq.and p6, p0 = val1, val2
+(p6)	br.cond.sptk .loop
+	sub	ret0 = val1, val2
+.restore_and_exit:
+	mov	ar.pfs = saved_pfs
+	br.ret.sptk.many b0
+END(strncmp)