Merge commit 'refs/top-bases/t/bigmem' into t/bigmem

1 files changed, 53 insertions, 0 deletions

diff --git a/sysdeps/ia64/strcmp.S b/sysdeps/ia64/strcmp.S
new file mode 100644
index 0000000000..c96262a35e
--- /dev/null
+++ b/sysdeps/ia64/strcmp.S
@@ -0,0 +1,53 @@
+/* Optimized version of the standard strcmp() function.
+   This file is part of the GNU C Library.
+   Copyright (C) 2000-2015 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 Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+/* Return: the result of the comparison
+
+   Inputs:
+        in0:    s1
+        in1:    s2
+
+   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 val1		r15
+#define val2		r16
+
+
+ENTRY(strcmp)
+	alloc	r2 = ar.pfs, 2, 0, 0, 0
+.loop:
+	ld1	val1 = [s1], 1
+	ld1	val2 = [s2], 1
+	cmp.eq	p6, p0 = r0, r0		// set p6
+	;;
+	cmp.ne.and p6, p0 = val1, r0
+	cmp.ne.and p6, p0 = val2, r0
+	cmp.eq.and p6, p0 = val1, val2
+(p6)	br.cond.sptk .loop
+	sub	ret0 = val1, val2
+	br.ret.sptk.many b0
+END(strcmp)
+libc_hidden_builtin_def (strcmp)