aarch64: morello: string: dummy c strncmp

diff --git a/sysdeps/aarch64/morello/strncmp.c b/sysdeps/aarch64/morello/strncmp.c
new file mode 100644 (file)
index 0000000..962b2c4
--- /dev/null
+++ b/sysdeps/aarch64/morello/strncmp.c
@@ -0,0 +1,32 @@
+/* Simple strncmp.
+
+   Copyright (C) 2022 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 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; see the file COPYING.LIB.  If
+   not, see <https://www.gnu.org/licenses/>.  */
+
+#include <string.h>
+
+int strncmp(const char *s1, const char *s2, size_t n)
+{
+  const unsigned char *us1 = (const unsigned char *) s1;
+  const unsigned char *us2 = (const unsigned char *) s2;
+  for (; n > 0; us1++, us2++, n--)
+    if (*us1 != *us2 || *us1 == 0)
+      return *us1 - *us2;
+  return 0;
+}
+
+libc_hidden_builtin_def (strncmp)