[Feature][ZXW-33]merge ZXW 0428 version
Change-Id: I11f167edfea428d9fab198ff00ff1364932d1b0b
diff --git a/ap/libc/glibc/glibc-2.23/math/w_atan2l.c b/ap/libc/glibc/glibc-2.23/math/w_atan2l.c
new file mode 100644
index 0000000..66801d7
--- /dev/null
+++ b/ap/libc/glibc/glibc-2.23/math/w_atan2l.c
@@ -0,0 +1,41 @@
+/* Copyright (C) 2011-2016 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Ulrich Drepper <drepper@gmail.com>, 2011.
+
+ 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/>. */
+
+/*
+ * wrapper atan2l(y,x)
+ */
+
+#include <errno.h>
+#include <math.h>
+#include <math_private.h>
+
+
+long double
+__atan2l (long double y, long double x)
+{
+ long double z;
+
+ if (__builtin_expect (x == 0.0L && y == 0.0L, 0) && _LIB_VERSION == _SVID_)
+ return __kernel_standard_l (y, x, 203); /* atan2(+-0,+-0) */
+
+ z = __ieee754_atan2l (y, x);
+ if (__glibc_unlikely (z == 0.0L && y != 0.0L && isfinite (x)))
+ __set_errno (ERANGE);
+ return z;
+}
+weak_alias (__atan2l, atan2l)