[Feature][ZXW-33]merge ZXW 0428 version
Change-Id: I11f167edfea428d9fab198ff00ff1364932d1b0b
diff --git a/ap/libc/glibc/glibc-2.23/math/s_cproj.c b/ap/libc/glibc/glibc-2.23/math/s_cproj.c
new file mode 100644
index 0000000..d47f009
--- /dev/null
+++ b/ap/libc/glibc/glibc-2.23/math/s_cproj.c
@@ -0,0 +1,44 @@
+/* Compute projection of complex double value to Riemann sphere.
+ Copyright (C) 1997-2016 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
+
+ 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/>. */
+
+#include <complex.h>
+#include <math.h>
+#include <math_private.h>
+
+
+__complex__ double
+__cproj (__complex__ double x)
+{
+ if (isinf (__real__ x) || isinf (__imag__ x))
+ {
+ __complex__ double res;
+
+ __real__ res = INFINITY;
+ __imag__ res = __copysign (0.0, __imag__ x);
+
+ return res;
+ }
+
+ return x;
+}
+weak_alias (__cproj, cproj)
+#ifdef NO_LONG_DOUBLE
+strong_alias (__cproj, __cprojl)
+weak_alias (__cproj, cprojl)
+#endif