[Feature][ZXW-33]merge ZXW 0428 version
Change-Id: I11f167edfea428d9fab198ff00ff1364932d1b0b
diff --git a/ap/libc/glibc/glibc-2.23/math/w_pow.c b/ap/libc/glibc/glibc-2.23/math/w_pow.c
new file mode 100644
index 0000000..12c0591
--- /dev/null
+++ b/ap/libc/glibc/glibc-2.23/math/w_pow.c
@@ -0,0 +1,78 @@
+/* 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/>. */
+
+#include <math.h>
+#include <math_private.h>
+
+
+/* wrapper pow */
+double
+__pow (double x, double y)
+{
+ double z = __ieee754_pow (x, y);
+ if (__glibc_unlikely (!isfinite (z)))
+ {
+ if (_LIB_VERSION != _IEEE_)
+ {
+ if (isnan (x))
+ {
+ if (y == 0.0)
+ /* pow(NaN,0.0) */
+ return __kernel_standard (x, y, 42);
+ }
+ else if (isfinite (x) && isfinite (y))
+ {
+ if (isnan (z))
+ /* pow neg**non-int */
+ return __kernel_standard (x, y, 24);
+ else if (x == 0.0 && y < 0.0)
+ {
+ if (signbit (x) && signbit (z))
+ /* pow(-0.0,negative) */
+ return __kernel_standard (x, y, 23);
+ else
+ /* pow(+0.0,negative) */
+ return __kernel_standard (x, y, 43);
+ }
+ else
+ /* pow overflow */
+ return __kernel_standard (x, y, 21);
+ }
+ }
+ }
+ else if (__builtin_expect (z == 0.0, 0) && isfinite (x) && isfinite (y)
+ && _LIB_VERSION != _IEEE_)
+ {
+ if (x == 0.0)
+ {
+ if (y == 0.0)
+ /* pow(0.0,0.0) */
+ return __kernel_standard (x, y, 20);
+ }
+ else
+ /* pow underflow */
+ return __kernel_standard (x, y, 22);
+ }
+
+ return z;
+}
+weak_alias (__pow, pow)
+#ifdef NO_LONG_DOUBLE
+strong_alias (__pow, __powl)
+weak_alias (__pow, powl)
+#endif