[Feature][ZXW-33]merge ZXW 0428 version
Change-Id: I11f167edfea428d9fab198ff00ff1364932d1b0b
diff --git a/ap/libc/glibc/glibc-2.23/math/e_scalbl.c b/ap/libc/glibc/glibc-2.23/math/e_scalbl.c
new file mode 100644
index 0000000..53e9ca2
--- /dev/null
+++ b/ap/libc/glibc/glibc-2.23/math/e_scalbl.c
@@ -0,0 +1,58 @@
+/* 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 <fenv.h>
+#include <math.h>
+#include <math_private.h>
+
+
+static long double
+__attribute__ ((noinline))
+invalid_fn (long double x, long double fn)
+{
+ if (__rintl (fn) != fn)
+ {
+ feraiseexcept (FE_INVALID);
+ return __nan ("");
+ }
+ else if (fn > 65000.0L)
+ return __scalbnl (x, 65000);
+ else
+ return __scalbnl (x,-65000);
+}
+
+
+long double
+__ieee754_scalbl (long double x, long double fn)
+{
+ if (__glibc_unlikely (isnan (x)))
+ return x * fn;
+ if (__glibc_unlikely (!isfinite (fn)))
+ {
+ if (isnan (fn) || fn > 0.0L)
+ return x * fn;
+ if (x == 0.0L)
+ return x;
+ return x / -fn;
+ }
+ if (__glibc_unlikely (fabsl (fn) >= 0x1p31L || (long double) (int) fn != fn))
+ return invalid_fn (x, fn);
+
+ return __scalbnl (x, (int) fn);
+}
+strong_alias (__ieee754_scalbl, __scalbl_finite)